Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea)
Isometra vivipara and Phrixometra nutrix are two brooding feather stars (order Comatulida) that are widely distributed along the southern tip of South America to the Antarctic. We examined 210 specimens of I. vivipara and 38 specimens of P.nutrix collected during five cruises in the southwestern Atl...
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ftconicet:oai:ri.conicet.gov.ar:11336/149166 2023-10-09T21:46:16+02:00 Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) Pertossi, Renata Micaela Penchazadeh, Pablo E. Martinez, Mariano Ignacio application/pdf http://hdl.handle.net/11336/149166 eng eng Springer info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/10.1007/s12526-021-01194-9 info:eu-repo/semantics/altIdentifier/doi/10.1007/s12526-021-01194-9 http://hdl.handle.net/11336/149166 Pertossi, Renata Micaela; Penchazadeh, Pablo E.; Martinez, Mariano Ignacio; Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea); Springer; Marine Biodiversity; 51; 4; 6-2021; 1-12 1867-1616 1867-1624 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess Atribución-NoComercial-CompartirIgual 2.5 Argentina (CC BY-NC-SA 2.5 AR) https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CRINOIDS ISOMETRAVIVIPARA MACN MARSUPIUM PHRIXOMETRA NUTRIX SOUTHERN OCEAN https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s12526-021-01194-9 2023-09-24T18:33:14Z Isometra vivipara and Phrixometra nutrix are two brooding feather stars (order Comatulida) that are widely distributed along the southern tip of South America to the Antarctic. We examined 210 specimens of I. vivipara and 38 specimens of P.nutrix collected during five cruises in the southwestern Atlantic between 91 and 642 m depth. Specimens were analyzed and deposited in the National Invertebrate collection, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”. Isometravivipara reaches an arm length of 49 mm long and shows two stages of brooding: in the female genital pinnules and on the cirri of the mother. In this paper, we propose that spermatozoa reach the ovary via the ambulacral groove. By contrast, P. nutrix is smaller with a maximum recorded size of 26.8 mm, and brooding occurs only inside the female genital pinnules. Here, we record, for the first time for P.nutrix, spermatozoa shape and a cleaved egg attached externally to a genital pinnule of a female. The distributions of both species and their abundances in some areas could be related to their doliolaria larval stage. In addition, we extend the bathymetric range of P.nutrix to 512 m in Marine Protected Area Namuncurá/Burdwood Bank and distribution to the Mar del Plata Submarine Canyon area. We also propose mode of reproduction and developmental patterns as attributes for identification and possible explanations for their differences in distribution. Fil: Pertossi, Renata Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Fil: Penchazadeh, Pablo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Universidad Simón Bolívar; Venezuela Fil: Martinez, Mariano Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Southern Ocean The Antarctic Argentino Argentina Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Burdwood Bank ENVELOPE(-59.000,-59.000,-54.250,-54.250) Marine Biodiversity 51 4 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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language |
English |
topic |
CRINOIDS ISOMETRAVIVIPARA MACN MARSUPIUM PHRIXOMETRA NUTRIX SOUTHERN OCEAN https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
CRINOIDS ISOMETRAVIVIPARA MACN MARSUPIUM PHRIXOMETRA NUTRIX SOUTHERN OCEAN https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Pertossi, Renata Micaela Penchazadeh, Pablo E. Martinez, Mariano Ignacio Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) |
topic_facet |
CRINOIDS ISOMETRAVIVIPARA MACN MARSUPIUM PHRIXOMETRA NUTRIX SOUTHERN OCEAN https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Isometra vivipara and Phrixometra nutrix are two brooding feather stars (order Comatulida) that are widely distributed along the southern tip of South America to the Antarctic. We examined 210 specimens of I. vivipara and 38 specimens of P.nutrix collected during five cruises in the southwestern Atlantic between 91 and 642 m depth. Specimens were analyzed and deposited in the National Invertebrate collection, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”. Isometravivipara reaches an arm length of 49 mm long and shows two stages of brooding: in the female genital pinnules and on the cirri of the mother. In this paper, we propose that spermatozoa reach the ovary via the ambulacral groove. By contrast, P. nutrix is smaller with a maximum recorded size of 26.8 mm, and brooding occurs only inside the female genital pinnules. Here, we record, for the first time for P.nutrix, spermatozoa shape and a cleaved egg attached externally to a genital pinnule of a female. The distributions of both species and their abundances in some areas could be related to their doliolaria larval stage. In addition, we extend the bathymetric range of P.nutrix to 512 m in Marine Protected Area Namuncurá/Burdwood Bank and distribution to the Mar del Plata Submarine Canyon area. We also propose mode of reproduction and developmental patterns as attributes for identification and possible explanations for their differences in distribution. Fil: Pertossi, Renata Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Fil: Penchazadeh, Pablo E. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Universidad Simón Bolívar; Venezuela Fil: Martinez, Mariano Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación ... |
format |
Article in Journal/Newspaper |
author |
Pertossi, Renata Micaela Penchazadeh, Pablo E. Martinez, Mariano Ignacio |
author_facet |
Pertossi, Renata Micaela Penchazadeh, Pablo E. Martinez, Mariano Ignacio |
author_sort |
Pertossi, Renata Micaela |
title |
Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) |
title_short |
Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) |
title_full |
Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) |
title_fullStr |
Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) |
title_full_unstemmed |
Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea) |
title_sort |
brooding comatulids from the southwestern atlantic, argentina (echinodermata: crinoidea) |
publisher |
Springer |
url |
http://hdl.handle.net/11336/149166 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) ENVELOPE(-59.000,-59.000,-54.250,-54.250) |
geographic |
Antarctic Southern Ocean The Antarctic Argentino Argentina Pablo Burdwood Bank |
geographic_facet |
Antarctic Southern Ocean The Antarctic Argentino Argentina Pablo Burdwood Bank |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/10.1007/s12526-021-01194-9 info:eu-repo/semantics/altIdentifier/doi/10.1007/s12526-021-01194-9 http://hdl.handle.net/11336/149166 Pertossi, Renata Micaela; Penchazadeh, Pablo E.; Martinez, Mariano Ignacio; Brooding comatulids from the southwestern Atlantic, Argentina (Echinodermata: Crinoidea); Springer; Marine Biodiversity; 51; 4; 6-2021; 1-12 1867-1616 1867-1624 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess Atribución-NoComercial-CompartirIgual 2.5 Argentina (CC BY-NC-SA 2.5 AR) https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s12526-021-01194-9 |
container_title |
Marine Biodiversity |
container_volume |
51 |
container_issue |
4 |
_version_ |
1779321944764579840 |