Trechus es un género de coleópteros adéfagos de la familia Carabidae. Sus especies se distribuyen por el holártico, la mitad norte de África y el subcontinente indio.
Especies Se reconocen las siguientes: Trechus acco Ueno, 1991 Trechus achillecasalei Deuve, 1998 Trechus acuticollis Sciaky & Pavesi, 1994 Trechus aduncus Barr, 1962 Trechus adustus Jeannel, 1962 Trechus aedeagalis Schmidt, 2009 Trechus aethiopicus Alluaud, 1918 Trechus agni Deuve & Quinnec, 1985 Trechus agouzicus Deuve & Queinnec, 1992 Trechus akibensis Belousov, 1990 Trechus akkusianus Donabauer, 2005 Trechus aksuensis Belousov & Kabak, 1996 Trechus alajensis Belousov & Kabak, 1994 Trechus alanicus Belousov, 1990 Trechus albanicus Apfelbeck, 1907 Trechus algiricus Jeannel, 1922 Trechus alicantinus Español, 1971 Trechus alinae Dajoz, 1990 Trechus almonius Reitter, 1903 Trechus alpicola Sturm, 1825 Trechus alpigradus Reitter, 1888 Trechus alticola Wollaston, 1854 Trechus altitudinum Deuve, 2004 Trechus amasraensis Donabauer, 2004 Trechus ambarensis Jeannel, 1954 Trechus amblus Jeannel, 1935 Trechus amblygonellus Jeannel, 1964 Trechus amblygonus Jeannel, 1935 Trechus ambrolauricus Belousov, 1989 Trechus amharicus Ortuño & Novoa, 2011 Trechus amicorum P. Moravec & Wrase, 1998 Trechus amplicollis Fairmaire, 1859 Trechus anae Morvan, 1982 Trechus angelicae Reitter, 1892 Trechus angulifer Belousov & Kabak, 1992 Trechus angusticeps Apfelbeck, 1904 Trechus angusticollis Kiesenwetter, 1850 Trechus anichtchenkoi Toribio, 2012 Trechus animosus Jeannel, 1962 Trechus anjuensis Deuve, 1998 Trechus antonii Jeannel, 1936 Trechus antonini Deuve, 1998 Trechus apache Dajoz, 1990 Trechus apicalis Motschulsky, 1845 Trechus apoduvalipenis Salgado Costas & Ortuño, 1998 Trechus apusenicus P. Moravec, 1986 Trechus aquilus Jeannel, 1962 Trechus arambourgi Jeannel, 1935 Trechus arizonae Casey, 1918 Trechus armenus Iablokoff-Khnzorian, 1963 Trechus arnoldii Belousov, 1987 Trechus arrecheaiVicente M. Ortuño, Eva Cuesta, José D. Gilgado & Enrique Ledesma. 2014. A new hypogean Trechus Clairville (Coleoptera, Carabidae, Trechini) discovered in a non-calcareous Superficial Subterranean Habitat of the Iberian System (Central Spain). Zootaxa 3802 (3): 359–372. Ortuño, Cuesta, Gilgado & Ledesma, 2014 Trechus arribasi Jeanne, 1988 Trechus arsenjevi Jeannel, 1962 Trechus arshanicus Belousov & Kabak, 2001 Trechus artemisiae Pulseys, 1872 Trechus arthuri P. Moravec & Lompe, In Lobl & Smetana, 2003 Trechus asetosus Ueno, 1997 Trechus asiaticus Jeannel, 1927 Trechus assingi Lompe, 1999 Trechus astrophilus Schmidt, 2009 Trechus atomus P. Moravec & Wrase, 1998 Trechus aubei Pandelle, 1867 Trechus aubryi Coiffait, 1953 Trechus austriacus Dejean, 1831 Trechus aveyronensis Fauvel, 1882 Trechus avgolensis Belousov & Kabak, 1998 Trechus aztec Jeannel, 1920 Trechus babaulti Jeannel, 1935 Trechus babinjensis Jeannel, 1927 Trechus badius Jeannel, 1960 