Stegopoma giganteum Ramil & Vervoort 1992
Stegopoma giganteum Ramil & Vervoort, 1992 Fig. 3D–E; Table 3 Stegopoma giganteum Ramil & Vervoort, 1992: 36–38, fig. 5e–f. Material examined SOUTH ATLANTIC OCEAN • 5 colonies, up to 15 mm high (1 growing on Zygophylax sp., 1 on bivalve shell, 1 on ghost fishing net with a gonotheca); Valdiv...
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ftzenodo:oai:zenodo.org:5088924 2023-05-15T18:21:03+02:00 Stegopoma giganteum Ramil & Vervoort 1992 Gil, Marta Ramil, Fran name=SOUTH ATLANTIC OCEAN; east=6.4238887; north=-24.793888 2021-07-07 https://zenodo.org/record/5088924 https://doi.org/10.5281/zenodo.5088924 unknown info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/EB6F5251FFB9FF97ED25FB6D37B2FB56 doi:10.5852/ejt.2021.758.1425 http://zenodo.org/record/5088125 http://publication.plazi.org/id/17562A29FFB2FF9BEF24FFE6336CFFF9 doi:10.5281/zenodo.5088135 http://zoobank.org/7CA6D8AC-2312-47F9-8C17-528B94E4C8A7 doi:10.5281/zenodo.5088923 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5088924 https://doi.org/10.5281/zenodo.5088924 oai:zenodo.org:5088924 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Hydroids (Cnidaria, Hydrozoa) from the Vema and Valdivia seamounts (SE Atlantic), pp. 49-96 in European Journal of Taxonomy 758 60-61 Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Tiarannidae Stegopoma Stegopoma giganteum info:eu-repo/semantics/other publication-taxonomictreatment 2021 ftzenodo https://doi.org/10.5281/zenodo.508892410.5852/ejt.2021.758.142510.5281/zenodo.508813510.5281/zenodo.5088923 2023-03-10T14:42:35Z Stegopoma giganteum Ramil & Vervoort, 1992 Fig. 3D–E; Table 3 Stegopoma giganteum Ramil & Vervoort, 1992: 36–38, fig. 5e–f. Material examined SOUTH ATLANTIC OCEAN • 5 colonies, up to 15 mm high (1 growing on Zygophylax sp., 1 on bivalve shell, 1 on ghost fishing net with a gonotheca); Valdivia Seamount, stn BT12; 24°49′01″–24°47′38″ S, 6°24′40″–6°25′26″ E; 887– 886 m depth; 7 Feb. 2015; SEAFO-2015 leg.; SEAFO-2015-40222, SEAFO-2015-40612, SEAFO-2015-40811, SEAFO-2015-40827, SEAFO-2015-40852, LZM-UV slide R. 587. Description Colony composed of a thin and ramified stolon, growing attached on the hydrocaulus and branches of Zygophylax sp., from which arise pedicellate hydrothecae and gonothecae. Hydrothecae placed at the end of long, slender, smooth-walled and unbranched pedicels with some transversal scars due to regeneration after damage. Hydrothecae large, tubular, with smooth walls, almost bilaterally symmetrical, and slightly widening distally (Fig. 3D). Aperture closed by a triangular operculum adopting the shape of a gabled roof, formed by two opposite, semicircular sections on the distal part of the hydrothecal wall; opercular apparatus provided with longitudinal strips running downwards from top to basis. Hydranths are damaged or absent, and their description is not possible, but we can confirm that they are attached to the inner side of the hydrothecal base by means of a hyaline membranous ring, identical to the description given by Ramil & Vervoort (1992); this membranous ring indicates the boundary between the pedicel and the hydrotheca. The gonotheca shows similar morphology to that described for the hydrotheca, including the closing apparatus, but it is supported by a shorter pedicel (Fig. 3E). Remarks This is the first record of S. giganteum after its original description. The large size of the hydrothecae (2–3 mm long), with long and narrow pedicels, are distinctive features of this species. In addition, the opercular apparatus, the presence of a hyaline membranous ring at the attachment ... Other/Unknown Material South Atlantic Ocean Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Tiarannidae Stegopoma Stegopoma giganteum |
