Nelson's Big-toothed Deermouse is a member of a rodent genus found in Mexico. A skull study found that it has the largest skull among the genus's three species.
A morphological study reported that this species has the largest skull among the genus's three species. This is a skull comparison, not a comparison of whole-body size.
The genus is described as living in separated patches of cool, humid forest in highland areas. This species occurs in the Sierra Madre Oriental and Sierra Mazateca.
An extinction-risk assessment has not been added yet.