Sibogita geometrica Maas, 1905 New
Sibogita geometrica Maas, 1905 New record to China (Figs 14–16) Sibogita geometrica Maas, 1905: 17, pl. 3, figs. 16–18; Mayer, 1910: 186, fig. 99; Kramp, 1965: 49; Kramp, 1968: 57, fig. 151 a–b; Schuchert, 2009: 455, fig. 8. Sibogita geometrica occidentalis Kramp, 1959: 28, 129, pl. 2, figs. 2–3, te...
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Open Polar |
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Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Bythotiaridae Sibogita Sibogita geometrica |
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Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Bythotiaridae Sibogita Sibogita geometrica Zhenzu Xu Jiaqi Huang Lin, Mao Donghui Guo Chunguang Wang Sibogita geometrica Maas, 1905 New |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Bythotiaridae Sibogita Sibogita geometrica |
description |
Sibogita geometrica Maas, 1905 New record to China (Figs 14–16) Sibogita geometrica Maas, 1905: 17, pl. 3, figs. 16–18; Mayer, 1910: 186, fig. 99; Kramp, 1965: 49; Kramp, 1968: 57, fig. 151 a–b; Schuchert, 2009: 455, fig. 8. Sibogita geometrica occidentalis Kramp, 1959: 28, 129, pl. 2, figs. 2–3, text-figs. 4–5. Calycopsis geometrica Bigelow, 1919: 290, pl. 40, figs. 5–7, pl. 41, fig. 2. Material examined. One specimen, Beibu Gulf of South China Sea, station J 62 (18 ° 28 ’N, 108 ° 34 ’E), depth 25m, 31 July 2006, coll. Donghui Guo. Description. Umbrella bell-shaped, 4.5 mm in height, 3.5 mm in width, with round dome, apex very thick, manubrium short small, about 1 / 3 length of subumbrellar cavity; mouth simple, circular; gonads in eight adradial rows, about four transverse folds in each row; with 4 primary radial canals, which somewhat irregularly branched, as seen from the figure they arise from the corners of the manubrium in four unequal groups; most of them bifurcated once or twice at various levels, some of them immediately before reaching the circular canal, occasional anastomoses occur; a few of them proceed undivided to the circular canal; no centripetal canals; altogether 9 canals join the circular canal; radial canals widening containing dark pigment granules; with 9 fully developed tentacles, without basal swellings, and no accumulations of pigment granules, but their basal part adnate to exumbrella, sunk into a narrow furrow between two marginal lobes; everyone of the fully developed tentacles placed opposite a radiating canal, and between two successive tentacles without small tentacles or wart-like protuberances; each tentacles with a terminal knob of cnidocysts, and no ocelli; velum narrow. Biology. The species is a quite rare oceanic species. Bleeker & Van der Spoel (1988) proposed a diel vertical migration as all night samples were taken above depth 200 m and all day samples were taken bellow. Our specimen was found at 25 meters from the Beibu Gulf, northern South China Sea. Distribution. Malayan Archipelago and tropical Indian Ocean (Maas, 1905; Bigelow, 1919), Bay of Biscay, Azores and mid-Atlantic (Kramp, 1959; Bleeker & Van der Spoel, 1988), Benguela current off South Africa (Pagès et al ., 1992), northern South China Sea. Remarks. Our specimen has little different with Maas (1905). In original description, the single specimen has 32 canals and only 16 tentacles. In our specimen, there were 9 canals join the circular canal, and 9 fully developed tentacles, each of which placed opposite a radiating canals. On the other hand, the 4 primary radial canals somewhat irregularly branched. Thus, our specimen represents an intermediate form during its development. Although Bigelow (1919) observed the presence of pigment spot or ocelli at the base of the tentacles of the Philippine specimens, no such structures were observed in Maas’s specimen and ours. Kramp (1959) proposed that the Atlantic population slight differs from the Pacific one and then introduced the former as the subspecies Sibogita geometrica occidentalis . The differences to the nominate subspecies were given as a smaller bell-size, fewer gonadal folds, and radial canals dividing already close to the centre. After checking more specimens from the Pacific, Kramp (1965) synonymized the subspecies occidentalis with the nominal Pacific species. Some other authors (e.g. Winkler, 1982; Blecker & Van der Spoel, 1988) also confirmed this. Both forms are occurring in the Atlantic and the Pacific and they are treated as intermediate forms (Schuchert, 2009). Funding This study was supported by Global Climate Change and Ocean Atmosphere Interaction Research (GASI- 01-02- 02-03, GASI- 01-02-04,GASI- 01-02-02-01), the Marine Biological Sample Museum of the Chinese Offshore Investigation and Assessment, and the National Basic Research Program of China (2011 CB 403604). : Published as part of Zhenzu Xu, Jiaqi Huang, Mao Lin, Donghui Guo & Chunguang Wang, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea II: Family Bythotiaridae (Anthomedusae), pp. 149-157 in Zoological Systematics 41 (2) on pages 155-156, DOI: 10.11865/zs.2016013, http://zenodo.org/record/270289 : {"references": ["Maas, O. 1905. Die Craspedoten Medusen der Siboga-Expeditie. Siboga-Expeditie, 10: 1 - 84.", "Mayer, A. G. 1910. Medusae of the world. Volume I - II the Hydromedusae. Carnegie Institution, Washington. 