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Comparative myology of jaw, hyoid, and pectoral appendicular regions of New and Old World hystricomorph rodents. Bulletin of the AMNH ; v. 147, article 3

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dc.contributor.author Woods, Charles A. (Charles Arthur) en_US
dc.date.accessioned 2005-10-06T14:53:12Z
dc.date.available 2005-10-06T14:53:12Z
dc.date.issued 1972 en_US
dc.identifier.uri http://hdl.handle.net/2246/1096
dc.description p. 117-198 : ill. ; 27 cm. en_US
dc.description Thesis (Ph. D.)--University of Massachusetts. en_US
dc.description Includes bibliographical references (p. 192-198). en_US
dc.description.abstract "The musculature of 13 genera of New World and Old World hystricomorphous rodents was studied by dissection. The genera investigated were Proechimys, Echimys, Isothrix, Mesomys, Myocastor, Octodon, Ctenomys, Erethizon, Cavia, Chinchilla, and Dasyprocta of the New World, and Thryonomys and Petromus of the Old World. The objective of the investigation was to explore the myological characteristics of these rodents as an aid in better understanding their evolutionary history. The hystricognathous mandible that is found in most hystricomorphous rodents is associated with pars reflexa of the superficial masseter muscle. The elongated angular process is associated with the internal pterygoid muscle and with the superficial masseter. The posterior deep part of the lateral masseter muscle lies horizontally, and is associated with the post-condyloid process of these rodents. The temporal muscle is composed mainly of the posterior division. All of these specializations are probably related to the anterior-posterior movement of the jaw. The stylohyoid muscle is missing in all genera investigated (and in bathyergids). The scalenus anterior is present in all genera except Erethizon. The scapuloclavicularis muscle is found in all genera, and is similar in Thryonomys and Dasyprocta. The cutaneus maximus is similar in all genera and unlike the muscle in any other group of rodents. The evidence indicates that New World and Old World hystricomorphs probably represent a common group. This group might have evolved from a hystricognathous paramyid subgroup in the mid-Eocene. Another view is that the group might be a consequence of an invasion of South America by African froms via rafting across the then narrower Atlantic Ocean"--P. 119. en_US
dc.format.extent 19244270 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. 147, article 3 en_US
dc.subject.lcc QH1 .A4 vol.147, art.3, 1972 en_US
dc.subject.lcsh Rodents -- Anatomy. en_US
dc.subject.lcsh Muscles. en_US
dc.subject.lcsh Rodents -- Classification. en_US
dc.title Comparative myology of jaw, hyoid, and pectoral appendicular regions of New and Old World hystricomorph rodents. Bulletin of the AMNH ; v. 147, article 3 en_US
dc.title.alternative Hystricomorph rodents 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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