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Endocasts of amphicyonid carnivorans

by: Radinsky, Leonard B

Publication date: 1980

Topics: Amphicyonidae, Carnivora, Fossil, Skull, Casts, Paleontology, Neuroanatomy, Paleontology -- Tertiary

Publisher: New York, N.Y. : American Museum of Natural History

Collection: americanmuseumnaturalhistory; biodiversity

Contributor: American Museum of Natural History Library

Language: English

Rights: http://biodiversitylibrary.org/permissions

Rights-holder: American Museum of Natural History Library

Volume: no. 2694

11 p. : 26 cm

"Endocranial casts of 10 genera of amphicyonids, ranging in age from about 35 my to 10 my, reveal evolutionary trends of increase in relative brain size and expansion and increased folding of the neocortex. Amphicyonids had a distinctive pattern of cerebral convolutions, characterized by the presence of a long ectolateral sulcus, a short sulcus between the caudal ends of the ectolateral and suprasylvian sulci, and a complete, unopercularized ectosylvian sulcus. The ectolateral sulcus is a derived character amphicyonids share with canids, in contrast to a derived feature of basicranial circulation that links amphicyonids to ursids"--P. [1]

Title from caption

"February 25, 1980."

Includes bibliographical references (p. 11)

Abstract: 'Endocranial casts of 10 genera of amphicyonids, ranging in age from about 35 my to 10 my, reveal evolutionary trends of increase in relative brain size and expansion and increased folding of the neocortex. Amphicyonids had a distinctive pattern of cerebral convolutions, characterized by the presence of a long ectolateral sulcus, a short sulcus between the caudal ends of the ectolateral and suprasylvian sulci, and a complete, unopercularized ectosylvian sulcus. The ectolateral sulcus is a derived character amphicyonids share with canids, in contrast to a derived feature of basicranial circulation that links amphicyonids to ursids'--P. [1].