†subfamily Helohyinae Marsh 1877 (even-toed ungulate)
Mammalia - Artiodactyla - Dichobunidae
Full reference: O. C. Marsh. 1877. Introduction and succession of vertebrate life in America. The American Journal of Science and Arts, series 3 14(83):337-378
Parent taxon: Dichobunidae according to C. L. Gazin 1955
Sister taxa: Aksyiria, Cadutherium, Chorlakkia, Diacodexinae, Dichobuninae, Dulcidon, Eurodexeinae, Haqueina, Hyperdichobuninae, Lantianiinae, Mioachoerus, Neochorlakkia, Pakibune, Paraphenacodus, Wutuhyus
Subtaxa: none
Ecology: ground dwelling frugivore-omnivore
Distribution: found only at Badwater Locality 7 (Eocene of Wyoming)