498 pp.", "Kramp, P. L. 1965. The Hydromedusae of the Pacific and Indian Oceans. Dana-Report, 63: 1 - 162.", "Kramp, P. L. 1968. The Hydromedusae of the Pacific and Indian Oceans. Sections II and III. Dana-Report, 72: 1 - 200.", "Schuchert, P. 2009. The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera Part 5. Revue Suisse de Zoologie, 116 (3 - 4): 441 - 507.", "Kramp, P. L. 1959. The Hydromedusae of the Atlantic Ocean and adjacent waters. Dana-Report, 46: 1 - 283.", "Bigelow, H. B. 1919. Hydromeudsae, siphonophores and ctenophores of the \" Albatross \" Philippine Expedition. Bulletin of the United States National Museum, (100) 1 (5): 279 - 362, pls. 39 - 43.", "Bleeker, J., Van der Spoel, S. 1988. Medusae of the Amsterdam Mid North Atlantic Plankton Expeditions (1980 - 1983) with description of two new species. Bijdragen tot de Dierkunde, 58 (2): 227 - 258.", "Pages, F., Gili, J. M., Bouillon, J. 1992. Medusae (Hydrozoa, Scyphozoa, Cubozoa) of the Benguela Current (southeastern Atlantic). Scientia Marina, 56 (Supl. 1): 1 - 64.", "Winkler, J. T. 1982. The Hydromedusae of the Amsterdam Mid North Atlantic Plankton Expedition, 1980 (Coelenterata, Hydrozoa). Beaufortia, 32: 27 - 56."]} |
format |
Text |
author |
Zhenzu Xu Jiaqi Huang Lin, Mao Donghui Guo Chunguang Wang |
author_facet |
Zhenzu Xu Jiaqi Huang Lin, Mao Donghui Guo Chunguang Wang |
author_sort |
Zhenzu Xu |
title |
Sibogita geometrica Maas, 1905 New |
title_short |
Sibogita geometrica Maas, 1905 New |
title_full |
Sibogita geometrica Maas, 1905 New |
title_fullStr |
Sibogita geometrica Maas, 1905 New |
title_full_unstemmed |
Sibogita geometrica Maas, 1905 New |
title_sort |
sibogita geometrica maas, 1905 new |
publisher |
Zenodo |
publishDate |
2016 |
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https://dx.doi.org/10.5281/zenodo.6086008 https://zenodo.org/record/6086008 |
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Indian Pacific |
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Indian Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
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ftdatacite:10.5281/zenodo.6086008 2023-05-15T17:37:15+02:00 Sibogita geometrica Maas, 1905 New Zhenzu Xu Jiaqi Huang Lin, Mao Donghui Guo Chunguang Wang 2016 https://dx.doi.org/10.5281/zenodo.6086008 https://zenodo.org/record/6086008 unknown Zenodo http://zenodo.org/record/270289 http://publication.plazi.org/id/6A23FF95FFE1FFA9FFDCFFADFF8D696F http://zoobank.org/urn:lsid:zoobank.org:pub:A599FD08-F5AE-415C-B19A-DA39F8E87640 https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11865/zs.2016013 http://zenodo.org/record/270289 http://publication.plazi.org/id/6A23FF95FFE1FFA9FFDCFFADFF8D696F https://dx.doi.org/10.5281/zenodo.270297 http://zoobank.org/urn:lsid:zoobank.org:pub:A599FD08-F5AE-415C-B19A-DA39F8E87640 https://dx.doi.org/10.5281/zenodo.6086009 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Anthoathecata Bythotiaridae Sibogita Sibogita geometrica article-journal ScholarlyArticle Taxonomic treatment Text 2016 ftdatacite https://doi.org/10.5281/zenodo.6086008 https://doi.org/10.11865/zs.2016013 https://doi.org/10.5281/zenodo.270297 https://doi.org/10.5281/zenodo.6086009 2022-04-01T10:28:58Z Sibogita geometrica Maas, 1905 New record to China (Figs 14–16) Sibogita geometrica Maas, 1905: 17, pl. 3, figs. 16–18; Mayer, 1910: 186, fig. 99; Kramp, 1965: 49; Kramp, 1968: 57, fig. 151 a–b; Schuchert, 2009: 455, fig. 8. Sibogita geometrica occidentalis Kramp, 1959: 28, 129, pl. 2, figs. 2–3, text-figs. 4–5. Calycopsis geometrica Bigelow, 1919: 290, pl. 40, figs. 5–7, pl. 41, fig. 2. Material examined. One specimen, Beibu Gulf of South China Sea, station J 62 (18 ° 28 ’N, 108 ° 34 ’E), depth 25m, 31 July 2006, coll. Donghui Guo. Description. Umbrella bell-shaped, 4.5 mm in height, 3.5 mm in width, with round dome, apex very thick, manubrium short small, about 1 / 3 length of subumbrellar cavity; mouth simple, circular; gonads in eight adradial rows, about four transverse folds in each row; with 4 primary radial canals, which somewhat irregularly branched, as seen from the figure they arise from the corners of the manubrium in