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Crinozoa is a subphylum of mostly sessile , of which the , or sea lilies and feather stars, are the only extant taxon members. Crinozoans have an extremely extensive fossil history.
One proposal for the cladistic placement of the Homalozoa classes groups Stylophora together with crinoids to form Crinozoa. A 2024 survey of recent research finds more support for Homalozoa as a paraphyletic assemblage along the echinoderm stem group, but noted that the position of Stylophora in particular was uncertain.
If neither Paracrinoidea nor Stylophora can be included, Crinozoa would be equivalent to the Crinoidea total group.
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