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Journal articles on the topic 'Alphege'

Author: Grafiati
Published: 25 February 2023
Last updated: 4 March 2023

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1

Mercer, Giles. "Alphege (954–1012): A Saint for His Time and for Our Time." Downside Review 138, no. 2 (April 2020): 68–78. http://dx.doi.org/10.1177/0012580620931396.

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The following has been adapted from talks given at St Alphege Church, Solihull; Our Lady and St Alphege Church, Bath; and St Joseph’s Church, Peasedown St John, and to the English Catholic History Association, Winchester Catholic History Society and Prinknash Abbey Book Club. Alphege is one of the outstanding saints from these lands, Bath’s greatest son, a gifted monastic leader, a radical bishop of Winchester and a self-sacrificing archbishop of Canterbury. He was to be revered throughout pre-Reformation England and beyond. I will make some general points about Alphege’s world, then set out what we know about the life and death of Alphege and finally suggest why he is important for us today.
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2

AN, JIANMEI, RURU CHEN, and GUSTAV PAULAY. "Three new species of abdominal shrimp parasites (Crustacea: Isopoda: Bopyridae: Hemiarthrinae) from the Indo-West Pacific." Zootaxa 4845, no. 2 (September 2, 2020): 264–74. http://dx.doi.org/10.11646/zootaxa.4845.2.7.

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Three new species of the parasitic isopod subfamily Hemiarthrinae Markham, 1972 are described. Allodiplophryxus unilateralis n. sp. is described from Western Australia, infesting the palaemonid shrimp Jocaste lucina (Nobili, 1901), and females differ from the only other species in the genus in possessing six pleomeres, an asymmetrical first oostegite and pleopods restricted to the short side of the body. Loki athanus n. sp. is described from Madagascar, infesting the alpheid shrimp Athanas parvus de Man, 1910, and females differ from the only other species in the genus in possessing well-developed lateral plates on pleomere 4 and four pairs of uniramous pleopods. Hemiarthrus alphei n. sp. is described from French Polynesia, infesting the alpheid shrimp Alpheus crinitus Dana, 1852, and females differ from the four other known Hemiarthrus species in having pleomeres with well-developed, symmetrical lateral plates, a barbula with three pairs of projections and a pointed pleotelson. Keys to species of Hemiarthrus and all genera of the Hemiarthrinae are presented.
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RAMOS-TAFUR, GABRIEL E. "Alpheus luiszapatai, a new species of rare and colorful deep water alpheid shrimp (Crustacea: Decapoda: Alpheidae) from Arusí, Chocó Department, Pacific Coast of Colombia." Zootaxa 4403, no. 3 (April 5, 2018): 540. http://dx.doi.org/10.11646/zootaxa.4403.3.7.

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A new species of deep water alpheid shrimp, Alpheus luiszapatai sp. nov., from Arusí, Chocó, Pacific coast of Colombia is described. The single female known was collected between the discarded bycatch of deep water shrimp trawls dedicated to the commercial fisheries of the “coliflor” shrimp Solenocera spp. This new species is placed putatively in the Alpheus brevirostris (Olivier, 1811) species group, and share some external morphological characters with Alpheus hephaestus Bracken-Grissom & Felder, 2014. It can be differentiated by the shape and ornamentation of major and minor chelipeds, the propodi and dactyli of third to fifth pereopods, the diaresis of uropodal exopod, the length of the rostral carina, color in life and bathymetric distribution. Additional comparison with another congeners pertaining to this species group complex from the eastern Pacific, western Atlantic and other oceanographic regions is discussed. A key for Alpheus brevirostris species group from the eastern Pacific is presented.
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4

Almeida, Alexandre Oliveira, Ana Carla Costa-Souza, Andressa Maria Cunha, Patricia Souza Santos, Mário Vitor Oliveira, and Guidomar Oliveira Soledade. "Estuarine caridean shrimps (Crustacea: Decapoda) from Ilhéus, Bahia, Brazil: Updated checklist and a key for their identification." Check List 9, no. 6 (November 1, 2013): 1396. http://dx.doi.org/10.15560/9.6.1396.

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We provide an updated list of the 22 species of caridean shrimps occurring in estuaries at Ilhéus, state of Bahia, Brazil, in the following families: Palaemonidae (4 species), Alpheidae (15 species), Hippolytidae (2 species) and Ogyrididae (1 species). The alpheid Automate cf. dolichognatha De Man, 1888 and the ogyridid Ogyrides alphaerostris (Kingsley, 1880) are reported from Bahia for the first time. The alpheids Alpheus brasileiro Anker, 2012, A. buckupi Almeida, Terossi, Araújo- Silva and Mantelatto, 2013, A. chacei Carvacho, 1979, A. nuttingi (Schmitt, 1924), Leptalpheus axianassae Dworschak and Coelho, 1999 and Salmoneus carvachoi Anker, 2007 are recorded from Ilhéus for the first time. Alpheus angulosus McClure, 2002 and A. carlae Anker, 2012 were previously reported from Ilhéus as A. armillatus (H. Milne Edwards, 1837). A key for identification of the carideans from estuaries of Ilhéus is provided.
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5

MARIN, IVAN. "Athanas alpheusophilus sp. nov. (Decapoda: Alpheidae)—a new Alpheus-associated shrimp from the Russian coast of the Sea of Japan." Zootaxa 4324, no. 1 (September 26, 2017): 50. http://dx.doi.org/10.11646/zootaxa.4324.1.3.

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A new alpheid shrimp, Athanas alpheusophilus sp. nov., is described on the basis of numerous mature specimens collected from burrows of Alpheus brevicristatus De Haan, 1844 in Vityaz Bay, which is part of Posjeta Bay on the Russian side of the Sea of Japan. The new species belongs to “Athanas dimorphus” species complex and can be clearly separated from Athanas japonicus Kubo, 1936 and relative species by unique combination of morphological features of male and female pereiopods I (chelipeds) and some other features. Moreover, Athanas alpheusophilus sp. nov. is the first species of the genus Athanas Leach, 1814 reported as a symbiont of larger burrowing snapping shrimps of the genus Alpheus Fabricius, 1798 (Crustacea: Decapoda: Alpheidae). Some taxonomic remarks on A. japonicus and related species are provided and Athanas lamellifer Kubo, 1940 is revalidated based on morphology of the male pereiopods I.
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6

PURUSHOTHAMAN, P., S. BHARATHI, A. T. DAMODHAR, T. T. AJITH KUMAR, and K. K. LAL. "Morphological and molecular approaches revealed a new species of snapping shrimp genus Alpheus Fabricius, 1798 (Decapoda: Caridea: Alpheidae) from Lakshadweep Islands, India." Zootaxa 5227, no. 4 (January 9, 2023): 426–42. http://dx.doi.org/10.11646/zootaxa.5227.4.2.