spellingShingle |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Tiarannidae Stegopoma Stegopoma giganteum Gil, Marta Ramil, Fran Stegopoma giganteum Ramil & Vervoort 1992 |
topic_facet |
Biodiversity Taxonomy Animalia Cnidaria Hydrozoa Leptothecata Tiarannidae Stegopoma Stegopoma giganteum |
description |
Stegopoma giganteum Ramil & Vervoort, 1992 Fig. 3D–E; Table 3 Stegopoma giganteum Ramil & Vervoort, 1992: 36–38, fig. 5e–f. Material examined SOUTH ATLANTIC OCEAN • 5 colonies, up to 15 mm high (1 growing on Zygophylax sp., 1 on bivalve shell, 1 on ghost fishing net with a gonotheca); Valdivia Seamount, stn BT12; 24°49′01″–24°47′38″ S, 6°24′40″–6°25′26″ E; 887– 886 m depth; 7 Feb. 2015; SEAFO-2015 leg.; SEAFO-2015-40222, SEAFO-2015-40612, SEAFO-2015-40811, SEAFO-2015-40827, SEAFO-2015-40852, LZM-UV slide R. 587. Description Colony composed of a thin and ramified stolon, growing attached on the hydrocaulus and branches of Zygophylax sp., from which arise pedicellate hydrothecae and gonothecae. Hydrothecae placed at the end of long, slender, smooth-walled and unbranched pedicels with some transversal scars due to regeneration after damage. Hydrothecae large, tubular, with smooth walls, almost bilaterally symmetrical, and slightly widening distally (Fig. 3D). Aperture closed by a triangular operculum adopting the shape of a gabled roof, formed by two opposite, semicircular sections on the distal part of the hydrothecal wall; opercular apparatus provided with longitudinal strips running downwards from top to basis. Hydranths are damaged or absent, and their description is not possible, but we can confirm that they are attached to the inner side of the hydrothecal base by means of a hyaline membranous ring, identical to the description given by Ramil & Vervoort (1992); this membranous ring indicates the boundary between the pedicel and the hydrotheca. The gonotheca shows similar morphology to that described for the hydrotheca, including the closing apparatus, but it is supported by a shorter pedicel (Fig. 3E). Remarks This is the first record of S. giganteum after its original description. The large size of the hydrothecae (2–3 mm long), with long and narrow pedicels, are distinctive features of this species. In addition, the opercular apparatus, the presence of a hyaline membranous ring at the attachment ... |
format |
Other/Unknown Material |
author |
Gil, Marta Ramil, Fran |
author_facet |
Gil, Marta Ramil, Fran |
author_sort |
Gil, Marta |
title |
Stegopoma giganteum Ramil & Vervoort 1992 |
title_short |
Stegopoma giganteum Ramil & Vervoort 1992 |
title_full |
Stegopoma giganteum Ramil & Vervoort 1992 |
title_fullStr |
Stegopoma giganteum Ramil & Vervoort 1992 |
title_full_unstemmed |
Stegopoma giganteum Ramil & Vervoort 1992 |
title_sort |
stegopoma giganteum ramil & vervoort 1992 |
publishDate |
2021 |
url |
https://zenodo.org/record/5088924 https://doi.org/10.5281/zenodo.5088924 |
op_coverage |
name=SOUTH ATLANTIC OCEAN; east=6.4238887; north=-24.793888 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Hydroids (Cnidaria, Hydrozoa) from the Vema and Valdivia seamounts (SE Atlantic), pp. 49-96 in European Journal of Taxonomy 758 60-61 |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://treatment.plazi.org/id/EB6F5251FFB9FF97ED25FB6D37B2FB56 doi:10.5852/ejt.2021.758.1425 http://zenodo.org/record/5088125 http://publication.plazi.org/id/17562A29FFB2FF9BEF24FFE6336CFFF9 doi:10.5281/zenodo.5088135 http://zoobank.org/7CA6D8AC-2312-47F9-8C17-528B94E4C8A7 doi:10.5281/zenodo.5088923 https://zenodo.org/communities/biosyslit https://zenodo.org/record/5088924 https://doi.org/10.5281/zenodo.5088924 oai:zenodo.org:5088924 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.508892410.5852/ejt.2021.758.142510.5281/zenodo.508813510.5281/zenodo.5088923 |
_version_ |
1766200110783397888 |