Tapeworm eggs in a 270 million-year-old shark coprolite.

Remains of parasites in vertebrates are rare from the Mesozoic and Paleozoic. Once most parasites that live in - or pass through - the gastrointestinal tract of vertebrates, fossil feces (coprolites) or even intestinal contents (enterolites) can eventually preserve their remains. Here we announce th...

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Autores principales:	Paula C Dentzien-Dias, George Poinar, Ana Emilia Q de Figueiredo, Ana Carolina L Pacheco, Bruno L D Horn, Cesar L Schultz
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4ccd05307ac14320b9d3384c081e4fba
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spelling	oai:doaj.org-article:4ccd05307ac14320b9d3384c081e4fba2021-11-18T07:59:28ZTapeworm eggs in a 270 million-year-old shark coprolite.1932-620310.1371/journal.pone.0055007https://doaj.org/article/4ccd05307ac14320b9d3384c081e4fba2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23383033/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Remains of parasites in vertebrates are rare from the Mesozoic and Paleozoic. Once most parasites that live in - or pass through - the gastrointestinal tract of vertebrates, fossil feces (coprolites) or even intestinal contents (enterolites) can eventually preserve their remains. Here we announce the discovery of a spiral shark coprolite from the Paleozoic bearing a cluster of 93 small oval-elliptical smooth-shelled structures, interpreted as eggs of a tapeworm.The eggs were found in a thin section of an elasmobranch coprolite. Most of the eggs are filled by pyrite and some have a special polar swelling (operculum), suggesting they are non-erupted eggs. One of the eggs contains a probable developing larva. The eggs are approximately 145-155 µm in length and 88-100 µm in width and vary little in size within the cluster. The depositional and morphological features of the eggs closely resemble those of cestodes. Not only do the individual eggs have features of extant tapeworms, but their deposition all together in an elongate segment is typical to modern tapeworm eggs deposited in mature segments (proglottids). This is the earliest fossil record of tapeworm parasitism of vertebrates and establishes a timeline for the evolution of cestodes. This discovery shows that the fossil record of vertebrate intestinal parasites is much older than was hitherto known and that the interaction between tapeworms and vertebrates occurred at least since the Middle-Late Permian.Paula C Dentzien-DiasGeorge PoinarAna Emilia Q de FigueiredoAna Carolina L PachecoBruno L D HornCesar L SchultzPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 1, p e55007 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Paula C Dentzien-Dias George Poinar Ana Emilia Q de Figueiredo Ana Carolina L Pacheco Bruno L D Horn Cesar L Schultz Tapeworm eggs in a 270 million-year-old shark coprolite.
description	Remains of parasites in vertebrates are rare from the Mesozoic and Paleozoic. Once most parasites that live in - or pass through - the gastrointestinal tract of vertebrates, fossil feces (coprolites) or even intestinal contents (enterolites) can eventually preserve their remains. Here we announce the discovery of a spiral shark coprolite from the Paleozoic bearing a cluster of 93 small oval-elliptical smooth-shelled structures, interpreted as eggs of a tapeworm.The eggs were found in a thin section of an elasmobranch coprolite. Most of the eggs are filled by pyrite and some have a special polar swelling (operculum), suggesting they are non-erupted eggs. One of the eggs contains a probable developing larva. The eggs are approximately 145-155 µm in length and 88-100 µm in width and vary little in size within the cluster. The depositional and morphological features of the eggs closely resemble those of cestodes. Not only do the individual eggs have features of extant tapeworms, but their deposition all together in an elongate segment is typical to modern tapeworm eggs deposited in mature segments (proglottids). This is the earliest fossil record of tapeworm parasitism of vertebrates and establishes a timeline for the evolution of cestodes. This discovery shows that the fossil record of vertebrate intestinal parasites is much older than was hitherto known and that the interaction between tapeworms and vertebrates occurred at least since the Middle-Late Permian.
format	article
author	Paula C Dentzien-Dias George Poinar Ana Emilia Q de Figueiredo Ana Carolina L Pacheco Bruno L D Horn Cesar L Schultz
author_facet	Paula C Dentzien-Dias George Poinar Ana Emilia Q de Figueiredo Ana Carolina L Pacheco Bruno L D Horn Cesar L Schultz
author_sort	Paula C Dentzien-Dias
title	Tapeworm eggs in a 270 million-year-old shark coprolite.
title_short	Tapeworm eggs in a 270 million-year-old shark coprolite.
title_full	Tapeworm eggs in a 270 million-year-old shark coprolite.
title_fullStr	Tapeworm eggs in a 270 million-year-old shark coprolite.
title_full_unstemmed	Tapeworm eggs in a 270 million-year-old shark coprolite.
title_sort	tapeworm eggs in a 270 million-year-old shark coprolite.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/4ccd05307ac14320b9d3384c081e4fba
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Tapeworm eggs in a 270 million-year-old shark coprolite.

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