Parent taxon: Protrogomorpha according to Cope 1873
Sister taxa: Allomyidae, Anomalomyidae, Anomaluroidea, Aplodontoidea, Archetypomyidae, Bandaomys, Castoroidea, Cavina, Cricetopidae, Ctenohystrica, Downsimys, Ectropomys, Eryomyina, Geomyoidea, Gliridae, Luribayomys, Megacricetodontidae, Muriformia, Myodonta, Pairomys, Petauristidae, Quercymys, Sciuroidea, Siphneidae, Yuomyidae, Zamoramys, Ischyromyidae, Spalacoidea, Paciculus, Gliroidea, Ctenodactyloidea, Pedetoidea, Theridomyoidea, Castorimorpha, Anomaluromorpha, Ctenodactylomorpha, Glirimorpha, Alagomyidae, Laredomyidae, Pseudoparamys, Apletotomeus, Epeiromys, Floresomys, Griphomys, Jimomys, Marfilomys, Meliakrouniomys, Pipestoneomys, Prolapsus, Texomys, Paramyidae, Ischyromyoidea, Sciuravidae, Cylindrodontidae, Protoptychidae
Subtaxa: Heliscomys gregoryi, Heliscomys hatcheri, Heliscomys mcgrewi, Heliscomys ostranderi, Heliscomys senex, Heliscomys vetus, Heliscomys woodi
Type: Heliscomys vetus
Ecology: ground dwelling herbivore