Delocrinus

Delocrinus
Temporal range: Carboniferous–Permian
Scientific classification
Kingdom:Animalia
Phylum:Echinodermata
Class:Crinoidea
Order:†Dendrocrinida
Family:†Catacrinidae
Genus:†Delocrinus
Miller and Gurley 1890
Species
  • Delocrinus admirensis
  • Delocrinus densus
  • Delocrinus missouriensis
  • Delocrinus titicara
  • Delocrinus vastus
  • Delocrinus verbeeki
  • Delocrinus vulgatus

Delocrinus is a genus of extinct crinoids, belonging to the family Catacrinidae.[1] Specimens have been found in Kansas Nebraska Nevada Oklahoma, Arizona, Iowa, Texas, Utah and Virginia.

Delocrinus missouriensis was made the state fossil of Missouri in 1989.

Description

Like extant crinoids, Delocrinus species was anchored to a hard surface by a holdfast out of which grew an articulated stalk. On top of this was a calyx with a number of feather-like arms. Each arm bore short branches known as pinnules and from these cirri were extended which sifted plankton from the water flowing past.[2]

References

  1. ↑ "Delocrinus". Palaeobiology Database.
  2. ↑ Dorit, R. L.; Walker, W. F.; Barnes, R. D. (1991). Zoology. Saunders College Publishing. pp. 790–792. ISBN 978-0-03-030504-7.
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