Pectostraca

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pectostraca \Pec*tos"tra*ca\ (p[e^]k*t[o^]s"tr[.a]*k[.a]), prop.
     n. pl. [NL., fr. Gr. phkto`s fixed + 'o`strakon shell of a
     testacean.] (Zool.)
     A degenerate order of Crustacea, including the Rhizocephala
     and Cirripedia.
     [1913 Webster]