|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Echinoidea - Echinoneoida - Echinoneidae
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|C. D. Wagner and J. W. Durham 1966||Circular to ovate, low-arched to hight subconial, flattened orally; apical system apparently tetrabasal; peristome sunken, subrounded to oblique; periproct large,pyriform,inframarginal; tubercles perforate, crenulate; no evidence of girdle or lantern in adult.|