Trechus Clairville, 1806

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 332-333

Subgenus Trechus Clairville, 1806

Trechus Clairville, 1806: 22. Type species: Carabus rubens Fabricius, 1801 designated by Blanchard [in Audouin et al. 1841: plate 25].

Calotrechus Wollaston, 1854: 64. Type species: Trechus nigrocruciatus Wollaston, 1854 designated by Jeannel (1927: 114). Synonymy established by Casale and Laneyrie (1982: 124). Etymology. From the Greek calos (beautiful) and the generic name Trechus [q.v.] [masculine].

Antoinella Jeannel, 1937c: 83. Type species: Duvalius groubei Antoine, 1935 by original designation. Synonymy established by Casale (2011: 14). Etymology. This name was proposed in honor of Maurice Antoine (1886-1962). Born in Caen in Normandy, France, Antoine moved to Morocco in his 30s where he taught natural science at a secondary school in Casablanca from 1919 to 1948. He is well-known for his monographic treatment (1955-1962) of the carabid fauna of Morocco.

Altaiotrechus Iablokoff-Khnzorian, 1971: 155. Type species: Altaiotrechus alticola Iablokoff-Khnzorian, 1971 (= Trechus kuraicus Shilenkov, 1995) by monotypy. Synonymy established by Shilenkov (in Kryzhanovskij et al. 1995: 69). Etymology. From the geographical name altai (mountain system in Asia) and the generic name Trechus [q.v.] [masculine].

Hydrotrechus Carabajal, García and Rodríguez, 2000: 123. Type species: Hydrotrechus cantabricus Carabajal, García and Rodríguez, 2000 by original designation. Synonymy established by Ortuño and Jiménez-Valverde (2011: 28).

Diversity.

About 775 species in North America (23 species, of which three are adventive), mountains in Mexico (about five species), Oriental (two species in the Philippines), Palaearctic (about 725 species), and Afrotropical (about 25 species on Mont Elgon, Mont Meru, and Ethiopia) Regions. More than 95% of the species inhabit the Northern Hemisphere.

Identification.

There is no published key for the identification of the species of this subgenus.