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Journal articles on the topic 'Trachylinae'

Author: Grafiati

Published: 4 June 2025

Last updated: 23 June 2025

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1

Collins, Allen G., Bastian Bentlage, Alberto Lindner, et al. "Phylogenetics of Trachylina (Cnidaria: Hydrozoa) with new insights on the evolution of some problematical taxa." Journal of the Marine Biological Association of the United Kingdom 88, no. 8 (2008): 1673–85. http://dx.doi.org/10.1017/s0025315408001732.

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Some of the most interesting and enigmatic cnidarians are classified within the hydrozoan subclass Trachylina. Despite being relatively depauperate in species richness, the clade contains four taxa typically accorded ordinal status: Actinulida, Limnomedusae, Narcomedusae and Trachymedusae. We bring molecular data (mitochondrial 16S and nuclear small and large subunit ribosomal genes) to bear on the question of phylogenetic relationships within Trachylina. Surprisingly, we find that a diminutive polyp form,Microhydrula limopsicola(classified within Limnomedusae) is actually a previously unknown life stage of a species of Stauromedusae. Our data confirm that the interstitial formHalammohydrasp. (Actinulida) is derived from holopelagic direct developing ancestors, likely within the trachymedusan family Rhopalonematidae. Trachymedusae is shown to be diphyletic, suggesting that the polyp stage has been lost independently at least two times within trachyline evolution. Narcomedusae is supported as a monophyletic group likely also arising from trachymedusan ancestors. Finally, some data, albeit limited, suggest that some trachyline species names refer to cryptic species that have yet to be sorted taxonomically.

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2

Toshino, Sho, Miyako Tanimoto, and Ryo Minemizu. "Olindias deigo sp. nov., a new species (Hydrozoa, Trachylinae, Limnomedusae) from the Ryukyu Archipelago, southern Japan." ZooKeys 900 (December 31, 2019): 1–21. http://dx.doi.org/10.3897/zookeys.900.38850.

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A new hydromedusa belonging to the order Limnomedusae is reported from the Ryukyu Archipelago, southern Japan. Olindias deigosp. nov. can be distinguished from other Olindiidae species by the number and color of tentacles. Mature medusae of O. deigosp. nov. were collected to observe the life history, including polyp (hydroid) and medusa formation. A comparative table of the primary diagnostic characters of the genus is provided.

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3

Toshino, Sho, Miyako Tanimoto, and Ryo Minemizu. "Olindias deigo sp. nov., a new species (Hydrozoa, Trachylinae, Limnomedusae) from the Ryukyu Archipelago, southern Japan." ZooKeys 900 (December 31, 2019): 1–21. https://doi.org/10.3897/zookeys.900.38850.

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A new hydromedusa belonging to the order Limnomedusae is reported from the Ryukyu Archipelago, southern Japan. Olindias deigosp. nov. can be distinguished from other Olindiidae species by the number and color of tentacles. Mature medusae of O. deigosp. nov. were collected to observe the life history, including polyp (hydroid) and medusa formation. A comparative table of the primary diagnostic characters of the genus is provided.

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4

Mills, C. E., G. O. Mackie, and C. L. Singla. "Giant nerve axons and escape swimming in Amphogona apicata with notes on other hydromedusae." Canadian Journal of Zoology 63, no. 9 (1985): 2221–24. http://dx.doi.org/10.1139/z85-328.

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The trachyline medusa Amphogona apicata (family Rhopalonematidae) possesses giant axons and other special features previously described in Aglantha digitale and shows similar escape-swimming and slow-swimming responses. A review of the literature and new observations on several species suggest that, with the possible exception of members of the Ptychogastriidae, these locomotory adaptations are peculiar to certain rhopalonematid hydromedusae.

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5

Осадченко, Б. В., та Ю. А. Краус. "TRACHYLINA: ГРУППА, ОСТАВШАЯСЯ ЗАГАДКОЙ ПОСЛЕ 150 ЛЕТ ИЗУЧЕНИЯ, "Онтогенез"". Онтогенез, № 3 (2018): 153–64. http://dx.doi.org/10.7868/s0475145018030023.

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6

Mackie, G. O., Claus Nielsen, and C. L. Singla. "The Tentacle Cilia ofAglantha digitale(Hydrozoa: Trachylina) and their Control." Acta Zoologica 70, no. 3 (1989): 133–41. http://dx.doi.org/10.1111/j.1463-6395.1989.tb01063.x.

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7

Osadchenko, B. V., and Yu A. Kraus. "Trachylina: The Group That Remains Enigmatic Despite 150 Years of Investigations." Russian Journal of Developmental Biology 49, no. 3 (2018): 134–45. http://dx.doi.org/10.1134/s1062360418030074.

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8

Larson, R. J., L. P. Madin, and G. R. Harbison. "In Situ Observations of Deepwater Medusae in the Genus Deepstaria, with a Description of D. Reticulum, Sp. Nov." Journal of the Marine Biological Association of the United Kingdom 68, no. 4 (1988): 689–99. http://dx.doi.org/10.1017/s0025315400028800.

