Mecyclothorax is a genus of beetles that contains over 400 described species or subspecies, mostly from the Hawaiian Islands, and Tahiti and Moorea, French Polynesia. Additional radiations have evolved in Queensland, Australia, New Guinea and New Caledonia. The genus has been divided into five subgenera: Eucyclothorax Liebherr 2018 of Australia, Qecyclothorax Liebherr 2018 of Queensland, Australia, Meonochilus Liebherr & Marris, 2009 of New Zealand, Phacothorax Jeannel 1944 of New Caledonia, and the more widely distributed subgenus Mecyclothorax Sharp 1903 [in Australia, the Sundas, New Zealand, the Society Islands (Moorea and Tahiti), and Hawaii]. The adelphotaxon to Mecyclothorax is hypothesized to consist of the genera associated with Amblytelus Blackburn, also distributed in Australia, and therefore the evolutionary history of Mecyclothorax commenced in Australia.
Species These 415 species belong to Mecyclothorax.
Mecyclothorax aa Liebherr, 2008 Mecyclothorax aano Liebherr, 2013 (Tahiti) Mecyclothorax abax Liebherr, 2006 Mecyclothorax acutangulus Perrault, 1988 (Tahiti) Mecyclothorax aeneipennis Liebherr, 2005 Mecyclothorax aeneus Sharp, 1903 (Oceania) Mecyclothorax affinis Liebherr, 2015 (Hawaii) Mecyclothorax ahulili Liebherr, 2015 (Hawaii) Mecyclothorax allostriatus Liebherr, 2011 (Hawaii) Mecyclothorax altiusculoides Perrault, 1987 (Tahiti) Mecyclothorax altiusculus (Britton, 1938) (Tahiti) Mecyclothorax amaroides Sharp, 1903 (Oceania) Mecyclothorax ambiguus (Erichson, 1842) (New Zealand and Australia) Mecyclothorax ambulatus Liebherr, 2015 (Hawaii) Mecyclothorax amingwiwae Liebherr, 2017 (New Guinea and Papua) Mecyclothorax amplipennis (Broun, 1912) (New Zealand) Mecyclothorax anaana Liebherr, 2012 (Tahiti) Mecyclothorax anchisteus Liebherr, 2015 (Hawaii) Mecyclothorax andersoni Liebherr, 2017 (New Guinea and Papua) Mecyclothorax angulosus Perrault, 1989 (Tahiti) Mecyclothorax angusticollis (Blackburn, 1878) (Oceania) Mecyclothorax annae Liebherr, 2006 Mecyclothorax antaeus Liebherr, 2015 (Hawaii) Mecyclothorax anthracinus Liebherr, 2015 (Hawaii) Mecyclothorax aorai Perrault, 1978 (Tahiti) Mecyclothorax apicalis (Sharp, 1903) (Oceania) Mecyclothorax aquilus Liebherr, 2015 (Hawaii) Mecyclothorax arboricola Liebherr, 2013 (Tahiti) Mecyclothorax arcanus Liebherr, 2011 (Hawaii) Mecyclothorax arcuatus Liebherr, 2006 Mecyclothorax argutor (Sharp, 1903) (Oceania) Mecyclothorax argutuloides Liebherr, 2015 (Hawaii) Mecyclothorax argutulus Liebherr, 2015 (Hawaii) Mecyclothorax arthuri Liebherr, 2015 (Hawaii) Mecyclothorax ata Perrault, 1978 (Tahiti) Mecyclothorax ataraensis Perrault, 1989 (Tahiti) Mecyclothorax ater Britton, 1948 (Oceania) Mecyclothorax bacrionis Liebherr, 2015 (Hawaii) Mecyclothorax badius Liebherr, 2011 (Hawaii) Mecyclothorax baehri B.Gueorguiev, 2013 (New Guinea and Papua) Mecyclothorax balli Perrault, 1978 (Tahiti) Mecyclothorax ballioides Perrault, 1978 (Tahiti) Mecyclothorax bartletti Liebherr, 2011 (Hawaii) Mecyclothorax basipunctus Louwerens, 1953 (Indonesia) Mecyclothorax bellorum (Liebherr, 2011) (New Zealand) Mecyclothorax bembidicus Sharp, 1903 (Oceania) Mecyclothorax bembidioides (Blackburn, 1879) (Oceania) Mecyclothorax bicolor Sharp, 1903 (Oceania) Mecyclothorax bicoloratus Liebherr, 2015 (Hawaii) Mecyclothorax bicoloris Liebherr, 2015 (Hawaii) Mecyclothorax bilaianus Baehr, 1998 (Indonesia and New Guinea) Mecyclothorax bilobatus Liebherr, 2015 (Hawaii) Mecyclothorax blackburni (Sloane, 1898) (Australia) Mecyclothorax blackburnianus Liebherr, 2008 Mecyclothorax bougainvillei Perrault, 1986 (Tahiti) Mecyclothorax bradycellinus Sharp, 1903 (Oceania) Mecyclothorax bradycelloides Liebherr, 2015 (Hawaii) Mecyclothorax bradyderus (Sharp, 1903) (Oceania) Mecyclothorax brevidux Liebherr, 2015 (Hawaii) Mecyclothorax brevipennis Perrault, 1984 (Tahiti) Mecyclothorax brevis (Blackburn, 1878) (Oceania) Mecyclothorax brispex Liebherr, 2017 (New Guinea and Papua) Mecyclothorax brittoni Perrault, 1978 (Tahiti) Mecyclothorax bryobioides Perrault, 1987 (Tahiti) Mecyclothorax bryobius (Britton, 1938) (Tahiti) Mecyclothorax carteri (Perkins, 1917) (Oceania) Mecyclothorax castaneus Perrault, 1986 (Tahiti) Mecyclothorax ceteratus Liebherr, 2011 (Hawaii) Mecyclothorax chalcosus (Sharp, 1903) (Oceania and Hawaii) Mecyclothorax claridgeiae Liebherr, 2013 (Tahiti) Mecyclothorax clermontianus Liebherr, 2011 (Hawaii) Mecyclothorax cognatus Sharp, 1903 (Oceania) Mecyclothorax comma Liebherr, 2006 Mecyclothorax consanguineus Liebherr, 2015 (Hawaii) Mecyclothorax consobrinus Liebherr, 2005 Mecyclothorax constrictus (Sharp, 1903) (Oceania and Tahiti) Mecyclothorax contractus Liebherr, 2015 (Hawaii) Mecyclothorax convexicollis (Emden, 1937) (Indonesia) Mecyclothorax convexus Liebherr, 2006 Mecyclothorax cooki Perrault, 1986 (Tahiti) Mecyclothorax cordaticollaris Liebherr, 2015 (Hawaii) Mecyclothorax cordaticollis (Blackburn, 1878) (Oceania) Mecyclothorax cordicollis (Sloane, 1900) (Australia) Mecyclothorax cordithorax Liebherr, 2005 Mecyclothorax crassuloides Liebherr, 2015 (Hawaii) Mecyclothorax crassulus Liebherr, 2015 (Hawaii) Mecyclothorax crassus (Sharp, 1903) (Oceania and Hawaii) Mecyclothorax cuccodoroi Baehr, 2002 (New Guinea and Papua) Mecyclothorax cupreoides Perrault, 1978 (Tahiti) Mecyclothorax cupreus Perrault, 1978 (Tahiti) Mecyclothorax cupripennis Perrault, 1989 (Tahiti) Mecyclothorax curtipes (Sharp, 1903) (Oceania) Mecyclothorax curtisi Liebherr, 2013 (Tahiti) Mecyclothorax curtus (Sloane, 1895) (Australia) Mecyclothorax cymindicus Sharp, 1903 (Oceania) Mecyclothorax cymindoides Liebherr, 2006 Mecyclothorax cymindulus Liebherr, 2015 (Hawaii) Mecyclothorax dannieae Perrault, 1978 (Tahiti) Mecyclothorax daptinus Sharp, 1903 (Oceania) Mecyclothorax darlingtoni Liebherr, 2018 (Australia) Mecyclothorax debiliceps Liebherr, 2006 Mecyclothorax debilis (Sharp, 1903) (Oceania) Mecyclothorax deverilli (Blackburn, 1879) (Oceania) Mecyclothorax discedens (Sharp, 1903) (Oceania) Mecyclothorax dispar Liebherr, 2015 (Hawaii) Mecyclothorax doesburgi Louwerens, 1949 (Indonesia) Mecyclothorax ducalis (Sharp, 1903) (Oceania) Mecyclothorax dunbarorum Liebherr, 2006 Mecyclothorax ehu Liebherr, 2013 (Tahiti) Mecyclothorax eipomeki Baehr, 1995 (Indonesia and New Guinea) Mecyclothorax eliti Baehr, 1995 (Indonesia and New Guinea) Mecyclothorax eplicatus (Broun, 1923) (New Zealand) Mecyclothorax everardi Liebherr, 2013 (Tahiti) Mecyclothorax ewingi Liebherr, 2006 Mecyclothorax excavatus Liebherr, 2011 (Hawaii) Mecyclothorax exilioides Liebherr, 2011 (Hawaii) Mecyclothorax exilis Britton, 1948 (Oceania and Hawaii) Mecyclothorax externestriatus Perrault, 1989 (Tahiti) Mecyclothorax eyrensis (Blackburn, 1892) (Australia) Mecyclothorax fairmairei Perrault, 1986 (Tahiti) Mecyclothorax fatata Liebherr, 2012 (Tahiti) Mecyclothorax fefemata Liebherr, 2013 (Tahiti) Mecyclothorax ferovipennis Liebherr, 2011 (Hawaii) Mecyclothorax ferruginosus Perrault, 1987 (Tahiti) Mecyclothorax filipes (Sharp, 1903) (Oceania) Mecyclothorax filipoides Liebherr, 2015 (Hawaii) Mecyclothorax filitarsis Liebherr, 2011 (Hawaii) Mecyclothorax flaviventris Liebherr, 2015 (Hawaii) Mecyclothorax flavolateralis Liebherr, 2006 Mecyclothorax flavomarginatus Britton, 1948 (Oceania and Hawaii) Mecyclothorax fleutiauxi (Jeannel, 1944) (New Caledonia) Mecyclothorax footei Liebherr, 2008 Mecyclothorax fosbergi Perrault, 1979 (Tahiti) Mecyclothorax fosbergioides Perrault, 1988 (Tahiti) Mecyclothorax foveolatus Liebherr, 2015 (Hawaii) Mecyclothorax foveopunctatus Liebherr, 2015 (Hawaii) Mecyclothorax funebris Liebherr, 2008 Mecyclothorax fuscus Perrault, 1989 (Tahiti) Mecyclothorax gagnei Liebherr, 2008 Mecyclothorax geminatus Liebherr, 2011 (Hawaii) Mecyclothorax georgettae Perrault, 1978 (Tahiti) Mecyclothorax gerardi Perrault, 1978 (Tahiti) Mecyclothorax giffardi Liebherr, 2005 Mecyclothorax giffini Liebherr, 2008 Mecyclothorax globicollis (Mandl, 1969) (Borneo and Indonesia) Mecyclothorax globosoides Perrault, 1989 (Tahiti) Mecyclothorax globosus Britton, 1948 (Tahiti) Mecyclothorax globulosus Perrault, 1978 (Tahiti) Mecyclothorax gourvesi Perrault, 1978 (Tahiti) Mecyclothorax gourvesioides Perrault, 1988 (Tahiti) Mecyclothorax goweri B.Moore, 1992 Mecyclothorax gracilicollis Liebherr, 2015 (Hawaii) Mecyclothorax gracilis (Sharp, 1903) (Oceania) Mecyclothorax granulatus Liebherr, 2006 Mecyclothorax granulipennis Liebherr, 2008 Mecyclothorax gressitti Liebherr, 2017 (New Guinea and Papua) Mecyclothorax haleakalae (Sharp, 1903) (Oceania) Mecyclothorax hamatus Perrault, 1987 (Tahiti) Mecyclothorax haydeni Liebherr, 2015 (Hawaii) Mecyclothorax hemisphaericus Perrault, 1989 (Tahiti) Mecyclothorax hephaestoides Liebherr, 2015 (Hawaii) Mecyclothorax hephaestus Liebherr, 2008 Mecyclothorax hoeahiti