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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
postocular sulcus
Animals; Crustaceans
A small groove situated near the dorsal extremity of the orbital margin.
accessory flexor muscle
Animals; Crustaceans
A small muscle which flexes the leg at the MC joint. It is in two parts, proximal and distal, and inserts on a long thin apodeme in the merus.
secondary bud
Animals; Crustaceans
A small, poorly differentiated limb which has been reconfigured from a limb bud or a transformed limb of a copepodid; a seconday bud usually is found on a chalimus (see bud and transformed limb).
preorbital spine
Animals; Crustaceans
A spine on the anterior part of the supraorbital eave in the Majidae.
intercalary spine
Animals; Crustaceans
A spine on the dorsal margin of the orbit lying between the postorbital spine and the supraorbital eave (Majidae).
stadia
Animals; Crustaceans
A stage in the life history of an organism; interval between successive molts.
sperm plug
Animals; Crustaceans
A structure plugging the opercula and distal part of each genital duct of female crabs to prevent loss of sperm after copulation.
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