Lungfishes, tetrapods, paleontology, and plesiomorphy. Bulletin of the AMNH ; v. 167, article 4

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dc.contributor.author Rosen, Donn Eric, 1929- en_US
dc.contributor.author Forey, Peter L. en_US
dc.contributor.author Gardiner, Brian G.
dc.contributor.author Patterson, Colin.
dc.date.accessioned 2005-10-06T14:49:24Z
dc.date.available 2005-10-06T14:49:24Z
dc.date.issued 1981 en_US
dc.identifier.uri http://hdl.handle.net/2246/1054
dc.description p. 163-275 : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 264-275). en_US
dc.description.abstract "We conclude that the internal (excurrent) nostril of Recent lungfishes is a true choana, as judged by its comparison with (1) the internal nostril of a Devonian lungfish species which opens through the bony palate internal to an arcade of maxillary and premaxillary teeth; (2) the choana of the Devonian ichthyostegid amphibians, and (3) nostril development in Recent urodeles. The idea that lungfishes might therefore be the sister group of tetrapods is compared with the competing, deeply entrenched theory that rhipidistian fishes and eusthenopterids in particular include the ancestor of tetrapods. Our own theory, derived from study of Recent and fossil material, and an analysis of literature spanning 140 years, is framed in the context of a classification of the main groups of fossil and living gnathostomes: acanthodians, chondrichthyans, cladistians, actinopterygians, rhipidistians, actinistians, dipnoans, and tetrapods. In formulating our proposal we have reviewed the anatomy of the nasal capsule, nostrils and related structures, paired fins and their girdles, dermal bones of the skull, palate and jaw suspension, hyoid and gill arches, ribs and vertebrae, and scale and tooth structure. We hypothesize, in agreement with most nineteenth- and many twentieth-century biologists, and in disagreement with the current paleontological view, that lungfishes are the sister group of tetrapods, and further that actinistians are the sister group of those two, and that Eusthenopteron is the sister group of those three. We also conclude that the characters used formerly to link Eusthenopteron with tetrapods either (1) are primitive for all bony fishes (including cladistians and actinopterygians) or for living gnathostomes (including chondrichthyans); (2) are convergent with those of several groups of gnathostomes; (3) only justify the inclusion of Eusthenopteron in a group with actinistians, dipnoans and tetrapods; or (4) are spurious. We attribute the century of confusion about the structure and position of lungfishes to the traditional paleontological preoccupation with the search for ancestors, to the interpretation of Eusthenopteron in the light of tetrapods and the reciprocal interpretation of fossil amphibians in the light of Eusthenopteron, and to the paleontological predilection for using plesiomorphous characters to formulate schemes of relationships"--P. 163. en_US
dc.format.extent 27029626 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : American Museum of Natural History en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 167, article 4 en_US
dc.subject.lcc QH1 .A4 vol.167, art.4, 1981 en_US
dc.subject.lcsh Eusthenopteron. en_US
dc.subject.lcsh Lungfishes, Fossil. en_US
dc.subject.lcsh Lungfishes. en_US
dc.subject.lcsh Amphibians, Fossil. en_US
dc.subject.lcsh Leg -- Evolution. en_US
dc.subject.lcsh Vertebrates -- Evolution. en_US
dc.title Lungfishes, tetrapods, paleontology, and plesiomorphy. Bulletin of the AMNH ; v. 167, article 4 en_US
dc.title.alternative Lungfishes and tetrapods 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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