Crustacea, the Higher Taxa

J.K. Lowry

Thoracica (Cirripedia, Maxillipoda)

Common name. Acorn Barnacles, Stalked Barnacles, Wart Barnacles.

Description. Head. Rostrum absent; eyes absent; eyes naupliar eyes absent. Antennules (antenna 1) uniramous; peduncle and flagellum indistinguishable; exopod reduced, vestigial or absent. Antennae (antenna 2) reduced, vestigial or absent. Mandible uniramous; palp absent. Maxillipeds, absent. Thorax. Carapace present, univalved, enclosing head, body and appendages, forming a thick mantle, of calcareous plates or with spines. Thorax and abdomen differentiated. Peraeopods (legs) 6 pairs; biramous; non-phyllopodous; undifferentiated (simple). Abdomen absent. Uropods vestigial or absent. Telson absent.

Larval development. Eggs shed or deposited externally.

Habitat. Marine, brackish water; living on hard substrates, plants and animals.

Distribution. Worldwide.

Cite this publication as: Lowry, J.K. (1999 onwards). 'Crustacea, the Higher Taxa: Description, Identification, and Information Retrieval.' Version: 2 October 1999. http://crustacea.net/.