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Superfamily Cidaridea Gray, 1825, p. 426

[= Cidaridea Kroh & Smith, 2010, p. 170.]

Diagnosis	Cidaroida with: secondary spines flattened and weakly to strongly adpressed; rather dense, uniform granulation covers interambulacral plates beyond the primary tubercles; primary tubercles smooth or with only a trace of crenulation.
Range	?Late Triassic, Jurassic to Recent.
Type	Cidaris Linnaeus, 1758
Species Included	Includes the families Psychocidaridae Ikeda, 1936, Cidaridae Gray, 1825, and Ctenocidaridae Mortensen, 1928
Classification and/or Status	Cidaroida
Remarks	Raised to superfamily level by Kroh & Smith (2010). Gray, J. E. 1825. An Attempt to divide the Echinida, or Sea Eggs, into Natural Families. Annals of Philosophy, new series 10: 423-431. Kroh, A. & Smith, A. B. 2010. The phylogeny and classification of post-Palaeozoic echinoids. Journal of Systematic Palaeontology 8, 147-212.