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Relevant bibliographies by topics / Gonopore

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Academic literature on the topic 'Gonopore'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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Journal articles on the topic "Gonopore"

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Nakano, Takafumi. "Holotype redescription of Mimobdella japonica (Hirudinida, Arhynchobdellida, Erpobdelliformes) and taxonomic status of the genus Mimobdella." ZooKeys 119 (July 15, 2011): 1–10. https://doi.org/10.3897/zookeys.119.1501.

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<i>Mimobdella</i> <i>japonica</i> Blanchard, 1897, the type species of the genus <i>Mimobdella</i>, is redescribed based on the holotype. This species is characterized by the following characteristics: mid-body somites novem-annulate, two post-anal annuli, male gonopore in XI/XII, female gonopore in XII/XIII, 9 annuli (one full somite) between gonopores, strepsilaematous pharynx and three myognaths with stylets, possessing post-crop caeca in pairs, ovisacs reaching to XXI a2. The genus <i>Mimobdella</i> is placed under the family Salifidae, not Gastrostomobdellidae or Erpobdellidae, according

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Nakano, Takafumi. "A new species of Orobdella (Hirudinida, Arhynchobdellida, Gastrostomobdellidae) and redescription of O. kawakatsuorum from Hokkaido, Japan with the phylogenetic position of the new species." ZooKeys 169 (February 10, 2012): 9–30. https://doi.org/10.3897/zookeys.169.2425.

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A new quadrannulate <i>Orobdella</i> Oka, 1895 species, <i>Orobdella</i> <i>koikei</i> <strong>sp. n.</strong>, is described on the basis of six specimens collected from Hokkaido, Japan. In addition, an emended description of quadrannulate <i>Orobdella</i> <i>kawakatsuorum</i> Richardson, 1975 is also provided. <i>Orobdella</i> <i>koikei</i> differs from other quadrannulate species of <i>Orobdella</i> in possessing the following combination of characters: color dorsally brown, IV uniannulate, male gonopore at XI b6, gastropore and female gonopore at XIII a1, 1/2 + 4 + 1/2 between gonopores, XX

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Nakano, Takafumi, and Yi-Te Lai. "A new species of Orobdella (Hirudinida, Arhynchobdellida, Orobdellidae) from Taipei, Taiwan." ZooKeys 207 (July 11, 2012): 49–63. https://doi.org/10.3897/zookeys.207.3334.

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A new quadrannulate species of <i>Orobdella</i>, <i>Orobdella</i> <i>ketagalan</i> sp. n., from Taipei, Taiwan, is described. This is the first record of <i>Orobdella</i> and the family Orobdellidae from Taiwan. This new species possesses small, paired sperm duct bulbs in the male reproductive system. In addition to these bulbs, the following combination of characters distinguishes this new species from other quadrannulate species: somite IV uniannulate, male gonopore at XI b6, female gonopore at XIII a1, 1/2 + 4 + 1/2 between gonopores, simple tubular gastroporal duct, lacking epididymides, a

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Nakano, Takafumi. "A new sexannulate species of Orobdella (Hirudinida, Arhynchobdellida, Orobdellidae) from Yakushima Island, Japan." ZooKeys 181 (April 6, 2012): 79–93. https://doi.org/10.3897/zookeys.181.2932.

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A new sexannulate species of the genus <i>Orobdella</i> Oka, 1895, <i>Orobdella</i> <i>mononoke</i> sp. n., is described on the basis of five specimens collected from Yakushima Island, Japan. <i>Orobdella</i> <i>mononoke</i> sp. n. differs from other sexannulate <i>Orobdella</i> species in its possessing the following combination of characters: dorsal surface bicolor in life, I–XIII, XXVII and caudal sucker grayish purple, XIV–XXVI amber, male gonopore at XI c11/c12, female gonopore at XIII b2, 8 + 1/2 between gonopores, tubular but bulbous at junction with crop gastroporal duct, epididymides

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Smith, Ian M. "DESCRIPTION OF TWO NEW SPECIES OF PLATYHYDRACARUS GEN. NOV. FROM WESTERN NORTH AMERICA, WITH REMARKS ON CLASSIFICATION OF ATHIENEMANNIIDAE (ACARI: PARASITENGONA: ARRENUROIDEA)." Canadian Entomologist 121, no. 8 (1989): 709–26. http://dx.doi.org/10.4039/ent121709-8.

