Deltochilum valgum is a nocturnal species of dung beetle in the family Scarabaeidae, which has evolved a predatory lifestyle. While most other members of its family feed on faeces, D. valgum is highly specialised for eating millipedes; such a transition from scavenger to carnivore is rare. D. valgum is widely distributed in Central American rainforests. Two subspecies are recognised: D. v. acropyge Bates, 1887 and D. v. longiceps Paulian, 1938.