|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Echinoidea - Echinothurioida
It was corrected as Echinothurioida by Durham and Melville (1957), Fell (1966), Sepkoski (2002), Kroh and Smith (2010) and Smith (2015).
It was assigned to Diadematacea by Fell (1966); to Echinoidea by Durham and Melville (1957) and Sepkoski (2002); and to Euechinoidea by Kroh and Smith (2010) and Smith (2015).
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.