Horn-polymorphism
Guides
Onthophagus orpheus
Green-bronze Dung Beetle
Onthophagus orpheus is a dung beetle in the family Scarabaeidae, abundant in urban forests of the eastern United States. Males possess prominent thoracic horns used in combat for access to females, with horn size varying continuously across individuals. The species has been extensively studied for its sexual selection dynamics and serves as a model for urban adaptation in insects. A high-quality genome assembly has been published to support research on behavioral ecology and population genetics.