Thecostraca are a subclass of marine invertebrates containing about 1,320 described species. Many species have planktonic larvae which become sessile or parasitic as adults. The most important subgroup are the barnacles (infraclass Cirripedia), constituting about 1,220 known species. The subgroup Facetotecta contains a single genus, Hansenocaris, ...
Found on
http://en.wikipedia.org/wiki/Thecostraca
(from the article `crustacean`) ...pairs of head appendages; single, simple, median eye; antennules uniramous; maxillae usually present; up to 11 trunk segments.Subclass ...
Found on
http://www.britannica.com/eb/a-z/t/34
No exact match found.
