Ceruchus ahualuo resembles C. niger, C. sinensis and C. yangi in body size and in the density of setae on the mesofemora, but carries a large finger-like tooth on the dorsal surface near the base of each mandible. This discrete character was not observed in any other examined species of Ceruchus. In the male genitalia the caudal margin of the basal piece of the aedeagus bears a shallow median emargination in ventral view, against an M-shaped margin in C. yangi and C. niger.
Diagnostic character results for Ceruchus ahualuo
Evidence: Diagnostic character results for Ceruchus ahualuo