noun
Shirouma shrew
A subspecies of the Azumi shrew (Sorex hosonoi) endemic to the Shirouma mountain area in Japan. Scientific name: Sorex hosonoi shiroumanus.
シロウマトガリネズミは白馬岳周辺だけに生息する固有亜種です。
The Shirouma shrew is an endemic subspecies that lives only around Mount Shirouma.
Named after the Shirouma (白馬) mountain region where it is found, combined with トガリネズミ (shrew). The exact derivation of the subspecies name is straightforward from its geographic location.