Genus: Tsoabichi BROCHU, 2010
Etymology: Shoshoni, tso'abichi, "monster"; in reference to the species occurrence in land historically inhabited by the Shosoni people.
Species: greenriverensis BROCHU, 2010
Etymology: In reference to its occurrence in the Green River Fromation and Green River Basin.
Holotype: TMM 42509-1
Locality: Wyoming (No other locality data given).
Horizon: Green River Formation.
Age: Wastchian North Americna Land Mammale Age (NALMA), Lower Eocene Epoch, Paleogene Period, Lower Tertiary Subera, Lower Cenozoic Era.
Material: Skull lacking premaxillae, mandible, several ostoderms and single hyoid ossification
USNM 9301: Skull and associated vertebrae, pectoral girdle/limb elements and osteoderms.
AMNH 3666: Anterior half of skull.
UCM 101064: Partial disarticulated skeletal material possibly representing multiple individuals.
FMNH PR 1793: Cast of complete, articulated juvenile skeleton in private collection.