Diacheila polita (Faldermann, 1835)

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 261

Diacheila polita (Faldermann, 1835)

Blethisa polita Faldermann, 1835: 359. Type locality: "montes Altaici [Mongolia]" (original citation). Holotype [by monotypy] probably in ZILR.

Nebria xiaoxinganensis Li and Liang [in Li], 1992: 28. Type locality: "M[oun]t Xiaoxinganlieng, Yichun, Heilongjiang Province [China]" (original citation). Holotype (♂) location unknown. Synonymy established by Ledoux et al. (2003: 80).

Distribution.

This Holarctic species is known from scattered localities in Norway, European Russia, Siberia, Mongolia (Goulet 2003: 206), and northeastern China (Li 1992: 30, as Nebria xiaoxinganensis ) in the Palaearctic Region, and from Alaska to northwestern Northwest Territories [see Morgan and Morgan 1981: map 3] in the Nearctic Region. Fossil remnants of this species, believed to be 2.0-2.5 million years old, have been found in Greenland (Bennike and Böcher 1990: 336; Böcher 1995: 20); others, dated between about 12,000 and 21,500 years B.P., have been unearthed in Iowa and north-central Illinois (Baker et al. 1986: 96; Garry et al. 1990: 394; Schwert 1992: 76; Woodman et al. 1996: 17), northeastern Pennsylvania (Barnosky et al. 1988: 178), southern Ontario and southern Quebec (Morgan and Morgan 1981: 1107).

Records.

CAN: NT, YT USA: AK - Holarctic