Center for Systematic Entomology, Gainesville, Florida


Date of this Version



Warner WB. 2021. Two new scarab beetles from the southwestern USA (Coleoptera: Scarabaeidae: Melolonthinae and Aphodiinae). Insecta Mundi 0855: 1–15.


Copyright held by the author(s). This is an open access article distributed under the terms of the Creative Commons, Attribution Non-Commercial License,


Phyllophaga (Listrochelus) benwarneri new species and Cinacanthus cunninghami new species (Coleoptera: Scarabaeidae) are described from dune systems in northern Arizona and extreme southern Nevada, USA. Habitus and diagnostic characters of these species are illustrated, and couplets from the respective, most recent (sub)generic keys are modified to incorporate the new species. Available habits and habitat information for each species, and a discussion of the Phyllophaga “senex complex” of species are provided.

This work describes two new scarab beetles from the Southwestern USA, which are apparently restricted to dune systems in northern Arizona to extreme southern Nevada: one, an arenophilic Cinacanthus Schmidt species from dunes near the town of Moenkopi, Arizona, and the other, a flightless Phyllophaga Harris (Listrochelus Blanchard) “senex complex” species from unconsolidated dunes next to the town of Beaverdam, Arizona, and nearby dunes in Nevada. Both localities are known for having several precinctive species, including other flightless Scarabaeidae.