Trechus badzhalicus Plutenko, 2004 Trechus bajankoli Belousov & Kabak, 1992 Trechus bakeri Jeannel, 1923 Trechus bakurovi Shilenkov, 1984 Trechus balfourbrownei Ueno, 1965 Trechus balkaricus Belousov, 1990 Trechus balsamensis Barr, 1962 Trechus bannaticus Dejean, 1831 Trechus barahbisensis Deuve, 1988 Trechus barbaritae Donabauer, 2004 Trechus barberi (Jeannel, 1931) Trechus barii Focarile, 1949 Trechus barnevillei Pandelle, 1867 Trechus barratxinai Español, 1971 Trechus basarukini P.Moravec & Wrase, 1997 Trechus basilewskyi Jeannel, 1960 Trechus baskonicus Belousov & Kabak, 1996 Trechus bastianinii Magrini & Sciaky, 2006 Trechus bastropi Schmidt, 2009 Trechus batuensis Magrini & Sciaky, 2006 Trechus batyr Belousov & Kabak, 1992 Trechus bayanbulak Deuve, 1993 Trechus baztanensis Dupre, 1991 Trechus beatus Reitter, 1903 Trechus bedeli Jeannel, 1922 Trechus beesoni Jeannel, 1930 Trechus beghinorum Belousov & Kabak, 1992 Trechus beieri Winkler, 1936 Trechus belovi Belousov & Kabak, 1996 Trechus beltrani Toribio, 1990 Trechus benahoaritus Machado, 1989 Trechus benesi Deuve, 1993 Trechus bensai Jeannel, 1927 Trechus besucheti Pawlowski, 1977 Trechus besuchetianus Deuve, 1987 Trechus beusti (Schaufuss, 1863) Trechus bhadarwahensis Deuve, 1982 Trechus bhutanicus Ueno, 1977 Trechus bibulus Lompe, 1999 Trechus biharicus Meixner, 1912 Trechus bipartitus Raffray, 1880 Trechus bodemeyeri Reitter, 1913 Trechus bodius Jeannel, 1960 Trechus bogatshevi Belousov, 1987 Trechus bogdani Belousov & Kabak, 2000 Trechus bogdoensis Belousov & Kabak, 2001 Trechus boghinorum Belousov & Kabak, 1992 Trechus bohaci P. Moravec, 1987 Trechus bohemorum Pawlowski, 1973 Trechus boleslavi Belousov & Kabak, 2000 Trechus boludagensis Donabauer, 2006 Trechus bonvouloiri Pandelle, 1867 Trechus bordei Peyerimhoff, 1909 Trechus bosnicus Ganglbauer, 1891 Trechus boudikae Morvan, 1982 Trechus bouilloni Faille, Bourdeau & Fresneda, 2012 Trechus boulbeni Deuve, 1998 Trechus bourdeaui Fresneda, Valenzuela & Faille, 2015Fresneda, Javier, Enrique Valenzuela, and Arnaud Faille. "Un nuevo Trechus Clairville, 1806, hipogeo troglobiomorfo de Asturias, España (Coleoptera, Carabidae, Trechinae)." Bulletin de la Société entomologique de France 120.3 (2015): 403-409. Trechus bousqueti Deuve, 1988 Trechus bowlingi Barr, 1962 Trechus bradycelliformis Csiki, 1906 Trechus brancuccii Deuve, 2006 Trechus brembanus Focarile, 1949 Trechus brendelli Deuve, 2005 Trechus breuili Jeannel, 1913 Trechus breuningi Morvan, 1972 Trechus brevicaudis Belousov & Kabak, 1993 Trechus brevicorpus Belousov & Kabak, 1993 Trechus brezinai Deuve & Queinnec, 1992 Trechus bruckii Fairmaire, 1862 Trechus bruckoides Faille, Bourdeau & Fresneda, 2012 Trechus buahitensis Jeannel, 1954 Trechus budhaensis Schmidt, 2009 Trechus byzantinus Apfelbeck, 1901 Trechus cabrerai (Jeannel, 1936) Trechus calashensis Deuve, 1982 Trechus caliginis Barr, 1985 Trechus