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A new species of the alpheid genus Alpheus Fabricius, 1798, Alpheus sulcipalma sp. nov., is described and illustrated based on the specimens collected from the intertidal zone of Agatti Island, Lakshadweep, India at 0.5–1.0 m depth. This species belongs to the A. edwardsii group by absences of tooth in the orbital hoods and presence of compressed major chela with dorsal and ventral notches. Alpheus sulcipalma sp. nov. is morphologically closely related with A. pacificus Dana, 1852, absence of balaeniceps crests in the minor chela and absences of spine in the merus of major pereiopod of both sexes. However, the new species differs from A. pacificus in presence of strong and broad triangular groove on the dorsolateral and dorsomesial surface of the palm of major chela; length ratio and armature of fingers and palm of minor chela, carpus segments of second and third pereiopods and telson length. The results of phylogenetic analyses using partial sequences of mitochondrial COI gene data compared between A. sulcipalma sp. nov. with congener species which strongly support the description of new species with available limited sequences. The interspecific genetic divergences of the COI gene for A. sulcipalma sp. nov. and A. pacificus were observed higher in ranges (11.1–28.9%).
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7

ANKER, ARTHUR, and CHARLES H. J. M. FRANSEN. "Alpheus leptochiroides De Man, 1909, a poorly known deep-water snapping shrimp with a unique third maxilliped (Malacostraca: Decapoda: Alpheidae)." Zootaxa 4712, no. 4 (December 23, 2019): 552–60. http://dx.doi.org/10.11646/zootaxa.4712.4.4.

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Alpheus leptochiroides De Man, 1909, a poorly-known species originally described from the Kai Islands in eastern Indonesia, is reported from Kavieng, eastern Papua New Guinea, representing only the second record of this snapping shrimp and slightly extending its distribution range into the tropical western Pacific. The original description was based on a relatively young specimen, whereas the Kavieng specimen is clearly an adult male. Most importantly, several rather important characters of the species were omitted and/or not illustrated by De Man, including the unique and diagnostic rounded cuticular expansions on several areas of the third maxilliped, not present in any other alpheid shrimp. Therefore, a full redescription of the species is provided, with new detailed illustrations.
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8

ANKER, ARTHUR. "Description of a third species in the alpheid shrimp genus Richalpheus Anker & Jeng, 2006 (Crustacea, Decapoda)." Zootaxa 3059, no. 1 (October 14, 2011): 59. http://dx.doi.org/10.11646/zootaxa.3059.1.4.

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A new species of the alpheid genus Richalpheus Anker & Jeng, 2006 is described from the Egyptian Red Sea and Moorea, French Polynesia. Richalpheus alpheoides sp. nov. differs from the two previously described species of this genus, R. palmeri Anker & Jeng, 2006 and R. dahabensis Dworschak & Anker, 2007, by the presence of a distinct proximal tooth on the dactylus fitting into a shallow fossa on the pollex of the major chela, reminiscent of the snapping mechanism in Alpheus Fabricius, 1798. Recently collected material of R. palmeri from Moorea is reported, whilst a specimen previously reported as R. palmeri is reassigned to R. alpheoides sp. nov. A key to the three known species of Richalpheus is provided.
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9

Herrera-Barquín, Hiram, Antonio Leija-Tristán, and Susana Favela-Lara. "Updated checklist of estuarine caridean shrimps (Decapoda: Caridea) from the southern region of Laguna Madre, Tamaulipas, Mexico, with new records and a key for taxonomic identification." Check List 14, no. 2 (April 27, 2018): 479–94. http://dx.doi.org/10.15560/14.2.479.

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We provide an updated list of the caridean shrimp species from the southern region of the Laguna Madre, Tamaulipas, Mexico, along with a key for taxonomic identification. The survey was conducted in 3 sites during 3 temporal seasons. A total of 2,989 specimens were collected belonging to 12 species, 6 genera, and to the following 4 families: Alpheidae, Hippolytidae, Palaemonidae, and Processidae. Hippolytidae was the most abundant family, followed by Palaemonidae, Alpheidae, and Processidae. The hippolytid Hippolyte obliquimanus Dana, 1852, the palaemonids Palaemon floridanus Chace, 1942, and P. northropi (Rankin, 1898), and the alpheid Alpheus cf. packardii Kingsley, 1880 represent new records for the Laguna Madre and selected areas of the Gulf of Mexico.
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10

ANKER, ARTHUR, CARLA HURT, and NANCY KNOWLTON. "Three transisthmian snapping shrimps (Crustacea: Decapoda: Alpheidae: Alpheus) associated with innkeeper worms (Echiura: Thalassematidae)in Panama." Zootaxa 1626, no. 1 (October 31, 2007): 1–23. http://dx.doi.org/10.11646/zootaxa.1626.1.1.

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The present study deals with three species of Alpheus, including two new species, living symbiotically in burrows of innkeeper worms (Echiura: Thalassematidae) on the tropical coasts of the western Atlantic and eastern Pacific Oceans. Alpheus christofferseni n. sp. is described on the basis of four specimens from Atol das Rocas, northwestern Brazil, and one specimen from Bocas del Toro, Caribbean coast of Panama. All specimens of this species were collected with suction pumps from burrows on intertidal or shallow subtidal sandflats; the Panamanian specimen was collected together with its echiuran host, Ochetostoma cf. edax (Fisher, 1946). Alpheus naos n. sp. is described on the basis of a single specimen found together with its host, Listriolobus sp., under large intertidal mud-covered rocks of Punta Culebra, Isla Naos, Pacific coast of Panama. Finally, two specimens of Alpheus aequus Kim & Abele, 1988 were collected together with their hosts, Ochetostoma edax, in the mixed rock-sand-mud intertidal of Coiba, Pacific coast of Panama. Remarkably, these three species are nearly identical in morphology and are also similar in color patterns. However, despite their morphological and ecological similarities, they are among the most genetically distinct of transisthmian alpheid geminate taxa examined to date. Genetic analyses suggest that A. aequus and A. naos n. sp. form an eastern Pacific clade whose sister taxon is the slightly more distantly related western Atlantic A. christofferseni n. sp. Estimated divergence times are ~10 mya for the two eastern Pacific species, and ~11–12 mya for the western Atlantic and eastern Pacific clades. Within Alpheus, A. christofferseni n. sp., A. aequus and A. naos n. sp. belong to the pantropical A. barbatus Coutière, 1897 species complex (A. barbatus clade), which also includes the eastern Atlantic A. ribeiroae Anker & Dworschak, 2004 and the Indo-West Pacific A. barbatus. The association of all three American species with thalassematid echiurans, as well as previous reports of associations between A. barbatus and echiurans in the western Pacific, suggest that this symbiosis is relatively ancient, having evolved in the ancestor of the A. barbatus clade (at least 12 mya and probably earlier).
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11

Bruce, A. J. "A new species of alpheid shrimp, Alpheus bannerorum from Northern Australia." Beagle : Records of the Museums and Art Galleries of the Northern Territory 4, no. 1 (December 1987): 61–72. http://dx.doi.org/10.5962/p.260897.

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12

Thompson, A. R. "Habitat and mutualism affect the distribution and abundance of a shrimp-associated goby." Marine and Freshwater Research 55, no. 1 (2004): 105. http://dx.doi.org/10.1071/mf03099.

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To elucidate factors that affect patterns of habitat use by a goby, Ctenogobiops feroculus, which interacts mutualistically with an alpheid shrimp, Alpheus djeddensis, goby density and habitat type were surveyed along the north shore of Moorea, French Polynesia. Although linear and quadratic multiple regression models both described the relationship between goby density and habitat as being statistically significant, more than twice the variation was accounted for by the quadratic model compared with the linear model. Further evaluation using univariate scatter plots confirmed that goby density correlated non-linearly with habitat as maximal goby density occurred in locations with approximately 71% sand and 29% rubble. Next, an aquarium-based, habitat choice experiment demonstrated that shrimp prefer to burrow in sand–rubble compared with pure sand, and that shrimp are unable to build tunnels in pure sand because burrows collapse in this substrate. This research shows that habitat choice by one organism (e.g. a shrimp) can, because of positive interactions, affect the distribution of another species (e.g. a goby). In addition, it highlights the importance of assessing non-linear relationships in studies of habitat use and, when appropriate, using statistical methods that do not rely on linear assumptions.
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Anker, Arthur. "Alpheus richpalmeri, a new species of snapping shrimp from the tropical eastern Atlantic (Malacostraca: Decapoda: Alpheidae)." Canadian Journal of Zoology 98, no. 12 (December 2020): 798–807. http://dx.doi.org/10.1139/cjz-2020-0020.

