Mecyclothorax ducalis group species, dorsal habitus view. A M. aquilus (Kīpahulu, 915 m) B M. insolitus (Waikamoi, 1310 m) C M. invisitatus (Opana, 1293 m) D M. ducalis (Olinda to Ukulele Camp, 1210–1365 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