Kohlmann, B. and Solís, Ángel 2025. A review of the species groups of the Western Hemisphere Onthophagus Latreille (Coleoptera: Scarabaeidae: Scarabaeinae) using COI barcoding and gene trees. Zootaxa. 5604, 4 (Mar. 2025), 401–447. DOI:https://doi.org/10.11646/zootaxa.5604.4.1.