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Medusae are common constituents of the meso-and bathypelagic fauna. Small, transparent trachyline hydromedusae are usually most abundant, but the larger (2–10 cm diameter) pigmented coronate scyphomedusae are often collected in trawl nets (Thurston, 1977; Roe, James & Thurston, 1984; Larson, 1986) or observed from submersibles (Mackie & Mills, 1983; Mackie, 1985; Larson, Madin & Harbison, unpublished observations). Larger (30–70 cm) deep-sea semaeostome scyphomedusae are only infrequently collected in nets (Harbison, Smith & Backus, 1973; Larson, 1986), and would appear to be the rarest forms. For example, Thurston (1977) collected over 16000 midwater medusae in trawls yet he did not report taking a single mesopelagic semaeostome. However, recent investigations using submersibles have shown that these medusae are much more common than net hauls alone would suggest (Smith, 1982).

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9

Singla, C. L., and G. O. Mackie. "Immunogold labelling of FMRFamide-like neuropeptide in neurons of Aglantha digitale (Hydromedusae: Trachylina)." Canadian Journal of Zoology 69, no. 3 (1991): 800–802. http://dx.doi.org/10.1139/z91-116.

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FMRFamide-like neuropeptides have been implicated in transmitter roles in cnidarians. This study was undertaken to determine the ultrastructural distribution of FMRFamide-like immunoreactive material in jellyfish neurons. Immunoreactivity was found to be restricted to large dense cored vesicles. These vesicles were only rarely found at synapses while the small clear vesicles that are found clustered at synapses were not immunoreactive. These results suggest that FMRFamide-like neuropeptides are not released at conventional synapses in cnidarians but at other, unknown sites, and that the synaptic vesicles observed contain a different, presumably fast neurotransmitter.

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10

Dorado, Edgar, and Cristina Cedeño. "Copepods, hydromedusae and siphonophores: Diversity and distribution in the Gerlache Strait, Antarctic Peninsula." Boletín de Investigaciones Marinas y Costeras 50, SuplEsp (2021): 169–86. http://dx.doi.org/10.25268/bimc.invemar.2021.50.suplesp.942.

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Project Biodiversity and oceanographic conditions of the strait of Gerlache “Biogerlache-Antarctica”, aims to carry out the characterization of the Antarctic fauna of the strait, generating new contributions to the biological inventories of Antarctica. Present work focuses on the biodiversity of the zooplanktonic community, specifically on copepods, hydromedusae and siphonophorae collected during the III Antarctic Expedition of Colombia “Admiral Padilla” (2016-2017). Sampling was carried out in seven oceanographic stations located along the Gerlache strait, with vertical trawls between the maximum depth of the station and the surface. 4100 organisms belonging to 38 species of the phylum Arthropoda (Orders Calanoid and Cyclopoid) and 10 species of the phylum Cnidaria (Subclasses Hydroidolina and Trachylina) were identified. Copepods families with the greatest richness of genera are Aetideidae and Metridinidae, with Metridia gerlachei, Chiridius polaris and Gaetanus tenuispinosus being frequent species in more than 50 % of the stations. Identified species are common to the Antarctic Peninsula (Bellingshausen Sea, Scotia Sea and the Weddell Sea), also the range of four copepods are extended for the epipelagic and mesopelagic waters of the Gerlache Strait. Other frequent species are the hydromedusae Arctapodema sp. and Solmundella bitentaculata and the siphonophores Dimophyes arctica and Diphyes antarctica, the latter being collected in both polygastric and eudoxic forms (the dominant form in all stations).

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11

Grange, Laura J., Craig R. Smith, Dhugal J. Lindsay, Bastian Bentlage, and Marsh J. Youngbluth. "High Abundance of the Epibenthic Trachymedusa Ptychogastria polaris Allman, 1878 (Hydrozoa, Trachylina) in Subpolar Fjords along the West Antarctic Peninsula." PLOS ONE 12, no. 1 (2017): e0168648. http://dx.doi.org/10.1371/journal.pone.0168648.

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12

VAN DEN BROECK, Dries, Robert LÜCKING, Ester GAYA, José Luis CHAVES, Julius B. LEJJU, and Damien ERTZ. "Heterocyphelium leucampyx (Arthoniales, Ascomycota): another orphaned mazaediate lichen finds its way home." Lichenologist 49, no. 4 (2017): 333–45. http://dx.doi.org/10.1017/s0024282917000275.

