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Crinoidea -

Flexibilia was named by Zittel (1895). It was considered monophyletic by Wright et al. (2017).

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).

Synonymy list
YearName and author
1895Flexibilia Zittel
1915Flexibilia Clark and Twitchell p. 39
1998Flexibilia Ausich p. 17
1999Flexibilia Webster et al. p. 475
2009Flexibilia Webster et al. p. 248
2010Flexibilia Ausich and Copper p. 54
2017Flexibilia Wright et al.
2018Flexibilia Mao et al. p. 1076

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subphylumCrinozoaMatsumoto 1929
classCrinoideaMiller 1821
subclassPentacrinoideaJaekel 1918
infraclassInadunata(Wachsmuth and Springer 1897)
Cladida(Moore and Laudon 1943)
superorderFlexibilia(Zittel 1895)
superorderFlexibilia(Zittel 1895)

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.

No diagnoses are available