|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the subclass Inadunata by Wright et al. (2017) and Mao et al. (2018).
It was assigned to Crinoidea by Regnell (1948), Burke (1977), Parsley (1981), Donovan (1984) and Donovan (1986); and to Pentacrinoidea by Wright et al. (2017) and Mao et al. (2018).
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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.