The large-toothed shrew is one of the larger members of Sorex, with a very dark back and tail. It occurs in eastern Mexico's mountain cloud forests, and its diet is thought to include small invertebrates and other food such as vertebrate carrion.
Head-and-body length is 79–84 mm and tail length is 49–52 mm. The back is very dark brown, the underside is slightly paler, and the tail is uniformly dark brown. It is relatively large for the genus.
Its diet is thought to include small invertebrates and vertebrate carrion. The handbook reports no information about its activity pattern.
An extinction-risk assessment has not been added yet.