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A new snapping shrimp, Alpheus richpalmeri sp. nov., is described based on three specimens collected in the muddy–rocky intertidal of São Tomé Island, Gulf of Guinea, tropical eastern Atlantic. The new species belongs to the Alpheus brevirostris (Olivier, 1811) species group, sharing a series of morphological features and a similar colour pattern with two Atlantic species of the group, e.g., Alpheus roblesi Bracken-Grissom and Felder, 2014 and Alpheus ulalae Bracken-Grissom and Felder, 2014, as well as with the Indo-West Pacific Alpheus platyunguiculatus (Banner, 1953). The new species may have been previously reported from the tropical eastern Atlantic by A. Crosnier and J. Forest (1966. Ann. Inst. Oceanogr. Monaco, 44: 199–314) under the name Alpheus floridanus floridanus Kingsley, 1878, which is clearly different from the lectotype of Alpheus floridanus Kingsley, 1878 upon which H.D. Bracken-Grissom and D.L. Felder (2014. Zootaxa, 3895(4): 451–491) based their redescription of this species. The form previously known as Alpheus floridanus var. africana Balss, 1916, or Alpheus floridanus africanus, is elevated to full species rank as Alpheus africanus stat. nov., based on morphological differences and geographical separation from A. floridanus.
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Azofeifa-Solano, Juan C., Jeffrey A. Sibaja-Cordero, and Ingo S. Wehrtmann. "Sexual dimorphism of the major chela and sex ratio as indicators of the mating system in the estuarine snapping shrimp Alpheus colombiensis Wicksten, 1988 (Decapoda: Caridea: Alpheidae)." Journal of Crustacean Biology 40, no. 6 (September 24, 2020): 649–56. http://dx.doi.org/10.1093/jcbiol/ruaa069.

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Abstract The sexual selection over traits that favor access to mating partners could promote the emergence of sexual dimorphism when the pressure is different between sexes. Monogamous species are considered to have a low degree of sexual dimorphism. The highly diverse snapping shrimps are usually regarded as monogamous, but the mating system has been studied only in few species. We aimed to provide insights into the mating system and sexual dimorphism of Alpheus colombiensisWicksten, 1988. The adult sex ratio was female biased, and solitary ovigerous females were found, suggesting a temporary mate guarding type of mating system. Our results also revealed sexual dimorphism on the snapping claw, which is larger in males than in females. The male’s snapping claw is probably under sexual selection, which can be mediated by male-male competition or female choice. We also estimated the A. colombiensis female size at maturity at 5.2 ± 0.76 mm. Our results contradict the common idea that snapping shrimps are monogamous species, and support that A. colombiensis probably have a temporary mate guarding (e.g., males can sexually interact with more than one female, in opposition to sexual monogamy). This study also sustains the growing evidence that alpheid shrimps display snapping claw sexual dimorphism.
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Mossolin, Emerson, Fernando Mantelatto, and Caio Pavanelli. "Maternal investment in egg production: environmental and population-specific effects on offspring performance in the snapping shrimp Alpheus nuttingi (Schmitt, 1924) (Decapoda, Alpheidae)." Animal Biology 60, no. 3 (2010): 237–47. http://dx.doi.org/10.1163/157075610x516466.

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AbstractAmong marine invertebrates, the overall biomass invested in egg production varies widely within populations, which can result from the interaction of endogenous and exogenous factors. Species that have constant reproduction throughout the year can be good models to study the influence of environmental factors on reproductive processes. We conducted a seasonal comparison of egg production in the intertidal snapping shrimp Alpheus nuttingi, which shows a continuous reproductive pattern, to examine the hypothesis that differences in egg production are driven by environmental conditions and population features. This population showed an uncommon strategy, characterized by females that produce eggs of varying sizes within their clutches, with reduced egg volume when the number of eggs is higher (Spring-Summer). In these seasons, higher temperatures and greater food availability may allow the production of more eggs compared to the Autumn-Winter seasons. Compared to other alpheid shrimps, this population produces small eggs, but in larger numbers. Despite the higher fecundity, the reproductive output is relatively low, this production being supported by the large size of females from the southern Atlantic region. Our findings showed that the egg production of A. nuttingi was greatly influenced by environmental factors. Therefore, this shrimp, and probably other decapods that possess continuous reproduction, adopt different reproductive strategies during the year.
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Li, Yunpeng. "Film and TV Animation Production Based on Artificial Intelligence AlphaGd." Mobile Information Systems 2021 (December 18, 2021): 1–8. http://dx.doi.org/10.1155/2021/1104248.

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The dual attributes of artificial intelligence AlphaGd production, combined with modern social culture, industrial economy, and other factors, show rich connotation and extension in the development process of film and television animation production from the perspective of artificial intelligence AlphaGd. This paper first discusses and analyzes the practical significance and points out that AI AlphaGd has powerful functions, can greatly improve the sense of animation, and can effectively promote the technological innovation of animation production, then introduces the role modeling ideas of AI AlphaGd, and describes the modeling steps. Finally, the application of AI AlphaGd works produced after the use of artificial intelligence AlphaGd is more lifelike and specific in both the embodiment of the character image and the basic picture effect, which can make the audience have a more comfortable and perfect viewing experience. After summarizing, this paper puts forward the shortcomings of perspective artificial intelligence AlphaGd. Artificial intelligence may be useful in key decision-making processes, but it may negate the need for humans to be involved in these discussions. In view of these shortcomings, further research and discussion are made to accumulate new experience for product development and production from the perspective of artificial intelligence AlphaGd.
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Jaafar, Zeehan, and Zhisheng Hou. "Partner choice in Gobiid fish Myersina macrostoma living in association with the alpheid shrimp Alpheus rapax." Symbiosis 56, no. 3 (April 27, 2012): 121–27. http://dx.doi.org/10.1007/s13199-012-0166-2.

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ASHRAFI, HOSSEIN, ARTHUR ANKER, and ZDENĚK ĎURIŠ. "Salmoneus shojaei, a new species of mangrove-dwelling alpheid shrimp (Decapoda: Caridea) from Iran." Zootaxa 5165, no. 1 (July 13, 2022): 121–32. http://dx.doi.org/10.11646/zootaxa.5165.1.7.

