histial

adj

1. Pertaining to the hinge area of the carapace of an ostracod.

   “In stratigraphically later genera with histial dimorphism frequently no histial structure and also no velar structure at all is present in the tecnomorphs.”

   “The histial ridge of the heteromorphs is comparatively wide, especially in the anteroventral part, and forms a wide, open cavity —the histial dolon.”

   “In both cases the histial dolon is united anteriorly with the velar dolon and both genera are also similar in being unisulcate .”