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Infraorbital bones and their bearing on the phylogeny and geography of osteoglossomorph fishes. American Museum novitates ; no. 2394

Show simple item record Nelson, Gareth J. en_US 2005-10-06T16:31:17Z 2005-10-06T16:31:17Z 1969 en_US
dc.description 37 p. : ill. ; 24 cm. en_US
dc.description Includes bibliographical references (p. 32-37). en_US
dc.description.abstract "The primitive condition of the teleostean infraorbital series probably included seven separate bones from the antiorbital to the dermosphenotic. The anterior four bones probably enclosed more than one neuromast each, but the posterior three bones probably enclosed only one neuromast each. Reduction both of bone and neuromast numbers seems to have occurred during the evolution of most teleostean groups. The primitive condition of seven infraorbital bones occurs in at least some members of all major teleostean groups except the Osteoglossomorpha. It is suggested that the osteoglossomorph condition, typically of six or fewer bones, has resulted from secondary fusion between two of the middle bones of the series. Infraorbital and other evidence, primarily the structure of the caudal fin, indicate that the Recent Osteoglossomorpha constitute a monophyletic group, and suggest certain interrelationships among the members of that group. Nevertheless, some interrelationships remain problematical. For this reason a satisfactory phyletic classification of the Osteoglossomorpha and a comprehensive theory of their geographic history are not yet attainable"--P. 31-32. en_US
dc.format.extent 2658302 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. 2394 en_US
dc.subject.lcc QL1 .A436 no.2394, 1969 en_US
dc.subject.lcsh Osteoglossiformes, Fossil. en_US
dc.subject.lcsh Bones. en_US
dc.subject.lcsh Osteoglossiformes -- Anatomy. en_US
dc.subject.lcsh Osteichthyes -- Evolution. en_US
dc.subject.lcsh Paleontology -- Holocene. en_US
dc.title Infraorbital bones and their bearing on the phylogeny and geography of osteoglossomorph fishes. American Museum novitates ; no. 2394 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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