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During a survey of the mangrove infauna on the Iranian side of the Persian Gulf and the Gulf of Oman several specimens of a new alpheid shrimp, Salmoneus shojaei sp. nov., were collected around pneumatophores of mangrove trees, mostly in association with the larger burrowing snapping shrimps of the genus Alpheus Fabricius, 1798. The new species appears to be a member of the S. gracilipes species group and is morphologically closest to S. colinorum De Grave, 2004 and S. alpheophilus Anker & Marin, 2006. However, a unique combination of morphological characters, such as the carapace without rostral carina, the unarmed ischium of the major cheliped, the armed ischia of the minor cheliped and second pereiopod, the very slender dactyli of the fourth and third pereiopods, and the posterior margin of the telson with a deep U-shaped notch, distinguishes the new species from all other members of the S. gracilipes group. In addition, S. shojaei sp. nov. presents a diagnostic, albeit very faint, banding of the pleon, which separates it from most other species of the S. gracilipes group with known colour patterns. A DNA barcode (a partial fragment of the mitochondrial gene, CO1), as well as partial fragments of the mitochondrial 16S rRNA and the nuclear H3 genes, are provided to genetically characterise the new taxon.
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ANKER, ARTHUR. "On three symbiotic species of the alpheid shrimp genus Salmoneus Holthuis, 1955 from the Indo-West Pacific, including one new to science (Malacostraca: Decapoda: Caridea)." Zootaxa 4651, no. 1 (August 2, 2019): 51–63. http://dx.doi.org/10.11646/zootaxa.4651.1.3.

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Three species of the alpheid shrimp genus Salmoneus Holthuis, 1955 associated with burrows of other decapod crustaceans are reported from various Indo-West Pacific localities. Salmoneus venustus sp. nov. is described based on material collected at two distant localities, Nha Trang Bay, southern Vietnam, the type locality of the new species, and the Yiti-Sifah region east of Muscat, northern Oman. Both specimens were collected with the aid of a suction pump applied to burrow entrances or mounds in muddy sand; the holotype was possibly associated with burrows of the callianassid ghost shrimp, Glypturus sp. Salmoneus venustus sp. nov. shares many characteristics with S. latirostris (Coutière, 1897), including the red banding of the pleon, but can be distinguished from S. latirostris and all other species of the genus by a unique combination of morphological characters. The large-sized Salmoneus brucei Komai, 2009 is reported from Sumba, central Indonesia, representing a significant southward extension of the species’ previously known distribution range and the first record since its original description. The callianassid ghost shrimp Lepidophthalmus cf. rosae (Nobili, 1904) is recorded as a new host of S. brucei. Finally, Salmoneus colinorum De Grave, 2004, associated with burrows of larger snapping shrimps from the Alpheus malabaricus Fabricius, 1798 species complex, is reported for the first time from Madang, Papua New Guinea, representing an eastward extension of the species’ previously known distribution range.
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PURUSHOTHAMAN, P., C. P. ABHILASH, T. T. AJITH KUMAR, and K. K. LAL. "A new alpheid shrimp, Alpheus mannarensis sp. nov. (Crustacea; Decapoda; Alpheidae) from Gulf of Mannar, Southern India." Zootaxa 5026, no. 1 (August 24, 2021): 127–35. http://dx.doi.org/10.11646/zootaxa.5026.1.5.

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A new species of the genus Alpheus Fabricius, 1798, A. mannarensis sp. nov. is described and represented based on the materials collected from the shallow and rocky reefs, Gulf of Mannar (Thoothukudi waters), Southern India. This is the first report of Alpheus species from the Gulf of Mannar region. The new species is assigned to the Alpheus brevirostris group, and is distinguished from other species of this group by the combination of the following features: rostral ridge lower than orbital hood in lateral view and postrostral carina not extended to the middle of the carapace, palm of major chela with a transverse groove near the base of dactylus, the ultimate segment of the third maxilliped slender, fingers of minor chela of male slightly longer than palm, the first carpal segment of second pereiopods shorter than second segment, merus of third pereiopods slender and unarmed, dactylus of third pereiopods slender and subspatulate, and unique colour patterns of longitudinal light lines on the reddish body.
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Corfield, J. L., and C. G. Alexander. "The distribution of two species of alpheid shrimp, Alpheus edwardsii and A. Lobidens, on a tropical beach." Journal of the Marine Biological Association of the United Kingdom 75, no. 3 (August 1995): 675–87. http://dx.doi.org/10.1017/s0025315400039096.

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Alpheus edwardsii Audouin and Alpheus lobidens de Man (Crustacea: Decapoda: Alpheidae) are two intertidal snapping shrimp that burrow in association with rocks. They are morphologically similar and are often found in the same intertidal zone. The competitive exclusion theory states that two co-existing species must partition resources. The partitioning of food items as a resource appears unlikely, as gut content analyses revealed that the two species have similar diets and the relationship of shrimp condition and shrimp density indicates that food supply was not in limited supply. Instead the two species partition the resources of space within the intertidal zone, and shelter. The two species were found to exist largely in isolation from each other. Alpheus edwardsii occurred across much of the intertidal zone. Within this range A. edwardsii were most abundant in substrata with a low proportion (<50%) of mud. These substrata are better suited to their elaborate method of burrow construction. The simpler burrow construction method of A. lobidens allows this species the potential to occupy a wide range of substratum types; however, they were found only in muddy substrata with substantial surface rock cover at tidal elevations of 1.18m above datum or below. The restriction of A. lobidens to this region of the intertidal zone is probably related, in part, to their physiological requirements. In regions of co-occurrence, A. lobidens were significantly smaller than A. edwardsii, and utilized smaller rocks as shelters, thus avoiding direct interspecific competition for this resource. The absence of large A. lobidens from these areas may reflect their ability to procure shelter in competition with A. edwardsii, as behavioural experiments conducted in this study found that A. edwardsii were the dominant competitors for this resource.
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Holmer, Marianne, and Anna Cecelie Heilskov. "Distribution and bioturbation effects of the tropical alpheid shrimp Alpheus macellarius in sediments impacted by milkfish farming." Estuarine, Coastal and Shelf Science 76, no. 3 (February 2008): 657–67. http://dx.doi.org/10.1016/j.ecss.2007.07.033.

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SUG, Hyontai. "Performance of Machine Learning Algorithms and Diversity in Data." MATEC Web of Conferences 210 (2018): 04019. http://dx.doi.org/10.1051/matecconf/201821004019.

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Recent world events in go games between human and artificial intelligence called AlphaGo showed the big advancement in machine learning technologies. While AlphaGo was trained using real world data, AlphaGo Zero was trained using massive random data, and the fact that AlphaGo Zero won AlphaGo completely revealed that diversity and size in training data is important for better performance for the machine learning algorithms, especially in deep learning algorithms of neural networks. On the other hand, artificial neural networks and decision trees are widely accepted machine learning algorithms because of their robustness in errors and comprehensibility respectively. In this paper in order to prove that diversity and size in data are important factors for better performance of machine learning algorithms empirically, the two representative algorithms are used for experiment. A real world data set called breast tissue was chosen, because the data set consists of real numbers that is very good property for artificial random data generation. The result of the experiment proved the fact that the diversity and size of data are very important factors for better performance.
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Bakir, Kerem, Akin T. İlkyaz, Celalettin Aydin, and Gürel Türkmen. "The presence of Alpheus lobidens De Haan, 1849 (Decapoda, Alpheidae) on the Turkish Aegean Sea coast." Crustaceana 88, no. 6 (2015): 651–56. http://dx.doi.org/10.1163/15685403-00003434.

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A male specimen of Alpheus lobidens De Haan, 1849 was collected on the Aegean coast of Turkey. It is the second Lessepsian species belonging to the genus Alpheus from the Turkish coast of the Aegean Sea.
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Bollinger, Terry. "Why AlphaFold is Not Like AlphaGo." Terry's Archive Online 2021, no. 02 (April 12, 2021): 0206. http://dx.doi.org/10.48034/20210206.

