cephalic constriction
(Subclass Mystacocarida):
Constriction delimiting anterior antennulary part of head from posterior part [McLaughlin, 1980].
(Subclass Mystacocarida):
Transverse groove dividing head (cephalon) into anterior (antennulary) and posterior parts [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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