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Crustaceans

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

Industry: Animals

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Crustaceans

subesophageal mass
Animals; Crustaceans

Concentration of nerve tissue below (posterior to) esophagus. Connected to supraesophageal ganglion by pair of esopha-geal connectives. Consists of ganglia of mandibles, maxillules, maxillae, ...

aesthetasc seta
Animals; Crustaceans

Confined to antennule; thin-walled, smooth, non-tapering seta, rounded tip; without pore; annulus not evident.

median protuberance
Animals; Crustaceans

Conspicuous elevation, sometimes platelike, arising from the posteromedian part of the penultimate (XIII) thoracic sternite.

incisor
Animals; Crustaceans

Cutting process of the mandible, usually dentate, sometimes modified for piercing.

areolation
Animals; Crustaceans

Demarcated and usually elevated regions of the brachyuran carapace.

obliquely erect
Animals; Crustaceans

Directed obliquely, more or less at 45 degrees to basal surface.

distal fold
Animals; Crustaceans

Distal pleat in the dorsolateral lobule of the petasma.

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