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Auditory features and affinities of the Eocene bats Icaronycteris and Palaeochiropteryx (Microchiroptera, incertae sedis) / Michael J. Novacek. American Museum novitates ; no. 2877

Show simple item record Novacek, Michael J. en_US 2005-10-06T18:09:27Z 2005-10-06T18:09:27Z 1987 en_US
dc.description 18 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 17-18). en_US
dc.description.abstract "The earliest known bats are skeletons of Icaronycteris index from the early Eocene of western Wyoming and a few less well-represented species from the early Eocene of France. Also known are Palaeochiropteryx tupaiodon and several other species from the middle Eocene of western Germany. These taxa have been regarded as primitive forms, either 'ancestral' to echolocating microchiropterans or 'ancestral' to both micro- and megachiropterans. Details of basicranial structure suggest that these Eocene forms were, however, specialized echolocators comparable to Recent microchiropterans. Moreover, quantitative analysis reveals that the Eocene bats have a more pronounced expansion of the cochlea than many Recent microchiropteran species. There is clear justification for reference of Icaronycteris and Palaeochiropteryx to the Microchiroptera. Conversely, there is no reason to recognize a 'primitive-ancestral' group, Eochiroptera, that is excluded from Microchiroptera or Megachiroptera. The relationships of Icaronycteris and Palaeochiropteryx within Microchiroptera remain uncertain. Association of these taxa and several other Eocene forms within the microchiropteran superfamily Palaeochiropterygoidea fails to clarify these relationships. Palaeochiropterygoidea has not been defined by derived characters, and Icaronycteris and Palaeochiropteryx are more accurately designated Microchiroptera incertae sedis. Several primitive features shown by Icaronycteris suggest that the development of a sophisticated system for echolocation within Microchiroptera occurred earlier than certain modifications of the postcranial skeleton"--P. [1]. en_US
dc.format.extent 4975746 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. 2877 en_US
dc.subject.lcc QL1 .A436 no.2877, 1987 en_US
dc.subject.lcsh Icaronycteris. en_US
dc.subject.lcsh Palaeochiropteryx. en_US
dc.subject.lcsh Ear -- Anatomy. en_US
dc.subject.lcsh Auditory pathways. en_US
dc.subject.lcsh Echolocation (Physiology) en_US
dc.subject.lcsh Bats, Fossil. en_US
dc.subject.lcsh Paleontology -- Eocene. en_US
dc.subject.lcsh Microchiroptera -- Evolution. en_US
dc.subject.lcsh Bats -- Phylogeny. en_US
dc.title Auditory features and affinities of the Eocene bats Icaronycteris and Palaeochiropteryx (Microchiroptera, incertae sedis) / Michael J. Novacek. American Museum novitates ; no. 2877 en_US
dc.title.alternative Eocene bat ears 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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