The Ultimate Shrew is listed as endemic to Kenya, with a record near the Jombeni Range. It is known from montane moist forest; a comparative table gives a mean head-body length of 90 mm.
The Mammals of Africa comparison table lists a mean head-body length of 90 mm and a tail about 70% as long as the head-body length.
The Kenya checklist reports it from montane tropical moist forest.
An extinction-risk assessment has not been added yet.