Sorex yukonicus

Directly from Woodman (2018): 'The taxon Sorex yukonicus Dokuchaev, 1997 was described for the North American representatives of S. minutissimus, but Hope et al. (2010) determined that S. yukonicus and Siberian S. minutissimus are conspecific. Despite this, North American S. minutissimus appears to represent a weakly differentiated clade (Hope et al., 2010), which is why I recognize it herein as a subspecies." Redirect to Sorex minutissimus.

References

Hope AG, Waltari E, Dokuchaev NE, Abramov S, Dupal T, Tsvetkova A, Henttonen H, MacDonald SO, Cook JA. 2010. High-latitude diversification within Eurasian least shrews and Alaska tiny shrews (Soricidae). Journal of Mammalogy 91(5): pp.1041-1057.

Woodman N. 2018. American Recent Eulipotyphla: Nesophontids, Solenodons, Moles, and Shrews in the New World. Smithsonian Institution Scholarly Press. Book. https://doi.org/10.5479/si.1943-6696.650