Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica
Clitellate annelids have a meagre body fossil record but they secrete proteinaceous cocoons for the protection of eggs that, after hardening, are readily fossilized and offer a largely untapped resource for assessing the evolutionary history of this group. We describe three species of clitellate coc...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/98352 2023-05-15T13:47:46+02:00 Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica Mc Loughlin, Stephen Bomfleur, Benjamin Mörs, Thomas Reguero, Marcelo Alfredo 2016-03 application/pdf 1-27 http://sedici.unlp.edu.ar/handle/10915/98352 https://ri.conicet.gov.ar/11336/57082 https://palaeo-electronica.org/content/2016/1448-eocene-annelid-cocoons en eng Palaeontologia Electronica vol. 19, no. 1 http://sedici.unlp.edu.ar/handle/10915/98352 https://ri.conicet.gov.ar/11336/57082 https://palaeo-electronica.org/content/2016/1448-eocene-annelid-cocoons issn:1094-8074 http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) CC-BY-NC-SA Zoología Branchiobdellids Spermatozoa La Meseta Formation Antarctic peninsula New genus New species Articulo 2016 ftunivlaplata 2020-09-20T00:00:59Z Clitellate annelids have a meagre body fossil record but they secrete proteinaceous cocoons for the protection of eggs that, after hardening, are readily fossilized and offer a largely untapped resource for assessing the evolutionary history of this group. We describe three species of clitellate cocoons (viz., Burejospermum seymourense sp. nov., B. punctatum sp. nov. and Pegmatothylakos manumii gen. et sp. nov.) from the lower Eocene La Meseta Formation, Seymour Island, Antarctica. The cocoons probably derive from continental settings and were transported to, and preserved within, nearshore marine to estuarine environments. The cocoons provide the first evidence of commensal or parasitic relationships in the Eocene continental ecosystemsof Antarctica. Moreover, numerous micro-organisms and the oldest fossilizedexamples of animal spermatozoa are preserved as moulds within the consolidatedwalls of the cocoons. Fossil annelid cocoons offer potential for enhanced palaeoenvironmental interpretation of sediments, correlation between continental and shallowmarine strata, and improved understanding of the development of clitellate annelid reproductive traits and the evolutionary history of soft-bodied micro-organisms in general. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Antarctic Antarctic Peninsula Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
topic |
Zoología Branchiobdellids Spermatozoa La Meseta Formation Antarctic peninsula New genus New species |
spellingShingle |
Zoología Branchiobdellids Spermatozoa La Meseta Formation Antarctic peninsula New genus New species Mc Loughlin, Stephen Bomfleur, Benjamin Mörs, Thomas Reguero, Marcelo Alfredo Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica |
topic_facet |
Zoología Branchiobdellids Spermatozoa La Meseta Formation Antarctic peninsula New genus New species |
description |
Clitellate annelids have a meagre body fossil record but they secrete proteinaceous cocoons for the protection of eggs that, after hardening, are readily fossilized and offer a largely untapped resource for assessing the evolutionary history of this group. We describe three species of clitellate cocoons (viz., Burejospermum seymourense sp. nov., B. punctatum sp. nov. and Pegmatothylakos manumii gen. et sp. nov.) from the lower Eocene La Meseta Formation, Seymour Island, Antarctica. The cocoons probably derive from continental settings and were transported to, and preserved within, nearshore marine to estuarine environments. The cocoons provide the first evidence of commensal or parasitic relationships in the Eocene continental ecosystemsof Antarctica. Moreover, numerous micro-organisms and the oldest fossilizedexamples of animal spermatozoa are preserved as moulds within the consolidatedwalls of the cocoons. Fossil annelid cocoons offer potential for enhanced palaeoenvironmental interpretation of sediments, correlation between continental and shallowmarine strata, and improved understanding of the development of clitellate annelid reproductive traits and the evolutionary history of soft-bodied micro-organisms in general. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
author |
Mc Loughlin, Stephen Bomfleur, Benjamin Mörs, Thomas Reguero, Marcelo Alfredo |
author_facet |
Mc Loughlin, Stephen Bomfleur, Benjamin Mörs, Thomas Reguero, Marcelo Alfredo |
author_sort |
Mc Loughlin, Stephen |
title |
Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica |
title_short |
Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica |
title_full |
Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica |
title_fullStr |
Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica |
title_full_unstemmed |
Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica |
title_sort |
fossil clitellate annelid cocoons and their microbiological inclusions from the eocene of seymour island, antarctica |
publishDate |
2016 |
url |
http://sedici.unlp.edu.ar/handle/10915/98352 https://ri.conicet.gov.ar/11336/57082 https://palaeo-electronica.org/content/2016/1448-eocene-annelid-cocoons |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Seymour Seymour Island |
geographic_facet |
Antarctic Antarctic Peninsula Seymour Seymour Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
op_relation |
Palaeontologia Electronica vol. 19, no. 1 http://sedici.unlp.edu.ar/handle/10915/98352 https://ri.conicet.gov.ar/11336/57082 https://palaeo-electronica.org/content/2016/1448-eocene-annelid-cocoons issn:1094-8074 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
op_rightsnorm |
CC-BY-NC-SA |
_version_ |
1766247821835501568 |