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GEOREF RECORD

An Upper Jurassic ichthyosaur (Ichthyosauria, Ophthalmosauridae) from the Bowser Basin, British Columbia

Robin L. Sissons, Michael W. Caldwell, Carol A. Evenchick, Donald B. Brinkman and Matthew J. Vavrek
An Upper Jurassic ichthyosaur (Ichthyosauria, Ophthalmosauridae) from the Bowser Basin, British Columbia
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (January 2016) 53 (1): 34-40

Abstract

Although the Jurassic was a period of high diversity in ichthyosaurs, only a small number of specimens have been recorded from Canada to date. We describe here a new occurrence of an ophthalmosaurid ichthyosaur from a shallow marine depositional environment within the Bowser Basin of northern British Columbia. Based on vertebral diameters and the size of the humerus, the ichthyosaur was relatively large compared to other contemporaneous forms, yet possessed teeth that were small for its body size. As well, the height to length ratio of the preserved vertebrae suggests it may have had a more elongate, less regionalized body shape. Although indeterminate at a generic level, the presence of Late Jurassic ichthyosaurs in nearshore waters of northwestern North America further demonstrates their cosmopolitan distribution.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 53
Serial Issue: 1
Title: An Upper Jurassic ichthyosaur (Ichthyosauria, Ophthalmosauridae) from the Bowser Basin, British Columbia
Affiliation: University of Alberta, Department of Biological Sciences, Edmonton, AB, Canada
Pages: 34-40
Published: 201601
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 43
Accession Number: 2016-025692
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N57°00'00" - N57°00'00", W129°30'00" - W129°30'00"
Secondary Affiliation: Geological Survey of Canada, CAN, CanadaRoyal Tyrrell Museum of Palaeontology, CAN, CanadaRoyal Ontario Museum, CAN, Canada
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Canadian Science Publishing, NRC Research Press, Ottawa, ON, Canada. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201613
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