Tsaganomys altaicus is an extinct species of rodent from Asia, and the only species in the genus Tsaganomys.

Junior synonyms and likely junior synonyms: Cranial Anatomy and Phylogenetic Position of Tsaganomys altaicus (Mammalia: Rodentia) from the Hsanda Gol Formation (Oligocene), Mongolia, American Museum Novitates, Number 3156, December 29, 1995 Cyclomylus lohensis Cyclomylus minutus Sepulkomys eboretus Beatomus bisus Pseudotsaganomys mongolicus Pseudotsaganomys turgaicus

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