Phyllocarida
Encyclopedia
Phyllocarida is a subclass of crustacean
s, comprising the extant order Leptostraca
and the extinct orders Hymenostraca and Archaeostraca.
Crustacean
Crustaceans form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The 50,000 described species range in size from Stygotantulus stocki at , to the Japanese spider crab with a leg span...
s, comprising the extant order Leptostraca
Leptostraca
Leptostraca is an order of small, marine crustaceans. Its members, including the well-studied Nebalia, occur throughout the world's oceans and are usually considered to be filter-feeders. It is the only extant order in the subclass Phyllocarida...
and the extinct orders Hymenostraca and Archaeostraca.