Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge
Rhodaliids are a semi-benthic family of 14 physonect siphonophore species found in all oceans, except the Mediterranean and Arctic. They inhabit species-specific depth ranges in isolated locations and records are mostly sparse. Here, the first ever observations of rhodaliids from the Mid-Atlantic Ri...
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ftarchimer:oai:archimer.ifremer.fr:47207 2023-05-15T15:15:33+02:00 Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge Mapstone, Gillian M. Corbari, Laure Menot, Lenaick 2017 application/pdf https://archimer.ifremer.fr/doc/00361/47207/51395.pdf https://doi.org/10.1080/17451000.2016.1232830 https://archimer.ifremer.fr/doc/00361/47207/ eng eng Taylor & Francis As info:eu-repo/grantAgreement/EC/FP7/603418/EU//MIDAS https://archimer.ifremer.fr/doc/00361/47207/51395.pdf doi:10.1080/17451000.2016.1232830 https://archimer.ifremer.fr/doc/00361/47207/ 2016 Informa UK Limited, trading as Taylor & Francis Group info:eu-repo/semantics/openAccess restricted use Marine Biology Research (1745-1000) (Taylor & Francis As), 2017 , Vol. 13 , N. 5 , P. 486-493 Deep-sea Mid-Atlantic Ridge rhodaliid siphonophore text Publication info:eu-repo/semantics/article 2017 ftarchimer https://doi.org/10.1080/17451000.2016.1232830 2021-09-23T20:29:02Z Rhodaliids are a semi-benthic family of 14 physonect siphonophore species found in all oceans, except the Mediterranean and Arctic. They inhabit species-specific depth ranges in isolated locations and records are mostly sparse. Here, the first ever observations of rhodaliids from the Mid-Atlantic Ridge are given, from three images of two putative species. They come from depths of 3482 and 3667–3670 metres, on the Mid-Atlantic Ridge (MAR) at 23°N and 26°N, near two hydrothermal vents. Rhodaliids are very delicate animals and extremely hard to sample, particularly from such great depths, and the only comparable deep-living species so far described is the Galapagos Dandelion (Thermopalia taraxaca) from 2480–2938 metres on the Galapagos Rift and East Pacific Rise. This species inhabits the outer zone of certain hydrothermal vents where there is no hydrogen sulphide in the water, but connectivity with the MAR species is unlikely, since the latter inhabit a different ocean basin. Two, or possibly three, rhodaliid species have so far been collected in the North Atlantic, and all occurred near continental margins. These new observations are therefore important, and the images included here will hopefully alert future expeditions to hunt for, and perhaps even collect, more specimens. Rhodaliids are mostly observed individually adhering to a variety of substrata with their long tentacles, but very occasionally abundances of from 1 to 11 individuals m−2 have been noted. Rhodaliids feed on copepods, other small pelagic crustaceans and fish larvae, and can thus represent important members of deep-sea ecosystems. This paper provides a distribution map of all species with an accompanying table showing coordinates, depths and number of specimens collected, and a second table of comparative diagnostic rhodaliid characters, which is used to suggest possible identities for the two putative new MAR species. Article in Journal/Newspaper Arctic North Atlantic Copepods Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Galapagos Mid-Atlantic Ridge Pacific Marine Biology Research 13 5 486 493 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Deep-sea Mid-Atlantic Ridge rhodaliid siphonophore |
spellingShingle |
Deep-sea Mid-Atlantic Ridge rhodaliid siphonophore Mapstone, Gillian M. Corbari, Laure Menot, Lenaick Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
topic_facet |
Deep-sea Mid-Atlantic Ridge rhodaliid siphonophore |
description |
Rhodaliids are a semi-benthic family of 14 physonect siphonophore species found in all oceans, except the Mediterranean and Arctic. They inhabit species-specific depth ranges in isolated locations and records are mostly sparse. Here, the first ever observations of rhodaliids from the Mid-Atlantic Ridge are given, from three images of two putative species. They come from depths of 3482 and 3667–3670 metres, on the Mid-Atlantic Ridge (MAR) at 23°N and 26°N, near two hydrothermal vents. Rhodaliids are very delicate animals and extremely hard to sample, particularly from such great depths, and the only comparable deep-living species so far described is the Galapagos Dandelion (Thermopalia taraxaca) from 2480–2938 metres on the Galapagos Rift and East Pacific Rise. This species inhabits the outer zone of certain hydrothermal vents where there is no hydrogen sulphide in the water, but connectivity with the MAR species is unlikely, since the latter inhabit a different ocean basin. Two, or possibly three, rhodaliid species have so far been collected in the North Atlantic, and all occurred near continental margins. These new observations are therefore important, and the images included here will hopefully alert future expeditions to hunt for, and perhaps even collect, more specimens. Rhodaliids are mostly observed individually adhering to a variety of substrata with their long tentacles, but very occasionally abundances of from 1 to 11 individuals m−2 have been noted. Rhodaliids feed on copepods, other small pelagic crustaceans and fish larvae, and can thus represent important members of deep-sea ecosystems. This paper provides a distribution map of all species with an accompanying table showing coordinates, depths and number of specimens collected, and a second table of comparative diagnostic rhodaliid characters, which is used to suggest possible identities for the two putative new MAR species. |
format |
Article in Journal/Newspaper |
author |
Mapstone, Gillian M. Corbari, Laure Menot, Lenaick |
author_facet |
Mapstone, Gillian M. Corbari, Laure Menot, Lenaick |
author_sort |
Mapstone, Gillian M. |
title |
Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
title_short |
Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
title_full |
Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
title_fullStr |
Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
title_full_unstemmed |
Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
title_sort |
two deep-living rhodaliids (cnidaria, siphonophora) from the mid-atlantic ridge |
publisher |
Taylor & Francis As |
publishDate |
2017 |
url |
https://archimer.ifremer.fr/doc/00361/47207/51395.pdf https://doi.org/10.1080/17451000.2016.1232830 https://archimer.ifremer.fr/doc/00361/47207/ |
geographic |
Arctic Galapagos Mid-Atlantic Ridge Pacific |
geographic_facet |
Arctic Galapagos Mid-Atlantic Ridge Pacific |
genre |
Arctic North Atlantic Copepods |
genre_facet |
Arctic North Atlantic Copepods |
op_source |
Marine Biology Research (1745-1000) (Taylor & Francis As), 2017 , Vol. 13 , N. 5 , P. 486-493 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/603418/EU//MIDAS https://archimer.ifremer.fr/doc/00361/47207/51395.pdf doi:10.1080/17451000.2016.1232830 https://archimer.ifremer.fr/doc/00361/47207/ |
op_rights |
2016 Informa UK Limited, trading as Taylor & Francis Group info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1080/17451000.2016.1232830 |
container_title |
Marine Biology Research |
container_volume |
13 |
container_issue |
5 |
container_start_page |
486 |
op_container_end_page |
493 |
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1766345917176217600 |