cameroni Jeannel, 1923 Trechus cantalicus Fauvel, 1888 Trechus cappadocicus Pawlowski, 1976 Trechus caprai Jeannel, 1927 Trechus cardioderus Putzeys, 1870 Trechus carnioliae J. Muller, 1921 Trechus carolinae Schaeffer, 1901 Trechus carpaticus Rybinski, 1902 Trechus carrilloi Toribio & Rodríguez, 1997 Trechus caspiricus Deuve, 1982 Trechus castificus P. Moravec & Wrase, 1998 Trechus cathaicus Sciaky & Pavesi, 1995 Trechus caucasicus Chaudoir, 1846 Trechus cautus Wollaston, 1854 Trechus cavernicola J. Frivaldszky, 1881 Trechus ceballosi Mateu, 1953 Trechus centralis Nonvellier, Pavieevie & Popovie, 1994 Trechus cephalonicus Winkler, 1914 Trechus cephalotellus Belousov, 1995 Trechus ceresai Binaghi, 1938 Trechus chaklaensis Schmidt, 2009 Trechus chalybeus Dejean, 1831 Trechus championi Jeannel, 1920 Trechus chappuisi Jeannel, 1935 Trechus cheoahensis Donabauer, 2005 Trechus chillalicus Jeannel, 1936 Trechus chinensis Jeannel, 1920 Trechus chodjaii Morvan, 1974 Trechus chokensis Pawlowski, 2001 Trechus cholaensis Deuve, 1996 Trechus chomolungma Deuve & Queinnec, 1985 Trechus chormaensis Deuve, 1993 Trechus cifrianae Ortuño & Jiménez-Valverde, 2011 Trechus claudiae Deuve, 1996 Trechus clingmanensis Donabauer, 2005 Trechus coelestis Sciaky & Pavesi, 1994 Trechus coloradensis Schaeffer, 1915 Trechus compactulus Belousov & Kabak, 1996 Trechus compsus Jeannel, 1935 Trechus concinnus Tschitscherine, 1904 Trechus concoloratus Lorenz, 1998 Trechus conformis Jeannel, 1927 Trechus consobrinus K. Daniel & J. Daniel, 1898 Trechus constrictus Schaum, 1860 Trechus controversus Binaghi, 1959 Trechus crassiscapus Lindroth, 1955 Trechus croaticus Dejean, 1831 Trechus croceus Fresneda & Bourdeau en Fresneda et al., 2019Fresneda, J., Valenzuela, E., Bourdeau, C. & Faille, A. 2019. Nouvelles espèces de Trechus Clairville, 1806 du clade de T. saxicola des monts Cantabriques, Asturies, Espagne – biogéographie et spéciation (Coleoptera : Carabidae : Trechinae). Annales de la Société entomologique de France (N.S.) 55(1): 17–47. Trechus crucifer Piochard de la Brulerie, 1876 Trechus cryobius Jeannel, 1935 Trechus cryptophilus Belousov & Kabak, 1992 Trechus culminicola Jeannel, 1936 Trechus cumberlandus Barr, 1962 Trechus cuniculorum Mequignon, 1921 Trechus curticollis Fairmaire, 1866 Trechus curvatilis Belousov & Kabak, 1998 Trechus custos Wollaston, 1854 Trechus cyclomus Jeannel, 1954 Trechus cyprinus Franz, 1987 Trechus dacatrianus Deuve, 1996 Trechus dakushitaicus Deuve, 2004 Trechus damchungensis Deuve, 1998 Trechus daoensis Belousov & Kabak, 2001 Trechus davanensis Sciaky & Pavesi, 1994 Trechus davidiani Belousov, 1990 Trechus davidwrasei Donabauer, 2007 Trechus dayanae Assmann & Wrase, 2012 Trechus debilis Wollaston, 1871 Trechus decolor Jeannel, 1938 Trechus degienensis Jeannel, 1954 Trechus delarouzeei Pandelle, 1867 Trechus deliae Morvan, 1971 Trechus demircapicus P. Maravac, 1986 Trechus