Definitions
Vertex
- The anterior and medial margin of the cephalic dorsal surface. [Wilson, 1989]
- Top part of head (cephalon). [Moore and McCormick, 1969]
- (Taxon-specific: Order Cladocera) Region of head between rostrum and compound eye (i.e., morphologically, part anterior to compound eye). [Stachowitsch, 1992]
- (Taxon-specific: Order Cladocera) Top part of head or cephalon. [McLaughlin, 1980]