Diplazon urupensis Uchida (stat. rev.)

Russia, Kuril islands: Paramushir Island, Inland from Severo-Kurilsk; N50°40.71' / E156°05.31', 0 5. VIII. 1997, leg. B.K. Urbain. 1♀. Shiashkotan, inland SW Zakatnaya Bay; N48°46.83' / E154°01.85', 29. VII. 2000, leg. T.R. Anderson. 1♀. Simushir Island, inland of NE Broutona Bay; N47°07.20' / E152°16.02', 0 2. VIII. 2000, leg. D.J. Bennett. 5♀.

This species was described from the Kuril islands by Uchida (1935). In a later publication (Uchida, 1957), he then synonymized it with D. pectoratorius . However, after studying the present specimens and consulting Uchida's holotype and allotype of the species (deposited at the Hokkaido University, Sapporo; label data of the holotype: "Uruppu; K.Doi" / " Holotype; Diplazon; urupensis; (Uch.)"), I decided to reinstate D. urupensis as a valid species (stat. rev.). The specimens are clearly smaller and more slender than D. pectoratorius, lack the orange coloration of the mesopleuron and mesosternum (except for a few males), and have weaker and sparser punctures on the mesoscutum and mesopleuron. It remains to be shown whether the Nearctic D. albotibialis Dasch (1964a), which has also been reported from Eastern and Western Russia (Manukyan, 1987, 2007), is a distinct species or a junior synonym of D. urupensis .

Known only from the Kuril islands.