The Chadronian squirrel “Sciurus” JeffersoniDouglass, 1901: a new generic name, new material, and its bearing on the early evolution of Sciuridae (Rodentia)
作者： Robert J. Emry , William W. Korth
DOI: 10.1080/02724634.1996.10011366
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摘要: ABSTRACT A new genus, Douglassia, is erected for the problematic Chadronian sciurid Sciurus jeffersoni Douglass, 1901. Previously undescribed material adds morphologic information taxon. Douglassia differs from other sciurids in retention of primitive dental and masseteric morphology. Based on postcranial anatomy, genus referred to Tribe Sciurini (tree squirrels), which regarded as sister taxon all Sciurinae. The known fossil Tertiary flying squirrels inadequate determine whether they constitute a distinct family.
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