Pentacrinites — Pentacrinites
Pentacrinites NobuTamura email:nobu.tamura@yahoo.com www.palaeocritti.com, Wikimedia Commons, CC BY SA 3.0

Crinoid

Pentacrinites

Star-stemmed crinoid

Pentacrinites is the Jurassic crinoid with pentagonal, star-shaped stem columnals that litter the beaches of Lyme Regis and Charmouth and appear pyritised at Holzmaden. Complete crowns with arms are rare; the loose 'star stones' are cheap beach finds. Pyritised Dorset Pentacrinites decay in damp air.

PhylumEchinodermata
ClassCrinoidea
OrderIsocrinida
FamilyPentacrinitidae
GroupCrinoid
Rank (PBDB)genus· Paleobiology Database
AuthorBlumenbach 1804· Paleobiology Database
Classification (PBDB)Echinodermata › Crinoidea › Isocrinida › Pentacrinitidae· Paleobiology Database
Range (PBDB)247–33.9 Ma· Paleobiology Database
PBDB occurrences152· Paleobiology Database

Elsewhere

Cite this article

Stratum Strata. "Pentacrinites" (Taxon). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/taxa/pentacrinites. Accessed 2026-09-21.

@misc{stratum-pentacrinites,
  title        = {Pentacrinites},
  author       = {{Stratum Strata}},
  howpublished = {\url{https://stratum.black/strata/taxa/pentacrinites}},
  year         = {2026},
  note         = {Taxon article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, pbdb, wikidata, commons, nhm. Accessed 2026-09-21.}
}

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