Eupetaurus, , McKenna, 1962

Jackson, Stephen M., Li, Quan, Wan, Tao, Li, Xue-You, Yu, Fa-Hong, Gao, Ge, He, Li-Kun, Helgen, Kristofer M. & Jiang, Xue-Long, 2021, Across the great divide: revision of the genus Eupetaurus (Sciuridae: Pteromyini), the woolly flying squirrels of the Himalayan region, with the description of two new species, Zoological Journal of the Linnean Society 194 (2), pp. 502-526 : 19

KEY TO THE SPECIES OF EUPETAURUS

1a. Temporal ridges parallel. Rostrum wide. Upper cheek teeth round in shape; lower molars have two anterior fossettids .................................................................................................... Eupetaurus nivamons

1b. Temporal ridges converge posteriorly. Rostrum narrow. Upper cheek teeth heart shaped; lower molars have one anterior fossettid ............................................................................................................................. 2

2a. Cusps and ridges of cheek teeth are robust; P 4 and P 4 significantly larger than the following molars; lower molars are subsquare in shape; anterior fossettid short ......................................... Eupetaurus cinereus

2b. Cusps and ridges of cheek teeth are less robust; P 4 and P 4 approximately equal in size to the following molars; lower molars subrectangular in shape; anterior fossettid long ............... Eupetaurus tibetensis