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AbstractLarvae, deutonymphs, and male and female adults of Platyhydracarus juliani sp.nov., and adults of P. parvipalpis sp.nov., are described from rheocrenes and small streams in western North America. The genus Platyhydracarus gen.nov. is proposed and diagnosed, based primarily upon the presence of genital acetabula both in the gonopore and on acetabular plates flanking the gonopore, and of a group of thickened setae anterior to the gonopore, in male adults. Possible relationships between Platyhydracarus and other Athienemanniidae are discussed, and a new key to the genera of Athienemanniin

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YIN, ZIHAN, JINPING LIAO, LINBEI LI, et al. "A new species of Odontobdella Oka, 1923 (Erpobdelliformes: Salifidae), a macrophagous terrestrial leech from Central China." Zootaxa 5566, no. 1 (2025): 159–72. https://doi.org/10.11646/zootaxa.5566.1.7.

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This paper describes a new species of macrophagous terrestrial leech distributed in Wuling Mountain area in Central China. On the basis of morphological and structural observation, mitochondrial cytochrome c oxidase subunit I (COI) gene sequence analysis and phylogenetic tree inference, this leech was identified as a new species of the genus Odontobdella in the family Salifidae, and named Odontobdella gaowangjiensis sp. nov. The main distinguishing features are: mid-body somites decem-annulate, c1 = c2 = c3 = c4 < b3 = b4 < c9 = c10 > c11 = c12 in adults, while in juvenile specimens,

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Payne, Robyn P., Charles L. Griffiths, der Heyden Sophie von, and Erich Koch. "The cushion–star Parvulastra exigua in South Africa: one species or more?" ZooKeys 524 (September 30, 2015): 1–16. https://doi.org/10.3897/zookeys.524.6145.

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The cushion–star Parvulastra exigua (Lamarck, 1816) is a widely distributed member of the temperate intertidal fauna in the southern hemisphere. In South Africa, it occurs in sympatry with the endemic Parvulastra dyscrita (Clark, 1923), the two species being differentiated predominantly by gonopore placement. Several recent studies have suggested that there may be additional cryptic species within the P. exigua complex in South Africa, based variously on color morphology, genetic evidence and the differential placement of the gonopores. This paper attempts to resolve whether one or more specie

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Huang, Chao, Hsi-Te Shih, and Shane T. Ahyong. "The freshwater crab genus Lacunipotamon Dai, Song, He, Cao, Xu & Zhong, 1975 (Decapoda, Brachyura, Potamidae), with descriptions of two new species from southwestern China." Crustaceana 93, no. 11-12 (2020): 1361–79. http://dx.doi.org/10.1163/15685403-bja10067.

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Abstract The poorly known genus Lacunipotamon Dai, Song, He, Cao, Xu & Zhong, 1975, is studied and reviewed. Two new species, Lacunipotamon yuanshi sp. nov. and Lacunipotamon cymatile sp. nov. from Yunnan Province and Guangxi Zhuang Autonomous Region, respectively, are described based on morphology and mitochondrial cytochrome c oxidase subunit I (COI) sequences. Both superficially resemble Lacunipotamon albusorbitum Dai, Song, He, Cao, Xu & Zhong, 1975, the type and previously only known species in the genus, but can be distinguished by the combination of live colour, size, maxilliped

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Liu, Hai-Long, Da-Hao Lin, An-Tai Wang, Zhang-Li Hu, and Yu Zhang. "Description of a new marine flatworm of Prosthiostomum (Platyhelminthes, Polycladida, Prosthiostomidae) from the South China Sea." Zoosystematics and Evolution 100, no. 2 (2024): 437–45. http://dx.doi.org/10.3897/zse.100.114482.

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A new species of the polyclad genus Prosthiostomum is described from the intertidal zone of the South China Sea, Huidong, China, based on morphological and molecular analyses. Prosthiostomum huidongensesp. nov. is characterized by i) few marginal eyes scattered between the marginal band and the cerebral eyes; ii) sucker located at two-thirds of the body length, being removed from the female gonopore by twice the distance between the male and female gonopores; iii) shallow male atrium with slightly ruffled inner wall, positioned approximately perpendicular to the body wall. Molecular phylogenet

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Liu, Hai-Long, Da-Hao Lin, An-Tai Wang, Zhang-Li Hu, and Yu Zhang. "Description of a new marine flatworm of Prosthiostomum (Platyhelminthes, Polycladida, Prosthiostomidae) from the South China Sea." Zoosystematics and Evolution 100, no. (2) (2024): 437–45. https://doi.org/10.3897/zse.100.114482.

