Crustaceans

Crustaceans

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

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alice1

Beijing, China

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Crustaceans

postcervical notch

Animals; Crustaceans

# Strong indentation of carapace at level of postcervical groove (e.g., scyllarid palinurans). # Strong indentation of carapace at level of postcervical groove.

incisur

Animals; Crustaceans

# Terminal process of mandible, cutting blade, often toothed (more properly, incisor process). # An anterior indentation (ranging from slight to deep and even slit-like) of the valves of the ...

metabranchial

Animals; Crustaceans

# That region of porcellanid (crab) carapace situated below linea anomurica and, therefore, not completely united with main part of carapace. # The region on the dorsal surface of the carapace ...

dorsum

Animals; Crustaceans

# The dorsal surface of a body segment. # In carapace, more or less flattened area to each side of hinge; delimited from lateral surface by angle in valve.

The first paired cephalic appendage. In munnopsids, it consists of a wide, flattened basal segment, two segments of intermediate thickness, and distal annular segments of varying lengths. The most ...

semi-open petasma

Animals; Crustaceans

The lateral lobes are flexable but folded, with the ventral costae distinctly turned ventromesially, delimiting relatively ample space extending from proximal to distal ends

closed petasma

Animals; Crustaceans

The lateral lobes are heavily sclerotized, sometimes making structure virtually rigid, with the ventral costae situated ventromesially, almost abutting, and delimiting a small, sometimes extremelyso, ...