[= Histocidarina Mortensen, 1928, p. 69]
Upper Triassic (Rhaetic) to Recent; widespread.
|Species Included||Only the genus Histocidaris is included.|
|Classification and/or Status||Cidaroida, Histocidaridea|
Distinguished from Rhabdocidaridae by its non-conjugate pore-pairs and from micodarids by its non-denticulate and more or less firmly tesselate ambulacral-interambulacral plate sutures. It differs from Cidaridae by its strongly crenulate tubercles and from Psychocidaridae by its small and clearly perforate mamelons and long cylindrical spines.