ENTOMODONT HINGE
Ephippium
A portion of the shed carapace that functions as an egg case in some cladoceran taxa [Brusca and Brusca, 2002].
Semielliptical modification of cuticle in dorsal region of carapace valves forming encasement for eggs, capable of withstanding dessication after being shed (Cladocera). (Pl. ephippia) [McLaughlin, 1980].
Semielliptical part of dorsal region in each valve of cladoceran branchiopods altered to form encasement for eggs, shed as unit and constructed in manner that facilitates ultimate hatching after desiccation (especially characteristic of Daphniidae). (Pl. ephippia) [Moore and McCormick, 1969].
(Order Cladocera):
Egg case formed by walls of brood chamber. Typically separated from rest of carapace during molting. (knobby and with two eggs, reticulated and with single egg) [Stachowitsch, 1992].