Diacheila Motschulsky, 1844

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 260

Genus Diacheila Motschulsky, 1844

Diacheila Motschulsky, 1844: 74 (as Diaheila ). Type species: Harpalus arcticus Gyllenhal, 1810 designated by Lacordaire (1854: 47). Etymology. Probably from the Greek dia (through, between, during) and cheilos (lip, by extension either labrum [upper lip] or labium [lower lip]) [feminine]. Note. Motschulsky (1844) originally used two different spellings for the name of this genus: Diacheila (pages 13, 76, v) and Diaheila (pages 15, 74). He subsequently used Diachila (Motschulsky 1850a: vi, 17; 1864: 195) and Diaheila (Motschulsky 1869: 10). Following article 24.2.4 (ICZN 1999), Diaheila should be the correct original spelling. Diacheila is an incorrect spelling but since it is in prevailing usage and attributed to the publication of the original spelling, it is deemed to be the correct original spelling (ICZN 1999: Article 33.3.1).

Arctobia C.G. Thomson, 1857: 16. Type species: Harpalus arcticus Gyllenhal, 1810 by monotypy. Etymology. From the Greek arctos (north) and bios (life) [feminine].

Diversity.

Three species in the arctic and subarctic areas of the Nearctic (two Holarctic species) and Palaearctic (three species) Regions.

Identification.

Lindroth (1954a) reviewed the species and provided a key for their identification. The two species found in North America were also covered in his monograph of the Carabidae of Canada and Alaska (Lindroth 1961a: 102-104).

Taxonomic Note.

Goulet (1983: 447) regarded Diacheila as the sister-group to { Blethisa + Elaphrus }.