carapace angles

carapace angles
In Leaiidae (Conchostraca), angle made by straight dorsal margin with anterior rib (a) and with posterior rib (b); these angles may have utility in tracing evolutionary development and in stratigraphic zonation [Moore and McCormick, 1969].
(Order Diplostraca):
Intersection of straight and dorsal margin by anterior rib (alpha) and posterior rib (beta) [McLaughlin, 1980].

Crustacea glossary. . 2011.

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