Translator Disclaimer
1 December 2011 A New Aplodontoid Rodent (Mammalia) from the Early Oligocene (Orellan) of Montana and a Suggested Origin for the Family Mylagaulidae
Author Affiliations +
Abstract

A new genus and three new species of early aplodontoid rodent are described from the Orellan (early Oligocene) of Montana, Brachygaulus nicholsi (type species), Brachygaulus leistneri, and Brachygaulus xerobothrus. A fourth indeterminate species is also recognized but not named. The occlusal dental morphology of Brachygaulus has a number of similarities to that of the earliest mylagaulids, the Promylagaulinae (early Arikareean: late Oligocene). However, the brachydont cheek teeth of Brachygaulus are more similar to primitive contemporaneous basal aplodontoids (=Prosciurinae). Brachygaulus represents an ancestral morphotype for the Mylagaulidae, demonstrating that the family can be derived from a prosciurine-like ancestor independent of the Meniscomyinae.

William W. Korth and Alan R. Tabrum "A New Aplodontoid Rodent (Mammalia) from the Early Oligocene (Orellan) of Montana and a Suggested Origin for the Family Mylagaulidae," Annals of Carnegie Museum 80(1), 67-81, (1 December 2011). https://doi.org/10.2992/007.080.0107
Published: 1 December 2011
JOURNAL ARTICLE
15 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top