demissus Jeannel, 1962 Trechus densicornis Fischhuber, 1977 Trechus depressipenis Sciaky & Pavesi, 1995 Trechus detersus Wollaston, 1864 Trechus dichrous Reitter, 1911 Trechus diecki Putzeys, 1870 Trechus dilizhanicus Belousov, 1989 Trechus dilutus Wollaston, 1854 Trechus dimorphicus Pawlowski, 2001 Trechus diogenes Pawlowski, 1979 Trechus dioscuricus Belousov, 1990 Trechus distigma Kiesenwetter, 1851 Trechus distinctus Fairmaire & Laboulbene, 1854 Trechus doderoi Jeannel, 1927 Trechus dolomitanus Jeannel, 1931 Trechus donabaueri Lebenbauer, 2004 Trechus dongulaensis Schmidt, 2009 Trechus dorsistriatus A. Morawitz, 1862 Trechus dostali Donabauer, 2007 Trechus dubiatus Reitter, 1903 Trechus dudkorum Belousov & Kabak, 1996 Trechus dulat Belousov & Kabak, 1992 Trechus dumitrescui Decou, 1959 Trechus duvalioides Deuve, 2004 Trechus dzermukensis Iablokoff-Khnzorian, 1963 Trechus dzhalair Belousov & Kabak, 1994 Trechus dzhungaricus Belousov & Kabak, 1992 Trechus dzykhvensis Belousov, 1990 Trechus egorovi Belousov & Kabak, 1996 Trechus egregius Jeannel, 1927 Trechus elburzensis Morvan, 1974 Trechus elegans Putzeys, 1847 Trechus elgonicus Jeannel, 1930 Trechus elongatulus Putzeys, 1870 Trechus enedaphos Fresneda & Valenzuela en Fresneda et al., 2019 Trechus enigmaticus Coiffait, 1971 Trechus enoploides Jeannel, 1954 Trechus enoplus Jeannel, 1935 Trechus ephippiatus Bates, 1873 Trechus epirotes Colas, 1957 Trechus eremita Schmidt, 2009 Trechus erythrostomus Deuve, 1987 Trechus escalerai Abeille de Perrin, 1903 Trechus eutrechoides Deuve, 1992 Trechus exilipenis Belousov & Kabak, 1994 Trechus fairmairei Pandelle, 1867 Trechus felix Wallaston, 1864 Trechus ferghanicus Belousov & Kabak, 1992 Trechus fischtensis Reitter, 1888 Trechus flavocinctus Jeannel, 1922 Trechus flavocircumdatus Jeannel, 1922 Trechus flavolimbatus Wollaston, 1863 Trechus flavomarginatus Wollaston, 1854 Trechus focarilei Monguzzi, 1998 Trechus folwarcznyi Deuve, 1998 Trechus fongondi Denve & Queinnec, 1983 Trechus fontinalis Rybinski, 1901 Trechus fortimanus Reitter, 1903 Trechus fortipes Ueno, 1999 Trechus fortunatus Jeannel, 1927 Trechus franzianus Mateu & Deuve, 1979 Trechus franzschuberti Donabauer, 2006 Trechus fritzbeneschi Donabauer, 2006 Trechus fulvatilis Belousov & Kabak, 1998 Trechus fulvus Dejean, 1831 Trechus fusculus Motschulsky, 1850 Trechus gagrensis Jeannel, 1927 Trechus galianus Belousov, 1989 Trechus galicicaensis Gueorguiev & Hristovski, 2010 Trechus gallaecus Jeannel, 1921 Trechus gallorites Jeannel, 1936 Trechus gamae Reboleira & Serrano, 2009 Trechus gansuensis Deuve & Queinnec, 1993 Trechus genevanorum Pawlowski, 1977 Trechus gigas Pawlowski, 2001 Trechus gitzeni Belousov & Kabak, 2001 Trechus glabratus Schmidt, 2009 Trechus glacialis Heer, 1837 Trechus gloriensis Jeanne, 1971 Trechus goebli Breit, 1914 Trechus goidanichi Focarile & Casale, 1978 Trechus goliath Belousov & Kabak, 1992