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AlphaFold2 is the second major iteration of a protein structure predictor by Google-owned DeepMind Lab. DeepMind is famous for creating AlphaGo Zero, the first game-playing system to transcend the rules taught by human trainers. When AlphaFold2 made a significant leap in protein prediction accuracy in the fourteenth annual CASP competition, even reserved publications like Nature were noticeably breathless in their praise of the results. It was not just the impressive and well-proven leap in prediction accuracy that made AlphaFold2 notable, but also its association with the DeepMind brand and implicitly with the beyond-human learning successes of AlphaGo Zero. But is this latter component of its notoriety and acclaim justified? That is, beyond superficial name similarities, is the design of AlphaFold2 sufficiently like that of AlphaGo Zero to enable a similar leap ahead of human knowledge and expertise? An analysis of the underlying designs says no. In contrast to the fully virtualized, faster-than-human learning speeds of AlphaGo Zero, the learning speed of AlphaFold2 remains firmly attached to and limited by human experimental time. AlphFold2 thus is inherently incapable of the trans-human leaps in learning speed demonstrated by AlphaGo Zero.
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ANKER, ARTHUR, MANAL AL-KANDARI, and SAMMY DE GRAVE. "Taxonomic notes on Alpheus inopinatus Holthuis & Gottlieb, 1958 and Alpheus cf. lobidens De Haan, 1849 from Kuwait (Malacostraca: Decapoda: Alpheidae)." Zootaxa 4851, no. 1 (September 9, 2020): 189–97. http://dx.doi.org/10.11646/zootaxa.4851.1.10.

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The status of the common intertidal snapping shrimp, Alpheus inopinatus Holthuis & Gottlieb, 1958, is discussed based on newly collected material from Kuwait. Alpheus inopinatus was previously confused with morphologically very similar species in the Alpheus lobidens De Haan, 1849 species complex, formerly identified as A. crassimanus Heller, 1862 and herein tentatively referred to as A. cf. lobidens. The material herein examined strongly supports the validity of A. inopinatus based on several morphological characters, as well as differences in the colour pattern, compared to other members of the A. lobidens complex.
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PESCINELLI, RÉGIS A., JOÃO A. F. PANTALEÃO, FERNANDO L. MANTELATTO, and ROGÉRIO C. COSTA. "Morphological description of early zoeal stages of Alpheus brasileiro Anker, 2012 reared in the laboratory, including a revision of the larval morphology of the first zoeal stage of the genus Alpheus Fabricius, 1798 (Caridea: Alpheidae)." Zootaxa 4269, no. 2 (May 22, 2017): 265. http://dx.doi.org/10.11646/zootaxa.4269.2.5.

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The aims of this study were to describe and illustrate the early larval stages of the snapping shrimp Alpheus brasileiro Anker, 2012 and to review the larval morphology (Zoea I) of the genus Alpheus Fabricius, 1798. Larvae were obtained from two females with embryos collected in an intertidal estuary in Cananéia, São Paulo state, Brazil. The published descriptions of all available Alpheus zoea I (only 14 spp., 4.7%) were used for a comparison of larval morphology. The zoeae I of Alpheus species are very similar, but A. brasileiro can be separated from the other studied species by the following set of characteristics: antennal scale 5-segmented with 11 plumose setae and 2 simple setae; coxal endite of maxillule with 3 simple setae and 2 sparsely plumose setae; and coxal endite of maxilla with 1 simple seta and 1 sparsely plumose seta. The description of early larval development of A. brasileiro indicates consistent characteristics, which, when analyzed along with other morphological, molecular, and biogeographical aspects, can help to elucidate the complex phylogenetic relationships between the species in the group. However, this is the first zoeal description of a member of Alpheus armillatus species complex and it therefore does not permit a comparison. Only with new additional descriptions we will be able to generate a clearer scenario in this field due the high similarity among the species.
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Fu, Michael C. "Simulation-Based Algorithms for Markov Decision Processes: Monte Carlo Tree Search from AlphaGo to AlphaZero." Asia-Pacific Journal of Operational Research 36, no. 06 (December 2019): 1940009. http://dx.doi.org/10.1142/s0217595919400098.

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AlphaGo and its successors AlphaGo Zero and AlphaZero made international headlines with their incredible successes in game playing, which have been touted as further evidence of the immense potential of artificial intelligence, and in particular, machine learning. AlphaGo defeated the reigning human world champion Go player Lee Sedol 4 games to 1, in March 2016 in Seoul, Korea, an achievement that surpassed previous computer game-playing program milestones by IBM’s Deep Blue in chess and by IBM’s Watson in the U.S. TV game show Jeopardy. AlphaGo then followed this up by defeating the world’s number one Go player Ke Jie 3-0 at the Future of Go Summit in Wuzhen, China in May 2017. Then, in December 2017, AlphaZero stunned the chess world by dominating the top computer chess program Stockfish (which has a far higher rating than any human) in a 100-game match by winning 28 games and losing none (72 draws) after training from scratch for just four hours! The deep neural networks of AlphaGo, AlphaZero, and all their incarnations are trained using a technique called Monte Carlo tree search (MCTS), whose roots can be traced back to an adaptive multistage sampling (AMS) simulation-based algorithm for Markov decision processes (MDPs) published in Operations Research back in 2005 [Chang, HS, MC Fu, J Hu and SI Marcus (2005). An adaptive sampling algorithm for solving Markov decision processes. Operations Research, 53, 126–139.] (and introduced even earlier in 2002). After reviewing the history and background of AlphaGo through AlphaZero, the origins of MCTS are traced back to simulation-based algorithms for MDPs, and its role in training the neural networks that essentially carry out the value/policy function approximation used in approximate dynamic programming, reinforcement learning, and neuro-dynamic programming is discussed, including some recently proposed enhancements building on statistical ranking & selection research in the operations research simulation community.
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PASINATTO, KARMINE, FERNANDO L. MANTELATTO, and MARIANA TEROSSI. "First zoeal stage of the snapping shrimps Alpheus formosus Gibbes, 1850 and Alpheus malleator Dana, 1852 (Caridea: Alpheidae), with new characters to the genus." Zootaxa 4820, no. 3 (July 29, 2020): 540–50. http://dx.doi.org/10.11646/zootaxa.4820.3.7.

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The first zoeae of Alpheus formosus Gibbes, 1850 and Alpheus malleator Dana, 1852 are described and illustrated for the first time, based on laboratory-hatched larvae from parental females sampled in Vitória Island, Ubatuba, Brazil. Both species shared many characters with other species of genus Alpheus Fabricius, 1798, but they also have some exclusive characters as 10 setae on the basis of the maxilla, first maxilliped with endopod 2-segmented and exopod 4-segmented, second maxilliped with exopod 4-segmented, presence of bud only of the first pereopod, presence of anal spine and simple dorsal setae on the pleon. The zoea I of both species, nevertheless, can be separated by segmentation in the exopod of the antenna (8 in A. formosus, 6 in A. malleator); segmentation in the endopod and exopod of the third maxilliped (5 in A. formosus and 4 in A. malleator); peduncle of antennule 3-segmented in A. formosus (unsegmented or 2-segmented in other species) and presence of a medial tubercle in the proximal segment in the exopod of the antenna of A. malleator (absent in A. formosus, not reported in all other species). In this study three new characters are proposed to be analyzed in zoea of the genus Alpheus: presence of anal spine in both species (absent in Alpheus saxidomus Holthuis, 1980, but not reported in other species) and for the first time reported, presence of a tubercle in the exopod of the antenna (present only in A. malleator) and presence of simple dorsal setae on the pleon (both species), here analyzed under light and scanning electron microscopy.
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ANKER, ARTHUR. "On two new deep-water snapping shrimps from the Indo-West Pacific (Decapoda: Alpheidae: Alpheus)." Zootaxa 4845, no. 3 (September 3, 2020): 393–409. http://dx.doi.org/10.11646/zootaxa.4845.3.5.

