†Apletotomeus Heliscomys Passaliscomys Tylionomys Heliscomyidae is a family of extinct rodents from the mid-Tertiary of North America related to pocket gophers (family Geomyidae) and kangaroo rats and their relatives (family Heteromyidae).

McKenna and Bell (1997) placed the first two genera in synonymy, with Heliscomys as the senior synonym.

Heliscomyids are distinguished from other geomyoid rodents by several characteristics of the skull including the fusion of three cranial foramina, elongation of the incisive foramina, and an unusual position of the mental foramen (Korth et al., 1991).

Heliscomyidae is a member of the clade Geomyoidea, a group of rodents that also includes the families †Eomyidae, †Florentiamyidae, Heteromyidae, and Geomyidae.

The following cladogram showing interrelationships among geomyoid families follows Korth et al. (1991): †Eomyidae †Heliscomyidae †Florentiamyidae Geomyidae (pocket gophers) Heteromyidae (kangaroo rats and mice, pocket mice)