Trechus Carabus rubens Trechus Carabus meridianus Acupalpus Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico Bousquet, Yves ZooKeys 2012 2012-11-28 245 1 1722 8KZB9 CDDE50C0-EF71-C007-68CA-EDB7B249B9E3 Clairville, 1806 Clairville 1806 Insecta Carabidae Trechus GBIF Animalia Trechus Coleoptera 331 332 Arthropoda genus   TrechusClairville, 1806: 22. Type species:  Carabus rubensFabricius, 1801 designated by Blanchard [in Audouin et al. 1841: plate 25]. Etymology. From the Greek trechis(runner), probably alluding to the quickness of the adults in the field [masculine]. Note. As stated by Andrewes (1939: 157), the first valid type species designation for  TrechusClairville, 1806 is that of Latreille (1810: 426) who designated  Carabus meridianusLinnaeus, 1760. This species is also the type species of  AcupalpusLatreille, 1829. Acceptance of Latreille'sdesignation would require nomenclatural changes for two extensive, well-known genera. A request should be addressed to the International Commission on Zoological Nomenclature to suppress Latreille'sdesignation. A first request was postponed (ICZN 1950).  Diversity. About 870 species arrayed in eight subgenera:  ArabotrechusMateu (one Yemenite species),  AtlantotrechusLompe (one species in the Madeira Islands),  ElgonophyesJeannel (one Afrotropical species),  ElgonotrechusJeannel (14 Afrotropical species),  MeruitrechusJeannel (two Afrotropical species),  Microtrechus(41 species),  MinitrechusVigna Taglianti and Magrini(one species in Ethiopia), and  Trechuss.str. (about 775 species). More than 92% of the species are found in the Palaearctic Region.