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Jurassic fishes from the western United States, with comments on Jurassic fish distribution. American Museum novitates ; no. 2796

Show simple item record Schaeffer, Bobb, 1913- en_US Patterson, Colin. en_US 2005-10-06T18:12:32Z 2005-10-06T18:12:32Z 1984 en_US
dc.description 86 p. : ill., maps ; 26 cm. en_US
dc.description Includes bibliographical references (p. 80-86). en_US
dc.description.abstract "Seven genera of fishes from the Jurassic (Upper Bathonian-Callovian) Sundance and Wanakah formations of western United States are described and their relationships discussed together with a review of their stratigraphic occurrence. The assemblage includes isolated teeth of the chondrichthyans Hybodus sp. and Ischyodus sp., in part from unrecorded Sundance localities near Hulett, Wyoming. Most common is the generalized neopterygian Hulettia americans (Eastman), new genus of unknown relationship, which occurs in the Sundance of Montana and Wyoming, and in the Wanakah of Colorado (including the Pony Express Limestone) and New Mexico (Todilto Limestone). Lepidotes sp. and Caturus dartoni (Eastman), which belong to a monophyletic species group within the genus Caturus, are both present in the Sundance and the Wanakah. Occithrissops willsoni, new genus, new species from the Sundance, is an ichthyodectiform teleost, but not assignable to suborder. Todiltia schoewei (Dunkle), new genus from the Wanakah, is a teleost compared with Ascalabos and Leptolepis, but its affinities remain unknown. The problem of incertae sedis genera and species (e.g., the monotypic Hulettia) is discussed in regard to identification and relationships of Jurassic fishes from other parts of the world. Included tables and paleogeographic maps show temporal and spatial distribution of these fishes, but variable preservation, inadequate description, and superficial systematic analysis usually preclude detailed comparisons of Jurassic taxa from the literature. It is probable, however, that most Jurassic fish assemblages, like those of the Sundance-Wanakah, are mixtures of form genera and monotypic genera whose relationships are imprecisely known"--P. 2. en_US
dc.format.extent 18644587 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2796 en_US
dc.subject.lcc QL1 .A436 no.2796, 1984 en_US
dc.subject.lcsh Fishes, Fossil -- West (U.S.) en_US
dc.subject.lcsh Paleontology -- Jurassic -- West (U.S.) en_US
dc.subject.lcsh Paleontology -- West (U.S.) en_US
dc.subject.lcsh Fishes, Fossil -- Geographical distribution. en_US
dc.title Jurassic fishes from the western United States, with comments on Jurassic fish distribution. American Museum novitates ; no. 2796 en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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