Here you will find one or more explanations in English for the word Pectostraca.
Also in the bottom left of the page several parts of wikipedia pages related to the word Pectostraca and, of course, Pectostraca synonyms and on the right images related to the word Pectostraca.
Pectostraca
Pectostraca Pec*tos"tra*ca, n. pl. [NL., fr. Gr. ? fixed + ?
shell of a testacean.] (Zo["o]l.)
A degenerate order of Crustacea, including the Rhizocephala
and Cirripedia.
Meaning of Pectostraca from wikipedia