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.
| Phylum | Echinodermata |
|---|---|
| Class | Crinoidea |
| Order | Isocrinida |
| Family | Pentacrinitidae |
| Group | Crinoid |
| Rank (PBDB) | genus· Paleobiology Database |
| Author | Blumenbach 1804· Paleobiology Database |
| Classification (PBDB) | Echinodermata › Crinoidea › Isocrinida › Pentacrinitidae· Paleobiology Database |
| Range (PBDB) | 247–33.9 Ma· Paleobiology Database |
| PBDB occurrences | 152· Paleobiology Database |
Photographs
Elsewhere
- WoRMS AphiaID: 412730
- GBIF: 4873858
- PBDB: 32515
- Wikidata: Q3899226
- PBDB taxon page
- Wikipedia: Pentacrinites
- PBDB search: Pentacrinites
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.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.