The carpus of Eryops and the structure of the primitive chiropterygium. Bulletin of the AMNH ; v. 48, article 10.

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dc.contributor.authorGregory, William K. (William King), 1876-en_US
dc.contributor.authorMiner, Roy Waldo, 1875-1955.en_US
dc.contributor.authorNoble, Gladwyn Kingsley, 1894-1940.en_US
dc.date.accessioned2005-10-06T15:12:55Z
dc.date.available2005-10-06T15:12:55Z
dc.date.issued1923en_US
dc.descriptionp. 279-288 : ill. ; 24 cm.en_US
dc.descriptionIncludes bibliographical references (p. 288).en_US
dc.description.abstract"(One) Eryops had only four digits in the manus. (2) Eryops possessed a well-developed prepollex. (3) The carpus (as well as the tarsus) consists of two moieties; the radius (tibia) moiety, embracing the prepollex (prehallux) and carpal elements, forming the first preaxial ray, and the ulna (fibula) moiety, including the digits and their carpals, converging toward the ulna (fibula). The distinctness of these two moieties is further demonstrated by the subdivisions of the carpal (or tarsal) musculature. (4) The pectoral appendage of Eryops is readily comparable with the pectoral fin of the rhipidistian crossopterygians. The distinctness of the two primary series of carpal elements even in these forms is obvious. (5) All known Amphibia, recent and fossil, possess only four digits in the manus, but embryological and indirect palaeontological evidence allows us to infer that the most primitive Amphibia had a prepollex, five digits, and a postminimus in the hand; a prehallux, five digits, and a postminimus in the foot. (6) The primitive chiropterygium was therefore at least seven-rayed in both the manus and pes, but with a tendency toward a reduction in the two marginal rays, which has proceeded furthest in the last postaxial ray. (7) The carpus of Eryops and the primitive chiropterygium possessed three medialia and one centrale, as well as the radiale, intermedium, ulnare and carpalia. (8) The phalangeal formula of Eryops was only 2-2-3-2 in the manus"--P. 287-288.en_US
dc.format.extent938099 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/1304
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York : Published by order of the Trustees, American Museum of Natural Historyen_US
dc.relation.ispartofseriesBulletin of the American Museum of Natural History ; v. 48, article 10.en_US
dc.subject.lccQH1 .A4 vol.48, art.10, 1923en_US
dc.subject.lcshEryops -- Anatomy.en_US
dc.subject.lcshCarpus (Animal anatomy)en_US
dc.subject.lcshPaleontology -- Permian.en_US
dc.subject.lcshAmphibians -- Evolution.en_US
dc.titleThe carpus of Eryops and the structure of the primitive chiropterygium. Bulletin of the AMNH ; v. 48, article 10.en_US
dc.typetexten_US

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Bulletin of the American Museum of Natural History