Sorex (Otisorex) portenkoi Stroganov 1956

Sorex (Otisorex) portenkoi Stroganov 1956, Proc. Inst. Biol. W. Siberian Branch Acad. Sci. USSR, Zool., 1: 11-14.

Type Locality: Russia, Koryaksk. Auv. Okr. "bliz pos Anadyr', poberejhe Anadyrsk limana [near Anadyr' settlement, shore of Anadyr' estuary]." .

Vernacular Names: Portenko's Shrew.

Distribution: NE Siberia.

Conservation: IUCN – Lower Risk (lc).

Discussion: Subgenus Otisorex; S. cinereus group (Demboski and Cook, 2003). Originally described as a subspecies of cinereus and treated as such by Yudin (1972) and Okhotina (1977), then included in ugyunak (Ivanitskaya and Kozlovsky, 1985), but recently recognized as a distinct species by Zaitsev (1988), and van Zyll de Jong (1991 b), who, however, pointed out its close relationship to jacksoni and ugyunak .