Mecyclothorax ducalis group species, dorsal habitus view. A–B M. longidux. A (Waikamoi, 1310 m) B (Kuhiwa, 1585 m) C–D M. brevidux C (Pu‘u Ahulili, 1600 m) D (Kīpahulu, 1800 m).

 
 
  Part of: Liebherr JK (2015) The Mecyclothorax beetles (Coleoptera, Carabidae, Moriomorphini) of Haleakala-, Maui: Keystone of a hyperdiverse Hawaiian radiation. ZooKeys 544: 1-407. https://doi.org/10.3897/zookeys.544.6074