This small shrew has been recorded in Mexican grasslands, rocky places, and vegetation beside streams. Its account describes a partly underground way of life.
The back is medium to dark brown and the underside paler. It has small eyes and ears, a short tail, and broad forefeet with short claws.
In Chiapas, Mexico, the Puebla Least Shrew has been recorded in cloud forest, pine–oak forest and a coffee plantation, across different elevations and vegetation types.
A 2019 paper brought together fieldwork conducted from 2002 to 2018. Researchers used one-litre pitfall containers and compared captures with museum specimens and identification keys. Four of the 22 shrews collected belonged to this species.
One came from cloud forest at 2,400 metres, one from a coffee plantation at 1,453 metres and two from pine–oak forest at 1,600 metres. Each preserved specimen linked the animal with a place and time, providing concrete evidence of the land it used.
An extinction-risk assessment has not been added yet.
The 2019 field researchers called for more targeted surveys and better knowledge of shrew ecology and distribution in Chiapas. Following this species in the forest and agricultural sites where it was recorded, alongside changes in land use, would provide a basis for habitat conservation.