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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Detalles Bibliográficos
Autores principales:	Mc Loughlin, Stephen, Bomfleur, Benjamin, Mörs, Thomas, Reguero, Marcelo Alfredo
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2016
Materias:	Zoología Branchiobdellids Spermatozoa La Meseta Formation Antarctic peninsula New genus New species
Acceso en línea:	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
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-98352
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
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.
format	Articulo Articulo
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
work_keys_str_mv	AT mcloughlinstephen fossilclitellateannelidcocoonsandtheirmicrobiologicalinclusionsfromtheeoceneofseymourislandantarctica AT bomfleurbenjamin fossilclitellateannelidcocoonsandtheirmicrobiologicalinclusionsfromtheeoceneofseymourislandantarctica AT morsthomas fossilclitellateannelidcocoonsandtheirmicrobiologicalinclusionsfromtheeoceneofseymourislandantarctica AT regueromarceloalfredo fossilclitellateannelidcocoonsandtheirmicrobiologicalinclusionsfromtheeoceneofseymourislandantarctica
bdutipo_str	Repositorios
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Fossil clitellate annelid cocoons and their microbiological inclusions from the Eocene of Seymour Island, Antarctica

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