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, 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.
Psydrinae is a subfamily of beetles in the family Carabidae.
Mecyclothorax blackburnianus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax aa is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax gagnei is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax kaukukini is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax punakukini is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax swezeyi is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax williamsi is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax purpuripennis is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2008.
Mecyclothorax convexus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax debiliceps is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax latissimus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax latus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax lisae is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax obscurus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax punctatostriatus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2006.
Mecyclothorax cordithorax is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2005.
Mecyclothorax superstriatus is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr in 2005.
Mecyclothorax oopteroides is a species of ground beetle in the subfamily Psydrinae. It was described by Liebherr & Marris in 2009.
