Monobathrida

Monobathrida
Cactocrinus imperator
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	Crinozoa
Class:	Crinoidea
Subclass:	†Camerata
Order:	†Monobathrida Moore and Laudon 1943
superfamilies
Platycrinacea

Platycrinacea

Monobathrida is an extinct order of crinoids.

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Wikipedia