Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)

<p>Several British specimens of relatively complete and partial shells of small pleurosternid turtles, found in the Purbeck Limestone Group (Berriasian, Lower Cretaceous), are analysed in detail here. Despite having been found more than a century ago, most of them remained unpublished until no...

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Autores principales:	A. Guerrero, A. Pérez-García
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Paleontology QE701-760
Acceso en línea:	https://doaj.org/article/ec0a49befb9b4387b245b49873b674a9
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spelling	oai:doaj.org-article:ec0a49befb9b4387b245b49873b674a92021-11-19T06:47:45ZOntogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)10.5194/fr-24-357-20212193-00662193-0074https://doaj.org/article/ec0a49befb9b4387b245b49873b674a92021-11-01T00:00:00Zhttps://fr.copernicus.org/articles/24/357/2021/fr-24-357-2021.pdfhttps://doaj.org/toc/2193-0066https://doaj.org/toc/2193-0074<p>Several British specimens of relatively complete and partial shells of small pleurosternid turtles, found in the Purbeck Limestone Group (Berriasian, Lower Cretaceous), are analysed in detail here. Despite having been found more than a century ago, most of them remained unpublished until now. Due to the scarce knowledge available to date about the small individuals of Pleurosternidae from the British record, their taxonomic status was doubtful. Thus, some authors proposed their attribution to a new but not defined taxon of small size, whereas others suggested that they could represent juvenile individuals of <i>Pleurosternon bullockii</i>, the adults of which were also found in the Purbeck Limestone Group but at different levels. Knowledge about the shell of the adult individuals of <i>Pleurosternon bullockii</i> has notably increased recently, abundant information on its intraspecific variability being currently available. In this context, a detailed study of the small specimens through qualitative and quantitative approaches is performed here. The results are evidence a significant range of shape variability because of ontogenetic development, as well as other types of intraspecific variation such as inter-individual variation. As a consequence, their attribution to juvenile individuals of <i>Pleurosternon bullockii</i> is justified, providing new data on the ontogenetic development of a basal form.</p>A. GuerreroA. Pérez-GarcíaCopernicus PublicationsarticlePaleontologyQE701-760ENFossil Record, Vol 24, Pp 357-377 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Paleontology QE701-760
spellingShingle	Paleontology QE701-760 A. Guerrero A. Pérez-García Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)
description	<p>Several British specimens of relatively complete and partial shells of small pleurosternid turtles, found in the Purbeck Limestone Group (Berriasian, Lower Cretaceous), are analysed in detail here. Despite having been found more than a century ago, most of them remained unpublished until now. Due to the scarce knowledge available to date about the small individuals of Pleurosternidae from the British record, their taxonomic status was doubtful. Thus, some authors proposed their attribution to a new but not defined taxon of small size, whereas others suggested that they could represent juvenile individuals of <i>Pleurosternon bullockii</i>, the adults of which were also found in the Purbeck Limestone Group but at different levels. Knowledge about the shell of the adult individuals of <i>Pleurosternon bullockii</i> has notably increased recently, abundant information on its intraspecific variability being currently available. In this context, a detailed study of the small specimens through qualitative and quantitative approaches is performed here. The results are evidence a significant range of shape variability because of ontogenetic development, as well as other types of intraspecific variation such as inter-individual variation. As a consequence, their attribution to juvenile individuals of <i>Pleurosternon bullockii</i> is justified, providing new data on the ontogenetic development of a basal form.</p>
format	article
author	A. Guerrero A. Pérez-García
author_facet	A. Guerrero A. Pérez-García
author_sort	A. Guerrero
title	Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)
title_short	Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)
title_full	Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)
title_fullStr	Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)
title_full_unstemmed	Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)
title_sort	ontogenetic development of the european basal aquatic turtle <i>pleurosternon bullockii</i> (paracryptodira, pleurosternidae)
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/ec0a49befb9b4387b245b49873b674a9
work_keys_str_mv	AT aguerrero ontogeneticdevelopmentoftheeuropeanbasalaquaticturtleipleurosternonbullockiiiparacryptodirapleurosternidae AT aperezgarcia ontogeneticdevelopmentoftheeuropeanbasalaquaticturtleipleurosternonbullockiiiparacryptodirapleurosternidae
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Ontogenetic development of the European basal aquatic turtle <i>Pleurosternon bullockii</i> (Paracryptodira, Pleurosternidae)

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