|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Fay R. O. 1961b. Blastoid studies. The University of Kansas Paleontology
Contributions No. 27, Echinodermata Article 3, 147 p.
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.