The Rock Mouse is listed from Mexico in the current mammal database. A 2010 species account describes large ears and a bicolored tail slightly longer than the head and body.
A 2010 account, written before the taxonomic revision, describes mice then assigned this name as medium-sized for the genus, with large ears and a bicolored tail slightly longer than head-and-body length.
A study published in 1997 examined a Durango population then assigned this name, before the taxonomic revision, in manzanita-oak shrubland and reported age- and sex-related differences in microhabitat use during breeding season.
An extinction-risk assessment has not been added yet.