Insectivores and a bat from the early Oligocene Caijiachong Formation of Yunnan, China.

Abstract

Two insectivores and a bat are among the mammals known from the early Oligocene Caijiachong Formation of Yunnan, China. One insectivore is a dormaaliid and, although not identifiable to genus, appears to be generically distinct from previously recorded Asian genera of the family, lctopidium and Tupaiodon. Likewise, the second insectivore, an erinaceid, appears to be generically distinct from all previously known Asian genera of that family. A single bat tooth from the Caijiachong Formation is now the oldest bat from China. Probably a vespertilionoid, its occurrence is concordant with the hypothesis that the superfamily reached all parts of Holarctica during the Paleogene.