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    Chondrichthyans from a Cenomanian (Late Cretaceous) bonebed, Saskatchewan, Canada

    Underwood, Charlie J. and Cumbaa, S.L. (2010) Chondrichthyans from a Cenomanian (Late Cretaceous) bonebed, Saskatchewan, Canada. Palaeontology 53 (4), pp. 903-944. ISSN 0031-0239.

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    Abstract

    Acid preparation of samples of a bonebed from the Cenomanian of central Canada yielded several thousand well-preserved chondrichthyan teeth, in addition to numerous other vertebrate remains. Teeth and other remains of one species of chimaeroid, one species of hybodont shark, three species of Ptychodus, 10 species of neoselachian sharks and two species of batoid were recorded. The family Archaeolamnidae fam. nov., genera Meristodonoides gen. nov. and Telodontaspis gen. nov. and species Ptychodus rhombodus sp. nov., Telodontaspis agassizensis gen et sp. nov., Eostriatolamia paucicorrugata sp. nov., Roulletia canadensis sp. nov., Cretorectolobus robustus sp. nov. and Orectoloboides angulatus sp. nov. are described. Status of the genus Palaeoanacorax and the species Cretoxyrhina denticulata, Squalicorax curvatus and ‘Rhinobatos’incertus are discussed, and reconstructed dentitions of Archaeolamna and Roulletia presented. The fauna is of low diversity and dominated by active hunters, with many species apparently endemic to the northern Western Interior Seaway.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Canada, Cretaceous, hybodonts, lamniforms, Ptychodus, ray, shark
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Administrator
    Date Deposited: 21 Feb 2011 15:36
    Last Modified: 17 Apr 2013 12:20
    URI: http://eprints.bbk.ac.uk/id/eprint/3105

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