|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was reranked as the order Flexibilia by Clark and Twitchell (1915); it was reranked as the superorder Flexibilia by Wright et al. (2017) and Mao et al. (2018).
It was assigned to Dicyclica by Clark and Twitchell (1915); to Crinoidea by Ausich (1998), Webster et al. (1999), Webster et al. (2009) and Ausich and Copper (2010); to Cladida by Wright et al. (2017); and to Cladida by 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.