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A new species of the polyclad genus <i>Prosthiostomum</i> is described from the intertidal zone of the South China Sea, Huidong, China, based on morphological and molecular analyses. <i>Prosthiostomum huidongense</i> sp. nov. is characterized by i) few marginal eyes scattered between the marginal band and the cerebral eyes; ii) sucker located at two-thirds of the body length, being removed from the female gonopore by twice the distance between the male and female gonopores; iii) shallow male atrium with slightly ruffled inner wall, positioned approximately perpendicular to the body wall. Molec

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Dissertations / Theses on the topic "Gonopore"

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Jones, AnnMarie. "Population Dynamics of Dakoticancer overanus from the Pierre Shale, South Dakota." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1384772692.

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Kienbaum, Katja. "Evolutionary transformations of the reproductive system in Eubrachyura (Crustacea: Decapoda)." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20144.

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Die Brachyura umfassen ca. 7000 Arten. Die Variationsbreite ihrer morphologischen Merkmale spiegelt sich in den männlichen und weiblichen Reproduktionssystemen wider und machen sie zu einem herausfordernden Untersuchungsgegenstand. Obwohl sich zahlreiche Studien mit der Phylogenie der Brachyura befasst haben, fehlen eindeutige Ergebnisse. Manche Studien stützen sich weiterhin auf deren Teilung in die Podotremata, die Heterotremata und die Thoracotremata (die beiden letzteren bilden die Eubrachyura), die auf der Position der Gonoporen basiert. In dieser Arbeit wurden die männlichen Kopulations-

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Drago, Leandro. "Non-systemic metamorphosis: millipede gonopods as a model system." Doctoral thesis, Università degli studi di Padova, 2009. http://hdl.handle.net/11577/3426455.

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Arthropod post-embryonic life is characterized by periodical moult cycles. These events are essential during individual growth, given that a rigid exoskeleton wraps them. When a moult event corresponds with a relatively sudden and conspicuous change in animal’s structure, is called metamorphosis; this phenomenon is characterized by a relatively high level of processes like apoptosis and cellular proliferation. For this reason, the study of the processes involved during metamorphosis has become a very important subject in evolutionary developmental biology (evo-devo) of arthropods. The principa

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Pecnik, Simon James. "Phylogenetic Analysis of North American Representatives of the Brachyuran Genus Palicus, With Focus on Gonopod Morphology and Mitochondrial Gene Sequences." Thesis, University of Louisiana at Lafayette, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10163333.

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<p> The brachyuran superfamily Palicoidea &Scaron;tev&ccaron;i&cacute;, 2005, commonly referred to as stilt-crabs, currently includes the families Crossotonotidae Moosa and Seréne, 1981 and Palicidae Bouvier, 1898, consisting of two and nine genera, respectively. Both genus and species level relationships remain largely enigmatic and are based primarily upon highly variable morphological characters. Molecular phylogenetic analyses, based on COI and 16S mitochondrial gene sequences, are used to clarify relationships among primarily western Atlantic species and to independently validate d

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Book chapters on the topic "Gonopore"

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Peck, Stewart B., Carol C. Mapes, Netta Dorchin, et al. "Gonopore." In Encyclopedia of Entomology. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1138.

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Peck, Stewart B., Carol C. Mapes, Netta Dorchin, et al. "Gonopod." In Encyclopedia of Entomology. Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_1137.

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Schram, Frederick R., and Stefan Koenemann. "Cephalocarida." In Evolution and Phylogeny of Pancrustacea. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780195365764.003.0047.

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Cephalocarids have stood in the past as a central group in interpretations of the origins of crustaceomorphs, but recently some authorities have offered alternative hypotheses. Molecular data have suggested a connection with Remipedia in a subclass Xenocarida. Furthermore, xenocaridans emerge in some proximity to the origin of Hexapoda. Cephalocarids are small animals, typically approximately 3 mm in length as adults. The order has eight thoracomeres, with a gonopore on the 6th thoracic somite; a legless abdomen of 11 segments terminates in an anal somite bearing a well-developed pair of tubul

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"gonophore, n." In Oxford English Dictionary, 3rd ed. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/7855094202.

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Semmler Le, Henrike. "Acanthocephala." In Structure and Evolution of Invertebrate Nervous Systems. Oxford University PressOxford, 2015. http://dx.doi.org/10.1093/acprof:oso/9780199682201.003.0014.

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Abstract The nervous system of the 1150 species-containing Acanthocephala is strongly influenced by their parasitic lifestyle. Also known as ‘thorny-headed worms’, these few-centimetre-long animals are endoparasites, having insects or crustaceans as intermediate hosts and vertebrates as final hosts. The basic structural pattern of the nervous system is common to all Acanthocephala. Nevertheless, there are significant differences in numbers of cells and arising nerves from the cerebral ganglion present in the various acanthocephalan groups, i.e. Archiacanthocephala, Eoacanthocephala, and Palaea

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Schram, Frederick R., and Stefan Koenemann. "Remipedia." In Evolution and Phylogeny of Pancrustacea. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780195365764.003.0048.