four unequal groups; most of them bifurcated once or twice at various levels, some of them immediately before reaching the circular canal, occasional anastomoses occur; a few of them proceed undivided to the circular canal; no centripetal canals; altogether 9 canals join the circular canal; radial canals widening containing dark pigment granules; with 9 fully developed tentacles, without basal swellings, and no accumulations of pigment granules, but their basal part adnate to exumbrella, sunk into a narrow furrow between two marginal lobes; everyone of the fully developed tentacles placed opposite a radiating canal, and between two successive tentacles without small tentacles or wart-like protuberances; each tentacles with a terminal knob of cnidocysts, and no ocelli; velum narrow. Biology. The species is a quite rare oceanic species. Bleeker & Van der Spoel (1988) proposed a diel vertical migration as all night samples were taken above depth 200 m and all day samples were taken bellow. Our specimen was found at 25 meters from the Beibu Gulf, northern South China Sea. Distribution. Malayan Archipelago and tropical Indian Ocean (Maas, 1905; Bigelow, 1919), Bay of Biscay, Azores and mid-Atlantic (Kramp, 1959; Bleeker & Van der Spoel, 1988), Benguela current off South Africa (Pagès et al ., 1992), northern South China Sea. Remarks. Our specimen has little different with Maas (1905). In original description, the single specimen has 32 canals and only 16 tentacles. In our specimen, there were 9 canals join the circular canal, and 9 fully developed tentacles, each of which placed opposite a radiating canals. On the other hand, the 4 primary radial canals somewhat irregularly branched. Thus, our specimen represents an intermediate form during its development. Although Bigelow (1919) observed the presence of pigment spot or ocelli at the base of the tentacles of the Philippine specimens, no such structures were observed in Maas’s specimen and ours. Kramp (1959) proposed that the Atlantic population slight differs from the Pacific one and then introduced the former as the subspecies Sibogita geometrica occidentalis . The differences to the nominate subspecies were given as a smaller bell-size, fewer gonadal folds, and radial canals dividing already close to the centre. After checking more specimens from the Pacific, Kramp (1965) synonymized the subspecies occidentalis with the nominal Pacific species. Some other authors (e.g. Winkler, 1982; Blecker & Van der Spoel, 1988) also confirmed this. Both forms are occurring in the Atlantic and the Pacific and they are treated as intermediate forms (Schuchert, 2009). Funding This study was supported by Global Climate Change and Ocean Atmosphere Interaction Research (GASI- 01-02- 02-03, GASI- 01-02-04,GASI- 01-02-02-01), the Marine Biological Sample Museum of the Chinese Offshore Investigation and Assessment, and the National Basic Research Program of China (2011 CB 403604). : Published as part of Zhenzu Xu, Jiaqi Huang, Mao Lin, Donghui Guo & Chunguang Wang, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea II: Family Bythotiaridae (Anthomedusae), pp. 149-157 in Zoological Systematics 41 (2) on pages 155-156, DOI: 10.11865/zs.2016013, http://zenodo.org/record/270289 : {"references": ["Maas, O. 1905. Die Craspedoten Medusen der Siboga-Expeditie. Siboga-Expeditie, 10: 1 - 84.", "Mayer, A. G. 1910. Medusae of the world. Volume I - II the Hydromedusae. Carnegie Institution, Washington. 498 pp.", "Kramp, P. L. 1965. The Hydromedusae of the Pacific and Indian Oceans. Dana-Report, 63: 1 - 162.", "Kramp, P. L. 1968. The Hydromedusae of the Pacific and Indian Oceans. Sections II and III. Dana-Report, 72: 1 - 200.", "Schuchert, P. 2009. The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera Part 5. Revue Suisse de Zoologie, 116 (3 - 4): 441 - 507.", "Kramp, P. L. 1959. The Hydromedusae of the Atlantic Ocean and adjacent waters. Dana-Report, 46: 1 - 283.", "Bigelow, H. B. 1919. Hydromeudsae, siphonophores and ctenophores of the \" Albatross \" Philippine Expedition. Bulletin of the United States National Museum, (100) 1 (5): 279 - 362, pls. 39 - 43.", "Bleeker, J., Van der Spoel, S. 1988. Medusae of the Amsterdam Mid North Atlantic Plankton Expeditions (1980 - 1983) with description of two new species. Bijdragen tot de Dierkunde, 58 (2): 227 - 258.", "Pages, F., Gili, J. M., Bouillon, J. 1992. Medusae (Hydrozoa, Scyphozoa, Cubozoa) of the Benguela Current (southeastern Atlantic). Scientia Marina, 56 (Supl. 1): 1 - 64.", "Winkler, J. T. 1982. The Hydromedusae of the Amsterdam Mid North Atlantic Plankton Expedition, 1980 (Coelenterata, Hydrozoa). Beaufortia, 32: 27 - 56."]} Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Indian Pacific |