The asidine genera (Coleoptera: Tenebrionidae: Asidini) of North America

The asidine darkling beetles (Coleoptera: Tenebrionidae: Asidini) are a diverse tribe of flightless tenebrionids found in many arid and sub-arid habitats around the world. The nearly 300 species described from North America are restricted to the western half of the continent. Evolutionary relationships within and between the North American asidine genera were analyzed within a phylogenetic framework, utilizing both morphological and molecular data. A revised generic classification for the tribe is presented based on the results. Seven previously described genera are maintained as valid, three new genera were erected, and twenty genera were placed in synonymy. Morphological characters separating the genera are discussed, along with notes on their natural history and biogeography.