Notes on Didelphidae (Mammalia, Marsupialia) from the Huayquerian (Pliocene) of Argentina

Title Variants

Alternative: Didelphidae

Related Titles

Series: American Museum novitates, no. 2559

By

Simpson, George Gaylord, 1902-1984

Type

Book

Material

Published material

Publication info

New York, N.Y, American Museum of Natural History, c1974

Notes

"Late Tertiary beds in and around the Santa MariМЃa valley of the Province of Catamarca, Argentina, were long known by the invalid name 'Araucanense' or derivatives therefrom. Thay can now be designated as a sequence of formations, from top to bottom: Corral Quemado, AndalgalaМЃ, Chiquimil A, and Chiquimil B. The Corral Quemado and AndalgalaМЃ formations are of Huayquerian (Pliocene, perhaps middle Pliocene) age. The age or ages of the Chiquimil are not adequately established. Didelphidae known from the Huayquerian of the Corral Quemado and AndalgalaМЃ are identified and a number of specimens described: Didelphis pattersoni, Lutreolina cf. crassicaudata, and ?Sparassocynus species innominata. Those three very different genera represent the reappearance in the known record of varied South American didelphids after a long gap from the Riochican (nominal late Paleocene) during which only a few quite different microbiotheres are known. The inferences are not only that sampling of small fossil mammals is inadequate in South America but also that much, perhaps most, of didelphid evolution was occurring outside the regions of known fossil fields"--P. 3.

Subjects

Argentina , Catamarca (Province) , Didelphimorphia, Fossil , Mammals, Fossil , Opossums, Fossil , Paleontology , Pliocene

Call Number

QL1 .A436 no.2559, 1974

Language

English

Identifiers

LCCN: https://lccn.loc.gov/75301757
OCLC: 1218736801230