Tags: Crustacean.
Sessilia is an order of barnacles comprising the barnacles without stalks or acorn barnacles. They form a monophyletic group and are probably derived from stalked barnacles. The order is divided into three suborders. Brachylepadomorpha contains a single family Neobrachylepadidae while Verrucomorpha contains two families Verrucidae and Neoverrucidae. The remaining twelve families are in the suborder Balanomorpha.
