Definitions

Internal hard parts of some decapods consisting mainly of endophragms. [Moore and McCormick, 1969]
(Taxon-specific: Order Anostraca) Term occasionally applied to various more rigid internal structures serving as sites of muscle attachment. [Stachowitsch, 1992]
(Taxon-specific: Order Decapoda) Internal skeletal structure of head and thorax (cephalothorax). When fully developed, consists of complex system of fused projections (endopleurites, endosternites).
(syn. endophrogmal skeleton, endophragmal system)
See: Exoskeleton [Stachowitsch, 1992]
(Taxon-specific: Subclass Copepoda) In head, weakly developed internal skeleton consisting of two endosternites. [Stachowitsch, 1992]
(Taxon-specific: Class Ostracoda) Thin internal skeleton of body; forms complex framework supporting limbs and caudal rami. [Stachowitsch, 1992]