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Two new deep-water species of the snapping shrimp genus Alpheus Fabricius, 1798 are described based on the material collected by the expeditions BIOPAPUA, BOA1 and MIRIKY, organised by the Muséum National d’Histoire Naturelle in Paris. Alpheus alaincrosnieri n. sp. from the A. brevirostris (Olivier, 1811) group is described based on material dredged at depths of 198–408 m near the coasts of Papua New Guinea, Vanuatu and Madagascar. This species also occurs in the Philippines, based on morphological characters of a mutilated specimen from Masbate reported by Chace (1988). Alpheus alaincrosnieri n. sp. is unique within the A. brevirostris group, in having small orbital teeth. In most other features, A. alaincrosnieri n. sp. is morphologically closest to A. kagoshimanus Hayashi & Nagata, 2000, A. longipalma Komai & Ohtomi, 2018, A. macroskeles Alcock & Anderson, 1894, A. nonalter Kensley, 1969 and A. acutocarinatus De Man, 1909. Alpheus vanuatu n. sp. is described based on several specimens dredged at depths of 231–331 m off Espirito Santo, Vanuatu. This species most likely represents a deep-water member of the newly defined A. paracrinitus species group, sharing most morphological characters with A. tenuipes De Man, 1910 and A. labis Banner & Banner, 1982.
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ANKER, ARTHUR. "Revision of the western Atlantic members of the Alpheus armillatus H. Milne Edwards, 1837 species complex (Decapoda, Alpheidae), with description of seven new species." Zootaxa 3386, no. 1 (July 12, 2012): 1. http://dx.doi.org/10.11646/zootaxa.3386.1.1.

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The western Atlantic members of the Alpheus armillatus H. Milne Edwards, 1837 species complex, which includes someof the largest and most common intertidal snapping shrimps, are revised based on extensive fresh material collected in theCaribbean Sea, Florida, Gulf of Mexico, Brazil, as well as some older museum material. Alpheus armillatus (sensu H.Milne Edwards 1837 and Coutière 1899) is redescribed based primarily on the Caribbean material and a neotype fromAruba is designated. Alpheus lancirostris Rankin, 1900 and A. verrilli (Schmitt, 1924) are resurrected from the synonymyof A. armillatus and rediagnosed. Alpheus angulosus McClure, 2002 is redefined and reported from several new localities;its presence in Brazil is confirmed. Seven species are described as new: A. amarillo sp. nov. (Caribbean, southern Florida,Gulf of Mexico), A. punctatus sp. nov. (Caribbean, southern Florida), A. tampensis sp. nov. (western Florida), A. carlaesp. nov. (Caribbean, Florida, Brazil), A. mathewsae sp. nov. (Caribbean, Florida), A. brasileiro sp. nov. (Brazil), and A.nuno sp. nov. (Mexico). In addition, A. viridari (Armstrong, 1949), a close relative and presumed sister lineage of the A.armillatus complex, is rediagnosed and its distinguishing features are highlighted. All species are abundantly illustrated,including variation of some morphological features and colour patterns. A character table and a key to the western Atlantic species of the A. armillatus complex are provided.
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ANKER, ARTHUR. "On two snapping shrimps, Alpheus baccheti n. sp. and A. coetivensis Coutière from the Tuamotu Islands, French Polynesia (Crustacea, Decapoda)." Zootaxa 2492, no. 1 (June 2, 2010): 49. http://dx.doi.org/10.11646/zootaxa.2492.1.3.

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The present study deals with two species of the snapping shrimp genus Alpheus Fabricius, 1798 recently collected on a shallow reef flat of Makemo, central Tuamotu Islands, French Polynesia. Alpheus baccheti n. sp., is described on the basis of a single complete male specimen (holotype). The new species appears to be most closely related to the species of the A. lobidens de Haan, 1849 and A. strenuus Dana, 1852 species complexes, but can be easily distinguished from all of them by the presence of a distoventral tooth on the merus of the third and fourth pereiopods. The presence of Alpheus coetivensis Coutière, 1908 in the Tuamotu Islands is confirmed on the basis of several specimens from Makemo; some taxonomic remarks are provided for this species. The diagnostic colour patterns are illustrated for both A. baccheti n. sp. and A. coetivensis.
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THANGARAJ, Muthusamy. "Phylogenetic assessment and in silico characterization of cytochrome b protein of three alpheid shrimps." Notulae Scientia Biologicae 14, no. 1 (March 14, 2022): 11202. http://dx.doi.org/10.15835/nsb14111202.

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Cytochrome b (cyt b) is one of the cytochrome proteins involved in electron transport in the respiratory chain of mitochondria. Cyt b is the only gene among the cytochrome complex coded by mitochondrial DNA. It is the most widely used gene for phylogenetic assessment and inter species variation studies. Here, the amino acid sequence of cyt b in three snapping shrimps such as, Alpheus lobidens, A. randali, A. bellulus was analysed and the results showed higher similarity in A. lobidens and A. randali as reflected in the phylogenetic tree. This study describes the applications of bioinformatics tools to predict the physico-chemical characters of cyt b protein. This protein was composed of least percentage of Cys (0.8%) and highest percentage of Leu (13.8%). The maximum molecular weight (MW) was predicted as 42.62 KDa in A. randali. The theoretical pI value was ranged from 8.35 to 8.36 and confirmed that cyt b was alkali in nature. The instability index value was in the range of 42.29 to 46.94 which showed the protein was more stable. The secondary structure of this protein was primarily composed of α-helixes and random coil, revealing the stable structure. The comparative modelling was performed by Swiss model where the 3-D crystal structure of bovine cyt bc1 (6haw1.c) was used as template. Ramachandran plot analysis showed that most of the amino acids (>92%) falling on the favoured region. Seven conserved motifs were identified by MEME analysis. The modelled 3-D structure of this protein was validated by PROCHECK and QMEAN. The transmembrane protein topology and helix probability curve was predicted by TMHMM server. Protein-protein interactions was analysed by STRING tool and found the network of cyt b with related proteins. The results of this study may provide valuable insights into fundamental characteristics of cyt b in Alpheid shrimps.
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SCIOLI, JUSTIN A., and ARTHUR ANKER. "Description of Alpheus gallicus, a new deep-water snapping shrimp from Galicia Bank, northeastern Atlantic (Malacostraca, Decapoda, Alpheidae)." Zootaxa 4731, no. 3 (February 7, 2020): 347–58. http://dx.doi.org/10.11646/zootaxa.4731.3.4.

