A new genus, Tonomochota n. gen., and three new species, T. khasanensis n. sp., T. sikhotana n. sp., and T. major n. sp. of Ochotonidae are described from late Pleistocene cave deposits in the Russian Far East. The description of the new genus was based on thirty-two isolated lower third premolar from the sediments in the Sukhaya and Tetyukhinskaya caves. The new genus was primarily established based on the following characteristics: the triangular anteroconid of the lower third premolar always has a labial fold filled with cement; lingual fold of the anteroconid of the lower third premolar with or without cement; the re-entrant fold(s) on the anteroconid is directed laterally. All of the three new species differ significantly from each other in the size of the lower third premolar.

一个新属，Tonomochota n。gen., 和三个新种, T. khasanensis n. sp., T. sikhotana n. sp. 和T. Majorn. sp. Ochotonidae 是从俄罗斯远东的更新世晚期洞穴沉积物中描述的。对新属的描述基于来自 Sukhaya 和 Tetyukhinskaya 洞穴沉积物中的 32 个孤立的下三分之一前磨牙。新属的建立主要基于以下特征：下三分之一前磨牙的三角形前锥体总是有一个充满水泥的唇褶；有或没有骨水泥的下三分之一前磨牙的前锥体的舌皱襞；anteroconid 上的折返褶皱是横向的。所有三个新物种在下第三前磨牙的大小方面彼此显着不同。