Olophrum consimile

Olophrum consimile (Gyllenhal, 1810) Omalium consimile Gyllenhal, 1810: 199. Omalium marginatum Kirby, 1837: 89. Olophrum alpestre Erichson, 1840: 867. Olophrum parvulum Mäklin, 1853: 195. Olophrum marginatum Mäklin, 1853: 196. Olophrum minor J. Sahlberg, 1876: 213. Olophrum limbatum Mäklin, 1878: 23. Olophrum parvipenne Scheerpeltz, 1929: 134. Olophrum recticolle Scheerpeltz, 1929: 141. Olophrum curtipenne Scheerpeltz, 1929: 143. Olophrum bernhauerianum Scheerpeltz, 1929: 146. Olophrum marginicolle Blair, 1933: 95. Olophrum yasudai Watanabe, 1990: 139 syn. n. Other notes and references see in Herman (2001). Material examined. JAPAN: HOKKAIDO: 1 ♀: Kushiro marsh, between Horo and Oshima rivers. 31.07.1991. A. Smetana leg. (CNC). Remarks. Olophrum consimile is one of the common species distributed in the Holarctic Region (Herman 2001). Olophrum yasudai was originally described from Kurodake Mt., Hokkaido. Dr. Watanabe compared it with O. consimile, and noted that it can be distinguished by “… the body narrower, the punctures on pronotum less dense, the punctures of elytra sparser and not arranged in longitudinal rows”. Based on the original description and illustration of the body (Fig. 141 in Watanabe (1990)) and the aedeagus (Figs 142–143 in Watanabe (1990)), this species is conspecific with O. consimile. Thus, it was synonymyzed with the latter species. This species is variable in body length, the shape of the significantly convex pronotum (elongate or slightly transverse), features of the punctation of the forebody (sparser or denser, larger or finer) and the shape of the apical portions of the parameres. It should be noted that the studied female from Hokkaido has a more transverse pronotum with sparser and larger punctation than that in Fig. 141 (Watanabe 1990).