RÖSSNER, E.; SCHÖNFELD, J.; AHRENS, D. Onthophagus (Palaeonthophagus) medius (Kugelann, 1792)—a good western palaearctic species in the Onthophagus vacca complex (Coleoptera: Scarabaeidae: Scarabaeinae: Onthophagini). Zootaxa, Auckland, New Zealand, v. 2629, n. 1, p. 1–28, 2010. DOI: 10.11646/zootaxa.2629.1.1. Disponível em: https://www.mapress.com/zt/article/view/zootaxa.2629.1.1. Acesso em: 26 jun. 2025.