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The youngest occurrence of ichthyosaur embryos in the UK; a new specimen from the Early Jurassic (Toarcian) of Yorkshire

M. J. Boyd and D. R. Lomax
The youngest occurrence of ichthyosaur embryos in the UK; a new specimen from the Early Jurassic (Toarcian) of Yorkshire
Proceedings of the Yorkshire Geological Society (November 2018) 62 (2): 77-82

Abstract

The remains of between six and eight ichthyosaur embryos, still situated within a fragment of the rib-cage of the parent animal, are described. Each is represented by a string of vertebral centra, some with associated ribs. Other skeletal elements, including possible skull material, are represented only by isolated bones, none identifiable with certainty. The small limestone boulder in which the ichthyosaur specimens are preserved was collected from the beach at Sandsend, near Whitby, North Yorkshire, and derives from the Whitby Mudstone Formation (Hildoceras bifrons Ammonite Biozone) of the Toarcian Stage of the Lower Jurassic. The specimen cannot be identified beyond Ichthyosauria indet. However, it represents the geologically-youngest occurrence of ichthyosaur embryos thus far recorded from the UK and the first such occurrence to be reported from Yorkshire.


ISSN: 0044-0604
EISSN: 2041-4811
Coden: PYGSAB
Serial Title: Proceedings of the Yorkshire Geological Society
Serial Volume: 62
Serial Issue: 2
Title: The youngest occurrence of ichthyosaur embryos in the UK; a new specimen from the Early Jurassic (Toarcian) of Yorkshire
Affiliation: University of Manchester, United Kingdom
Pages: 77-82
Published: 201811
Text Language: English
Publisher: Yorkshire Geological Society, Leeds, United Kingdom
References: 20
Accession Number: 2019-003806
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N53°19'60" - N54°40'00", W02°30'00" - E00°10'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201902
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