Mesozoic-origin

Guides

• Ceratocanthinae

  Pill Scarab Beetles

  Ceratocanthinae is a subfamily of scarabaeoid beetles within Hybosoridae, comprising approximately 366 species in 43 genera distributed across three tribes. These small beetles (2.0–10.0 mm) are renowned for their unique ability to perform complete conglobation—rolling their body into a tight ball by curling three body trunk segments and folding their tibiae. This defensive behavior, which evolved once in the Mesozoic, represents the only known complete conglobation in insects and is supported by specialized exoskeletal structures and thickened, mechanically reinforced dorsal cuticle.

  conglobationdefensive-behaviormyrmecophilytermitophilyflightlessdead-wood-habitatfungal-associationMesozoic-originenrollment-coaptationpill-beetle