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A new species of the snapping shrimp genus Alpheus Fabricius, 1798 is described based on material from Galicia Bank, an offshore seamount off northwestern Spain. The type series of Alpheus gallicus n. sp. was collected at a depth of 768–785 m, making it one of the deepest occurring snapping shrimps. The new species belongs to the Alpheus macrocheles species group and is morphologically most similar to several deep-water members of this group, viz. A. lentiginosus Anker & Nizinski, 2011, A. platydactylus Coutière, 1897, A. romensky Burukovsky, 1990, as well as to the shallow-water A. macrocheles (Hailstone, 1835). The new species can be distinguished from all of them by some features on the minor cheliped and dactyli of the third to fifth pereiopods. In addition to morphology, DNA barcoding of the COI gene distinguished A. gallicus n. sp. from all related species with available barcode sequences.
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Tracey, E., A. Pereira, M. Hughes, and C. A. Korey. "The embryonic development of the snapping shrimp, Alpheus angulosus McClure, 2002 (Decapoda, Caridea)." Crustaceana 86, no. 11 (2013): 1367–81. http://dx.doi.org/10.1163/15685403-00003235.

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Alpheus angulosus McClure, 2002 is one of several species of snapping shrimp that live along the east coast of the United States and belong to the edwardsii group of Alpheus. The genus Alpheus presents with bilateral asymmetry in their chelipeds, specifically a large snapper and a smaller pincer. This is an extreme example of the asymmetry found in many other crustaceans. A significant amount of work has been done on the adult behavior, physiology, and transformation/regeneration of the two claws, but less is known about the early development of the nervous system that underlies this asymmetry. The work reported here begins to establish an atlas of embryonic development in this species staged by using both eye index and percent development connected to yolk depletion during embryogenesis. This represents the first step toward a more comprehensive understanding of embryonic development that can be used to address future neuro-developmental questions regarding limb asymmetry and plasticity.
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Bruce, A. J. "Alpheus fenneri sp. nov. and a. Wiluamsi sp. nov., two new Indo-west Pacific alpheid shrimps of the brevirostris species group." Beagle : Records of the Museums and Art Galleries of the Northern Territory 11 (November 1994): 15–28. http://dx.doi.org/10.5962/p.264023.

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DE GRAVE, SAMMY, APSARA S. KRISHNAN, ANIL KUMAR K. P., and MAGDALINI CHRISTODOULOU. "A new species of Alpheus (Crustacea, Decapoda, Alpheidae) from the Arabian Sea, Kerala, India." Zootaxa 4750, no. 2 (March 11, 2020): 277–85. http://dx.doi.org/10.11646/zootaxa.4750.2.11.

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A new species of Alpheus, A. samudra nov. sp., is described from the bycatch of trawlers operating between 275–375 m depth on the Quilon Bank (Kerala, India). The new species belongs to the brevirostris group, but can be easily distinguished from all but one species, by the extremely laterally compressed major cheliped. Alpheus samudra nov. sp. is very similar to A. leptocheles Banner & Banner, 1975 in the form of the major cheliped, but the proportions of the fingers to the palm and the shape of the fingers easily separate both species.
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Guchardi, J. A., and C. K. Govind. "Vascular supply to bilaterally asymmetric chelae in crustaceans." Canadian Journal of Zoology 68, no. 5 (May 1, 1990): 1062–64. http://dx.doi.org/10.1139/z90-155.

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Blood vessels to the paired hemiganglia and chelae were examined in several crustacean species with bilaterally asymmetric, major and minor, chelae. The network of vessels was qualitatively similar between the paired chelae hemiganglia in Alpheus, Carcinus, Homarus, and Uca. The principal vessel supplying the chela was also similar in size on the two sides, except in the fiddler crab and snapping shrimp where the vessel was larger on the major side. Reversal of chela asymmetry in Alpheus entails a reversal in vessel size denoting plasticity of adult vascular tissue.
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AL-KANDARI, MANAL, ARTHUR ANKER, SUMAIAH HUSSAIN, ZAINAB SATTARI, and SAMMY DE GRAVE. "New records of decapod crustaceans from Kuwait (Malacostraca: Decapoda)." Zootaxa 4803, no. 2 (June 26, 2020): 251–80. http://dx.doi.org/10.11646/zootaxa.4803.2.2.

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Seventeen species of shrimp-like decapod crustaceans (infraorders Caridea, Axiidea and Gebiidea) and two species of porcelain crabs (infraorder Anomura) are recorded for the first time from Kuwait, some of them also representing new records for the Arabian Gulf. The new records from Kuwait are: (1) Alpheus edamensis De Man, 1888; (2) Alpheus edwardsii (Audouin, 1826); (3) Alpheus macrodactylus Ortmann, 1890; (4) Alpheus maindroni Coutière, 1898; (5) Arete indicus Coutière, 1903; (6) Athanas parvus De Man, 1910; (7) Synalpheus gracilirostris De Man, 1910 [all Alpheidae]; (8) Latreutes mucronatus (Stimpson, 1860) [Hippolytidae]; (9) Thor paschalis (Heller, 1862) [Thoridae] (10) Periclimenella pettithouarsii (Audouin, 1826); (11) Anchistus custos (Forskål, 1775); (12) Urocaridella pulchella Yokes & Galil, 2006 [all Palaemonidae]; (13) Chlorocurtis jactans (Nobili, 1904) [Chlorotocellidae]; (14) Upogebia carinicauda (Stimpson, 1860); (15) Upogebia octoceras Nobili, 1904 [Upogebiidae]; (16) Balsscallichirus masoomi (Tirmizi, 1970), (17) Michaelcallianassa indica Sakai, 2002 [Callianassidae]; (18) Raphidopus persicus Ng, Safaie & Naser, 2012 and Polyonyx obesulus Miers, 1884 [Porcellanidae]. Most of these taxa have been previously recorded from other parts of the Arabian Gulf, mainly from the coasts of Iran and the United Arab Emirates, except for A. maindroni and U. pulchella, which are recorded from the Arabian Gulf for the first time. Most species are shown in colour photographs, some for the first time. In addition, the presence of Synalpheus quinquedens Tattersall, 1921 (Alpheidae), previously known from Kuwait based only on a questionable record in a popular field guide, is confirmed based on a single collected and preserved specimen.
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Hendrickx, Michel E., and Betel Martínez-Guerrero. "Four New Records of Caridean Shrimps (Decapoda: Palaemonidae, Alpheidae) in Mexican Pacific Waters." Crustaceana 84, no. 9 (2011): 1111–15. http://dx.doi.org/10.1163/001121611x584325.

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AbstractNew records are provided for four species of caridean shrimp (Alpheidae and Palaemonidae) from Sonora, Sinaloa, and Oaxaca, along the west coast of Mexico. Alpheus tenuis Kim & Abele, 1988 extends its northern range to Puerto Peñasco, Sonora. Alpheus martini Kim & Abele, 1988 is recorded for the first time outside of Panama (Alcatraz Island, Sonora). Pontonia simplex Holthuis, 1951 is recorded from Teacapan, Sinaloa, in the pen shell Atrina maura (Sowerby, 1835), which constitutes a new host record; additionally, its live colour pattern is described. The range of Pontonia margarita Smith, 1869 is extended along the Mexican coast south to Oaxaca.
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41

Cunha, Andressa Maria, Mariana Terossi, Fernando Luis Mantelatto, and Alexandre Oliveira Almeida. "Genetic variation and cryptic diversity of the." Marine and Freshwater Research 73, no. 3 (November 22, 2021): 319–27. http://dx.doi.org/10.1071/mf21043.

