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The Cretaceous chimaeroids of North America. Bulletin of the AMNH ; v. 31, article 19.

Show simple item record Hussakof, Louis, 1881- en_US 2005-10-06T15:17:23Z 2005-10-06T15:17:23Z 1912 en_US
dc.description p. 195-227, [2] leaves of plates : ill., map. ; 24 cm. en_US
dc.description Includes bibliographical references (p. 226-227). en_US
dc.description.abstract ""It is shown in this paper that: 1. The genera of Cretaceous chimaeroids which have been described from North America are reducible to three - Edaphodon, Leptomylus, Isotaenia. 2. Edaphodon is the most common form. The 12 species which have been referred to it are reducible to six. 3. of these six, the two named by Cope, Edaphodon smocki and E. tripartitus, are identifiable with the European forms E. agassizi and E. sedgwicki, respectively. 4. These two species survived to a later time (Danian) in America than in Europe (Senonian). The time relations between Europe and America at the close of the Cretaceous were similar to those of the present day; i.e., certain species still living in America which had but recently (in a geological sense) become extinct in Europe. 5. Leptomylus represents the advancing line with a tendancy to develop cutting, instead of crushing, dental plates. This genus, however, is too specialized to be considered ancestral to the modern forms. Their ancestor is probably a genus like Elasmodus or Elasmodectes. 6. There are three localities in America from which Cretaceous chimaeroids are at present known: New Jersey, Mississippi and Wyoming. The first has yielded 9 of the 11 American forms, the other two localities only one species each"--P. 225-226. en_US
dc.format.extent 6788367 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : Published by order of the Trustees, American Museum of Natural History en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 31, article 19. en_US
dc.subject.lcc QH1 .A4 vol.31, art.19, 1912 en_US
dc.subject.lcsh Chimaeriformes -- United States. en_US
dc.subject.lcsh Fishes, Fossil -- United States. en_US
dc.subject.lcsh Paleontology -- Cretaceous -- United States. en_US
dc.subject.lcsh Paleontology -- United States. en_US
dc.title The Cretaceous chimaeroids of North America. Bulletin of the AMNH ; v. 31, article 19. en_US
dc.type text en_US

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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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