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AbstractHeterocyphelium is a mazaediate genus containing a single species, H. leucampyx. The species was originally described from Cuba within the genus Trachylia (Arthoniales, Arthoniaceae) and later placed in various genera of the collective order Caliciales s. lat. For the past three decades, Heterocyphelium was considered an orphaned genus (incertae sedis) within the Ascomycota, since morphology alone could not resolve its systematic position. In this study, we added molecular data with the aim of resolving this uncertainty. Bayesian and maximum likelihood analyses of newly generated sequence data from the mitochondrial ribosomal RNA small subunit (mtSSU) and the RNA polymerase II second largest subunit gene (RPB2) provide clear evidence that Heterocyphelium leucampyx is nested within the order Arthoniales, in the family Lecanographaceae, sister to the genus Alyxoria. Heterocyphelium is a further example of parallel evolution of passive spore dispersal, prototunicate asci and the occurrence of a mazaedium in the Ascomycota, and another calicioid genus whose systematic placement could be eventually clarified by means of molecular data. Heterocyphelium is the fourth mazaediate genus in Arthoniales, in addition to Sporostigma, Tylophorella and Tylophoron.

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13

ALTUNA, AVARO. "Literature analysis and present state of knowledge of benthic Medusozoa (Cnidaria) from the Bay of Biscay and nearby areas (northeastern Atlantic), with emphasis on biodiversity." Zootaxa 1682, no. 1 (2008): 1. http://dx.doi.org/10.11646/zootaxa.1682.1.1.

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The literature on benthic Medusozoa (Cnidaria) from the Bay of Biscay and nearby areas (roughly between 42º–48º30’ N and 2°–10º W) is reviewed. Some 213 papers have been inventoried and classified in 17 groups based on their main contents. The present state of knowledge is analyzed, and papers covering each administrative territory of both adjacent countries, Spain and France, are listed. Around 2000, the accumulative curve of new papers and new records reached its ceiling. Some 205 species are known, with the suborder Conica (class Hydrozoa, order Leptothecata) accounting for the highest number of species (110), while the Proboscoida (Hydrozoa: Leptothecata), Filifera and Capitata (both Hydrozoa: Anthoathecata) account for much fewer species (21, 32 and 27 respectively). Only a few species are referable to the remaining subtaxa of Medusozoa, i.e. four to class Staurozoa, six to class Scyphozoa, four to subclass Trachylina (Hydrozoa), and one to order Limnomedusae (Hydrozoa). Species of suborders Capitata and Filifera (Hydrozoa, order Anthoathecata) will probably monopolize new discoveries of species. Knowledge of biodiversity is uneven amongst the different administrative provinces, with Guipúzcoa having the highest number of reported species (111 species, 54% of those known from the whole study area). Little information is available for certain areas, especially the French coasts. The fauna of every Spanish province has been the subject of MSc or PhD taxonomy-targeted research, but no such studies have been undertaken along the French coast. In Spain, the littoral fauna of Cantabria merits more intensive study because it represents an interface between the “cold” southwestern (from Asturias to Pontevedra) and “warm” southeastern (from Vizcaya to Gironde) areas of the Bay of Biscay.

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14

Panteleeva, Ninel N., Elena A. Frolova, and Olga V. Sheiko. "New records of the benthic medusa Ptychogastria polaris Allman, 1878 (Trachylida, Hydroidea) in the Barents Sea and off the Kurile Islands (Pacific Ocean)." Polar Biology 22, no. 6 (1999): 372–78. http://dx.doi.org/10.1007/s003000050431.

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15

Calder, Dale R. "Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago 2590." Zootaxa 2590, no. 1 (2010): 1–91. https://doi.org/10.11646/zootaxa.2590.1.1.

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Calder, Dale R. (2010): Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago 2590. Zootaxa 2590 (1): 1-91, DOI: 10.11646/zootaxa.2590.1.1, URL: https://biotaxa.org/Zootaxa/article/view/zootaxa.2590.1.1

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16

Montenegro, Javier, Allen G. Collins, Russell R. Hopcroft, et al. "Heterogeneity in diagnostic characters across ecoregions: A case study with Botrynema (Hydrozoa: Trachylina: Halicreatidae)." Frontiers in Marine Science 9 (January 17, 2023). http://dx.doi.org/10.3389/fmars.2022.1101699.

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IntroductionBotrynema, a genus of medusozoans in the trachyline family Halicreatidae, currently contains two species: B. brucei and B. ellinorae, distinguished by the presence or absence, respectively, of an apical knob as a diagnostic character. However, no study has corroborated if these taxonomic diagnoses have a biological and evolutionary basis. Therefore, in this study we attempted to address the question “do the two nominal species in the genus Botrynema represent independent phylogenetic lineages, or two phenotypic variants of a single species?MethodsIn this study we took advantage of legacy collections from different research expeditions across the globe from 2000 to 2021 to study the phylogenetics and taxonomy of the genus Botrynema.ResultsB. brucei and B. ellinorae present partially overlapping vertical distributions in the Arctic and as a whole in the Arctic the genus seems to be limited to the Atlantic water masses. The phylogenetic reconstruction based on the concatenated alignment corroborates the validity of the family Halicreatidae and of genus Botrynema as monophyletic groups. However no clear differentiation was found between the two presently accepted species, B. ellinorae and B. brucei.DiscussionBased on the evidence we gathered, we conclude that while the genus Botrynema does contain at least two species lineages, these lineages are not concordant with current species definitions. The species B. ellinorae is reassigned as a subspecies of B. brucei and diagnostic characters are provided.

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