Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications
Biogeography of deep-sea comatulid crinoids is poorly understood owing partly to the lack of detailed taxonomic studies. Recent cruises off Peru dredged up two new, well-preserved specimens of Thalassometra bispinosa, a deep-sea comatulid species which was heretofore only known from the Southern Oce...
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ftunivparis:oai:HAL:hal-00164911v1 2023-12-10T09:53:55+01:00 Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications Eléaume, Marc Améziane, Nadia Park, Young-Hyang Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) 2004 https://hal.science/hal-00164911 https://doi.org/10.1080/0022290310001613566 en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1080/0022290310001613566 hal-00164911 https://hal.science/hal-00164911 doi:10.1080/0022290310001613566 ISSN: 0022-2933 EISSN: 1464-5262 Journal of Natural History https://hal.science/hal-00164911 Journal of Natural History, 2004, 38 (15), pp.1949-1968. ⟨10.1080/0022290310001613566⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2004 ftunivparis https://doi.org/10.1080/0022290310001613566 2023-11-15T17:27:58Z Biogeography of deep-sea comatulid crinoids is poorly understood owing partly to the lack of detailed taxonomic studies. Recent cruises off Peru dredged up two new, well-preserved specimens of Thalassometra bispinosa, a deep-sea comatulid species which was heretofore only known from the Southern Ocean. These new records enabled re-evaluation of intra-specific variation for both quantitative and qualitative morphological characters. We thus provide a new description of the species, including these new specimens, and discuss the affinities with closely related species. As a consequence, we re-evaluate the systematic position of material previously assigned to T. bispinosa dredged from the Campbell Plateau, Southern Ocean. Discrete morphological characters, measurements and SEM photographs justify reassignment of these specimens to Thalassometra villosa. This species, another poorly known deep-sea comatulid crinoid previously known only from the Aleutian Islands in the North Pacific, is also redescribed. The biogeography of these two deep-sea comatulid species is discussed and hypotheses of their geographical distribution are proposed. Article in Journal/Newspaper Southern Ocean Aleutian Islands Université de Paris: Portail HAL Campbell Plateau ENVELOPE(171.000,171.000,-50.667,-50.667) Pacific Southern Ocean Journal of Natural History 38 15 1949 1968 |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Eléaume, Marc Améziane, Nadia Park, Young-Hyang Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
Biogeography of deep-sea comatulid crinoids is poorly understood owing partly to the lack of detailed taxonomic studies. Recent cruises off Peru dredged up two new, well-preserved specimens of Thalassometra bispinosa, a deep-sea comatulid species which was heretofore only known from the Southern Ocean. These new records enabled re-evaluation of intra-specific variation for both quantitative and qualitative morphological characters. We thus provide a new description of the species, including these new specimens, and discuss the affinities with closely related species. As a consequence, we re-evaluate the systematic position of material previously assigned to T. bispinosa dredged from the Campbell Plateau, Southern Ocean. Discrete morphological characters, measurements and SEM photographs justify reassignment of these specimens to Thalassometra villosa. This species, another poorly known deep-sea comatulid crinoid previously known only from the Aleutian Islands in the North Pacific, is also redescribed. The biogeography of these two deep-sea comatulid species is discussed and hypotheses of their geographical distribution are proposed. |
author2 |
Laboratoire d'océanographie dynamique et de climatologie (LODYC) Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Eléaume, Marc Améziane, Nadia Park, Young-Hyang |
author_facet |
Eléaume, Marc Améziane, Nadia Park, Young-Hyang |
author_sort |
Eléaume, Marc |
title |
Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications |
title_short |
Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications |
title_full |
Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications |
title_fullStr |
Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications |
title_full_unstemmed |
Re-evaluation of the systematics of two deep-sea species of Thalassometra (Echinomermata: Crinoidea) and its biogeographical implications |
title_sort |
re-evaluation of the systematics of two deep-sea species of thalassometra (echinomermata: crinoidea) and its biogeographical implications |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00164911 https://doi.org/10.1080/0022290310001613566 |
long_lat |
ENVELOPE(171.000,171.000,-50.667,-50.667) |
geographic |
Campbell Plateau Pacific Southern Ocean |
geographic_facet |
Campbell Plateau Pacific Southern Ocean |
genre |
Southern Ocean Aleutian Islands |
genre_facet |
Southern Ocean Aleutian Islands |
op_source |
ISSN: 0022-2933 EISSN: 1464-5262 Journal of Natural History https://hal.science/hal-00164911 Journal of Natural History, 2004, 38 (15), pp.1949-1968. ⟨10.1080/0022290310001613566⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1080/0022290310001613566 hal-00164911 https://hal.science/hal-00164911 doi:10.1080/0022290310001613566 |
op_doi |
https://doi.org/10.1080/0022290310001613566 |
container_title |
Journal of Natural History |
container_volume |
38 |
container_issue |
15 |
container_start_page |
1949 |
op_container_end_page |
1968 |
_version_ |
1784901076081704960 |