|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Echinoidea - Spatangoida - Paleopneustidae
It was assigned to Echinoidea by Durham (1961); to Paleopneustidae by Henderson (1975); to Pericosmidae by Fischer (1966) and Ragaini (1994); and to Spatangoida by Sepkoski (2002).
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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.