Uintacrinus

Uintacrinus ("crinoid from the Uinta Mountains") is an extinct genus of crinoids from the Cretaceous of Kansas. It was unusual among crinoids because it had no stalk, and probably floated above the seafloor.^[1] It lived in the Western Interior Seaway. This crinoid was a colonial animal with ten long arms each that it used to capture prey.^[2]

Block at the AMNH preserving at least 65 U. socialis individuals. Collected in Kansas.

Uintacrinus Temporal range: Cretaceous
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Subphylum:	Crinozoa
Class:	Crinoidea
Order:	Uintacrinida
Genus:	Uintacrinus
Species
U. socialis