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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ftdatacite:10.6084/m9.figshare.4312070 2023-05-15T15:17:18+02:00 Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge Mapstone, Gillian M. Corbari, Laure Menot, Lenaick 2016 https://dx.doi.org/10.6084/m9.figshare.4312070 https://tandf.figshare.com/articles/media/Two_deep-living_rhodaliids_Cnidaria_Siphonophora_from_the_Mid-Atlantic_Ridge/4312070 unknown Taylor & Francis https://dx.doi.org/10.1080/17451000.2016.1232830 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences article MediaObject Media Audiovisual 2016 ftdatacite https://doi.org/10.6084/m9.figshare.4312070 https://doi.org/10.1080/17451000.2016.1232830 2021-11-05T12:55:41Z 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 DataCite Metadata Store (German National Library of Science and Technology) Arctic Galapagos Mid-Atlantic Ridge Pacific |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences Mapstone, Gillian M. Corbari, Laure Menot, Lenaick Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge |
topic_facet |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 20199 Astronomical and Space Sciences not elsewhere classified FOS Physical sciences 69999 Biological Sciences not elsewhere classified Marine Biology Inorganic Chemistry FOS Chemical sciences |
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 |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.4312070 https://tandf.figshare.com/articles/media/Two_deep-living_rhodaliids_Cnidaria_Siphonophora_from_the_Mid-Atlantic_Ridge/4312070 |
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_relation |
https://dx.doi.org/10.1080/17451000.2016.1232830 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.4312070 https://doi.org/10.1080/17451000.2016.1232830 |
_version_ |
1766347553276690432 |