Trechus obtusus Erichson, 1837

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 337

Trechus obtusus Erichson, 1837

Trechus laevis Stephens, 1835: 384 [potential nomen oblitum]. Type locality: "near London [United Kingdom]" (original citation). Syntype(s) location unknown (possibly in BMNH).

Trechus obtusus Erichson, 1837 [15 September]: 122 [potential nomen protectum]. Type locality: Mark Brandenburg [Prussia] (inferred from title of the book). Syntype(s) location unknown (possibly in ZMHB). Synonymy established by Waterhouse (1863: 148).

Trechus castanopterus Heer, 1837 [after 10 December]: 46 [second section]. Type locality: Matt; Andermatt [Switzerland] (Heer 1837: 73 [first section]). Syntype(s) location unknown (possibly in ETHZ). Synonymy established by Schaum (1860: 641).

Distribution.

This European species is adventive in North America where it is known from the Queen Charlotte Islands (Kavanaugh 1992: 61) to north-central Idaho (LaBonte 1989: 17; Hatten et al. 2007: 359), south to northern Utah (Davis and Salt Lake Counties, CMNH) and west-central California [see Kavanaugh and Erwin 1985: Fig. 1]. The first inventoried specimen collected on this continent was found in North Creek, King County, Washington in 1925 (Kavanaugh and Erwin 1985: 171). The species is also adventive in Hawaii since 1998 (Liebherr and Takumi 2003).

Records.

CAN: BC (QCI, VCI) USA: CA, ID, OR, UT, WA - Adventive