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Shun-Ichi UENO and German Sh. LAFER
Two Relatives of Trechus nakaguroi (Coleoptera, Trechinae), with Notes on the Trechus Fauna of Northeast Asia.
Bull. Natn. Sci. Mus., Tokyo, Ser. A, 20 (3), pp. 111-126, September 22, 1994
Abstract.
Systematic status of two Trechus species previously considered to belong to
T. (s. str.) nakaguroi is scrutinized mainly on the basis of a comparative study of their
male genitalia. One of them is described as a distinctive new species, T. sikhotealinus.
The other is considered to be a full species, T. sachalinensis, though differentiation
between this and T. nakaguroi is at a sibling stage. Brief notes are also given on the
other species of the subgenus Trechus (s. str.) from Northeast Asia.