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Remipedia, or fire shrimp, have a 6-segment head (maxilliped fused with the cephalon even in early stages of development) and extremely long trunks (up to 42 segments, with each segment bearing a pair of biramous limbs). Female gonopores are located on the 7th trunk segment, whereas the male gonopores sit on the 15th trunk segment. The sperm has apical acrosome with a large nucleus that surrounds what looks to be a central perferatorium (as in cephalocaridans). The trunk terminates in an anal somite bearing variably long caudal rami loaded with tegumental glands. The most apomorphic feature is

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Schram, Frederick R., and Stefan Koenemann. "Body Plans." In Evolution and Phylogeny of Pancrustacea. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780195365764.003.0001.

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Pancrustacea is a misnomer; the overwhelming number of species are not crustaceans—they are insects (Hexapoda). But most of the anatomical disparity in this subphylum occurs among the crustaceans. The preferred name would have been Tetraconata, based on an actual diagnostic feature—the presence of four cone cells in their eye ommatidia. The “crustacean” paraphyletic components of the subphylum form the main focus in this book. These form three monophyletic clades. Members of one clade have their gonopores located mid-body, somewhere on the trunk segments 6–8: Malacostraca, Copepoda, Thecostrac

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Schram, Frederick R., and Stefan Koenemann. "Clam Shrimp." In Evolution and Phylogeny of Pancrustacea. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780195365764.003.0045.

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The clam shrimp, once thought to be a single order, are now viewed as three distinct orders within a cohort Diplostraca. Laevicaudata (or the lynceids) have ambiguous features such that they might be either closely related to Calmanostraca or stand as a sister group to a clade containing the rest of the Diplostraca. Lynceus has 11–13 limb-bearing somites in the thorax. Spinicaudata have 11–32 segments depending on the species, but the gonopores open on the 11th trunk somite. Cyclestheriida, however, is a sister taxon to the order Cladocera; it bears 16–18 pairs of trunk limbs in females and 15

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Schram, Frederick R., and Stefan Koenemann. "Cladocera." In Evolution and Phylogeny of Pancrustacea. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780195365764.003.0046.

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The cladocerans, currently thought to contain approximately 630 species, constitute the most speciose and anatomically diverse group within Branchiopoda. Unlike other branchiopods with gonopores located around the 12th thoracic somite, cladocerans are truly oligomerous, with greatly shortened bodies. Cladocerans sort themselves into two general types: swimmers and crawlers. The swimmers typically use the antennae for locomotion, assisted to a greater or lesser degree by the buoyancy of the body. The crawlers live on or in the bottom or on the surface of water plants. There are five subgroups:

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Schram, Frederick R., and Stefan Koenemann. "Are the Crustaceans Monophyletic?" In Assembling the Tree of Life. Oxford University PressNew York, NY, 2004. http://dx.doi.org/10.1093/oso/9780195172348.003.0020.

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Abstract In these times of rampant Tree of Life cultivation, it is perhaps hard to realize that up until 20 years ago the “phylogenetic lawn” of figure 19.1 entailed everything we as carcinologists knew about crustacean relationships. This poorly resolved “twig” was, and to some people still is, a widely excepted consensus that dates back to the 1962 conference on the Phylogeny and Evolution of Crustacea held at the Museum of Comparative Zoology at Harvard (Dahl 1963). Moreover, this was considered state of the art for the field during that period! The situation within the major groups of crus

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Conference papers on the topic "Gonopore"

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Kreshchenko, N. D., and N. B. Terenina. "IDENTIFICATION OF FMRFamide-LIKE NEUROPEPTIDES IN TREMATODES ACROLICHANUS AURICULATUS." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.226-230.

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For the first time, using the immunocytochemical analysis and confocal laser scanning microscopy, we studied the nervous system structure including FMRFamideimmunopositive (FMRFa-ip) nerve elements in trematode Acrolichanus auriculatus (Digenea, Allocreadiidae), an intestinal parasite of sturgeons. The study results revealed FMRFamide staining in the central parts of the nervous system of worms: in neurons and neurites of the cephalic ganglia, cerebral commissure, and three pairs of longitudinal nerve cords. The staining intensity was higher in nerve fibers as compared to the bodies of FMRFa-i

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