Oldfieldthomasiidae is an extinct family of notoungulate mammals known from the Late Paleocene to Late Eocene of South America.[1] The family was classified by George Gaylord Simpson in 1945 and a synonym is Acoelodidae, defined by Florentino Ameghino in 1901.[2]

Oldfieldthomasiidae
Temporal range: Late Paleocene-Late Eocene
~58.7–33.9 Ma
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Notoungulata
Suborder: Typotheria
Family: Oldfieldthomasiidae
Simpson, 1945
Genera

Allalmeia
Brachystephanus
Camargomendesia
Colbertia
Dolichostylodon
Itaboraitherium
Kibenikhoria
Maxschlosseria
Oldfieldthomasia
Paginula
Suniodon
Tsamnichoria
Ultrapithecus
Xenostephanus

Synonyms

Etymology edit

The family is named after British zoologist Oldfield Thomas.

Fossils edit

Fossils of the family Oldfieldthomasiidae have been found in southern South America, in Argentina, Bolivia, Brazil and Chile.[2]

References edit

  1. ^ McKenna, Malcolm C.; Bell, Susan K. (1997). Classification of Mammals Above the Species Level. Columbia University Press, New York. pp. 1–631. ISBN 0-231-11013-8.
  2. ^ a b Oldfieldthomasiidae at Fossilworks.org