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Crustaceans

Any member of the class of arthropods that includes lobsters, crabs, shrimps, wood lice, water fleas, and barnacles.

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Crustaceans

celation
Animals; Crustaceans

Type of valve sculpture: elaboration (tegmen) of outer layer which overlapsand obscures underlying ornamentation.

solum
Animals; Crustaceans

Type of valve sculpture: in single mesh (fossa) or reticulate pattern, central space or depression surrounded by walls (muri).

foveola
Animals; Crustaceans

Type of valve sculpture: minute pit (one order of magnitude smaller than punctum). (elliptical, irregular, rounded, stellate).

fenestra
Animals; Crustaceans

Type of valve sculpture: one in a series openings either in ridge (carina) or wall (murus) of reticulate pattern.

knob
Animals; Crustaceans

Type of valve sculpture: Prominent protuberance. Larger than node and differentiated from surrounding area by distinct angulation.

true lobsters
Animals; Crustaceans

Members of the family Nephropidae; have large claws and a stiff tail fan.

decapod crustaceans
Animals; Crustaceans

Members of the order decapoda, class Malacostraca, superclass Crustacea, phylum Arthropoda; have five pairs of thoracic legs. Examples are shrimps, lobsters, crabs, and hermit crabs.

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