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Alpheus lobidens sensu lato is one of the most common groups of snapping shrimps in the Indo-West Pacific. The objective of this study was to investigate the phylogenetic relationships among lineages of A. lobidens s.l. throughout their geographical distribution and identifying possible morphological characteristics that support the lineages from this combined dataset. Molecular data were obtained by analysing 16S rRNA from nine individuals of A. lobidens, three of A. buckupi, one of A. inopinatus and six other Alpheus species. The genetic analyses (mean p-distance and Bayesian Inference) indicate considerable genetic divergence and at least nine lineages within the A. lobidens species complex. The high morphological variability observed in Alpheus spp. and the high rates of interspecific genetic divergence agree with the Marine Ecoregions of the World and ocean currents, which suggests limited gene flow among those lineages, indicating that these could be treated as new species. However, as no informative morphological characters were identified, describing the six new taxa of the complex recognised in this study was unfeasible. Future studies using a higher number of specimens and applying more sensitive methods for detecting structural differences, might help morphologically define the new species that were uncovered herein.
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Pires, Marcus A. B., Fernando A. Abrunhosa, and Cristiana R. Maciel. "Early larval development in the laboratory of Alpheus estuariensis (Crustacea: Caridea) from the Amazon Region." Revista Brasileira de Zoologia 25, no. 2 (June 2008): 199–205. http://dx.doi.org/10.1590/s0101-81752008000200006.

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Here we describe and illustrate in detail four early zoeal stages of Alpheus estuariensis Christoffersen, 1984 from larvae reared in the laboratory. Two ovigerous females were collected in the tidal creek of the Bragança estuary, state of Pará, northeastern Brazil. After hatching, the larvae were placed in small containers (with 10 larvae in each). Females were deposited in the Museu Paraense Emilio Goeldi (MPEG 0803) and the larvae of each larval stage in the Zoological Museum of São Paulo University (MUSP18452). Ten larvae and exuviae were dissected with fine needles under an ocular microscope. Morphological comparisons with previous studies on larval development of the Alpheus species are briefly discussed.
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ANKER, ARTHUR, CARLA HURT, and NANCY KNOWLTON. "Revision of the Alpheus websteri Kingsley, 1880 species complex (Crustacea: Decapoda: Alpheidae), with revalidation of A. arenensis (Chace, 1937)." Zootaxa 1694, no. 1 (January 31, 2008): 51. http://dx.doi.org/10.11646/zootaxa.1694.1.3.

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The Alpheus websteri Kingsley, 1880 species complex is revised. Alpheus websteri s. str. is redefined and restricted to the western Atlantic, ranging from the type locality in the Florida Keys to northeastern Brazil. The eastern Pacific A. arenensis (Chace, 1937), formerly a synonym of A. websteri, and the eastern Atlantic A. fagei Crosnier and Forest, 1966, are shown to be distinct from A. websteri morphologically, genetically and also by color pattern. Morphology, genetics and color patterns all suggest that A. websteri and A. arenensis are transisthmian sister species, with A. fagei being their closest relative. Complete synonymy, color photographs and GenBank barcodes (COI) are provided for all three species.
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44

Hoffmann, Leah. "Playing with, and against, computers." Communications of the ACM 64, no. 9 (September 2021): 120. http://dx.doi.org/10.1145/3474361.

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45

Wilan, Ken. "Profile: Alpheus Bingham." Nature Biotechnology 25, no. 10 (October 2007): 1072. http://dx.doi.org/10.1038/nbt1007-1072.

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46

Murphy, Walter F. "Alpheus Thomas Mason." PS: Political Science & Politics 23, no. 01 (March 1990): 71–73. http://dx.doi.org/10.1017/s104909650003239x.

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47

Lampert, Jay. "Deleuze and AlphaGo." Deleuze and Guattari Studies 17, no. 1 (February 2023): 27–54. http://dx.doi.org/10.3366/dlgs.2023.0501.

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It is time to update Deleuze and Guattari's contrast between Chess and Go in the ‘Nomadology’ Plateau with a discussion of AlphaGo, the artificial intelligence that revolutionised Go in 2016. I focus less on the political issues in Go nomadology, central as they are, and more on smooth space and time. I explain and speculate on some details in Go strategy, as well as some processes of machine learning. The relations between human Go, computer Go, and smooth-time nomadology remain unsettled, in my view, but many resources for nomadological analysis open up for readers who learn to play, and program, Go.
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48

M.A. Fomin, L.E. Klyachkin, A.M. Malyarenko, V.V. Romanov, and N.T. Bagraev. "Magnetic properties of edge channels of silicon nanosandwich structures with deposited DNA oligonucleotides." Technical Physics 92, no. 7 (2022): 798. http://dx.doi.org/10.21883/tp.2022.07.54474.5-22.

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Measurements of the field dependences of the static magnetic susceptibility demonstrate de Haas-Van Alphen and Aharonov-Bohm oscillations at high temperatures and low magnetic fields in silicon nanosandwich structures (SNS). In the case of the deposition of DNA oligonucleotides into the edge channels of the SNS, a change in the oscillation period is observed. The possibilities of using the obtained data to identify the properties of DNA oligonucleotides are discussed. Keywords: THz radiation, DNA identification, de Haas-Van Alphen, Aharonov-Bohm.
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49

ANKER, ARTHUR. "Description of two new species of goby-associated snapping shrimps from the tropical western Pacific (Decapoda: Alpheidae: Alpheus)." Zootaxa 5092, no. 3 (January 20, 2022): 273–90. http://dx.doi.org/10.11646/zootaxa.5092.3.2.

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Two new snapping shrimps associated with gobies are described from the tropical waters of the western Pacific. Alpheus thompsoni sp. nov. is described based on a single adult female from Madang, Papua New Guinea. Alpheus sciolii sp. nov. is described based on several specimens of both sexes from the Solomon Islands, Australia and Vietnam. Both species are part of a larger species complex, which also includes A. djeddensis Coutière, 1897, A. djiboutensis De Man, 1909, A. bellulus Miya & Miyake, 1969, A. macellarius Chace, 1988, A. fenneri Bruce, 1994 and A. mannarensis Purushothaman, Abhilash, Kumar & Lal, 2021, but can be distinguished from each of them by a combination of morphological characters, and from the latter four species also by the very different colour patterns.
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50

Boltaña, S., and M. Thiel. "Associations between two species of snapping shrimp, Alpheus inca and Alpheopsis chilensis (Decapoda: Caridea: Alpheidae)." Journal of the Marine Biological Association of the United Kingdom 81, no. 4 (August 2001): 633–38. http://dx.doi.org/10.1017/s0025315401004295.

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This study examined the association pattern of two snapping shrimp species that inhabit burrows at exposed rocky shores of the Chilean Pacific coast. The two species Alpheus inca and Alpheopsis chilensis were frequently found to share the same burrows. In most burrows an heterosexual pair of each species was found. A strong positive correlation between the body length of female and male conspecifics cohabiting in a burrow was found both for Alpheus inca and for Alpheopsis chilensis. Similarly, a positive correlation existed between the mean body length of Alpheus inca and that of Alpheopsis chilensis occurring together in one burrow. Thus, a size-relationship between burrow cohabitants exists both in the intra-specific as well as in the inter-specific association of these shrimps. Most females, regardless of their reproductive stage, were accompanied by males. Within a particular burrow, females of the two species often were in the same reproductive stage, i.e. both were with embryos in a similar developmental stage, or both were without embryos. These data suggest that male and female conspecifics, as well as the pairs of the two species, remain together in the same burrow for relatively long time periods. It is proposed that the intra-specific communication system of snapping shrimp facilitates the development of inter-specific associations, such as the one reported herein.
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