Liebherr, 2013 (Tahiti) Mecyclothorax howei B.Moore, 1992 Mecyclothorax hunapopoti Liebherr, 2013 (Tahiti) Mecyclothorax impressipennis Baehr, 2003 (Australia) Mecyclothorax improcerus Liebherr, 2011 (Hawaii) Mecyclothorax impunctatus Liebherr, 2006 Mecyclothorax inaequalis (Blackburn, 1878) (Oceania) Mecyclothorax incompositus Britton, 1948 (Oceania) Mecyclothorax inconscriptus Liebherr, 2015 (Hawaii) Mecyclothorax inflatus Baehr, 2003 (Australia) Mecyclothorax insolitus (Sharp, 1903) (Oceania) Mecyclothorax integer Sharp, 1903 (Hawaii) Mecyclothorax interruptus Sharp, 1903 (Oceania and Hawaii) Mecyclothorax invisitatus Liebherr, 2015 (Hawaii) Mecyclothorax irregularis Britton, 1948 (Oceania and Hawaii) Mecyclothorax isolatus Liebherr, 2018 (Australia) Mecyclothorax iteratus Sharp, 1903 (Oceania) Mecyclothorax jameswalkeri Liebherr, 2018 (Australia) Mecyclothorax jarrigei Perrault, 1978 (Tahiti) Mecyclothorax jeanneli Liebherr, 2018 (New Caledonia) Mecyclothorax jeanyvesi Liebherr, 2013 (Tahiti) Mecyclothorax jiwikae Baehr, 1995 (Indonesia and New Guinea) Mecyclothorax joni Liebherr, 2006 Mecyclothorax julianae Baehr, 1995 (Indonesia and New Guinea) Mecyclothorax kahalawaiae Liebherr, 2011 (Hawaii) Mecyclothorax kanak B.Moore & Liebherr, 2018 (New Caledonia) Mecyclothorax karschi (Blackburn, 1882) (Oceania) Mecyclothorax kaukukini Liebherr, 2008 Mecyclothorax kaumakani Liebherr, 2015 (Hawaii) Mecyclothorax kavanaughi Liebherr, 2008 (New Guinea and Papua) Mecyclothorax kayballae Liebherr, 2013 (Tahiti) Mecyclothorax kipahulu Liebherr, 2015 (Hawaii) Mecyclothorax kipwilli Liebherr, 2015 (Hawaii) Mecyclothorax kokone Liebherr, 2013 (Tahiti) Mecyclothorax konanus Sharp, 1903 (Oceania) Mecyclothorax konemata Liebherr, 2013 (Tahiti) Mecyclothorax krushelnyckyi Liebherr, 2015 (Hawaii) Mecyclothorax kubor Baehr, 2008 (New Guinea and Papua) Mecyclothorax kuiki Liebherr, 2015 (Hawaii) Mecyclothorax lackneri Baehr, 2008 (Indonesia and New Guinea) Mecyclothorax laetus (Blackburn, 1881) (Oceania) Mecyclothorax laevilateralis Perrault, 1989 (Tahiti) Mecyclothorax lahainae Britton, 1948 (Oceania and Hawaii) Mecyclothorax langdae Baehr, 1995 (Indonesia and New Guinea) Mecyclothorax lateralis (Laporte, 1867) (Australia) Mecyclothorax laterobustus Liebherr, 2018 (New Caledonia) Mecyclothorax laterorectus Liebherr, 2018 (New Caledonia) Mecyclothorax laterosinuatus Liebherr, 2018 (New Caledonia) Mecyclothorax laterovatulus Liebherr, 2018 (New Caledonia) Mecyclothorax latissimus Liebherr, 2006 Mecyclothorax latus Liebherr, 2006 Mecyclothorax lewisensis B.Moore, 1984 (Australia) Mecyclothorax lisae Liebherr, 2006 Mecyclothorax lissopterus Liebherr, 2006 Mecyclothorax lissus (Andrewes, 1933) (Indonesia) Mecyclothorax loebli Baehr, 2002 (New Guinea and Papua) Mecyclothorax longidux Liebherr, 2015 (Hawaii) Mecyclothorax longulus Sharp, 1903 (Oceania) Mecyclothorax lophoides (Chaudoir, 1854) (Australia)