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Seirocrinus subangularis — Seirocrinus subangularis
Seirocrinus subangularis — Ghedoghedo, Wikimedia Commons, CC BY SA 3.0

Crinoid

Seirocrinus subangularis

Colonial crinoid

Seirocrinus subangularis is the giant pseudoplanktonic crinoid of the Holzmaden Posidonia Shale, whose colonies with stems up to 20 m hung from driftwood logs and sank together. The Hauff Museum's colony is the largest fossil slab in the world; commercial slabs range from single crowns to multi-metre wall pieces. Slabs are backed, edged and consolidated, and the stems frequently have gaps filled; ask what percentage is original.

PhylumEchinodermata
ClassCrinoidea
OrderIsocrinida
FamilyPentacrinitidae
GroupCrinoid
Rank (PBDB)genus· Paleobiology Database
AuthorGislen 1924· Paleobiology Database
Classification (PBDB)Echinodermata › Crinoidea › Isocrinida › Pentacrinitidae· Paleobiology Database
Range (PBDB)201–183 Ma· Paleobiology Database
PBDB occurrences12· Paleobiology Database

Photographs

Seirocrinus subangularis — Seirocrinus subangularis Miller, 1821 (NHMUK PI E 25387)
Seirocrinus subangularis Miller, 1821 (NHMUK PI E 25387) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0
Seirocrinus subangularis — Seirocrinus subangularis Miller, 1821 (NHMUK PI E 25388)
Seirocrinus subangularis Miller, 1821 (NHMUK PI E 25388) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0

Age

Formations

Elsewhere

Cite this article

Stratum Study. "Seirocrinus subangularis" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/seirocrinus-subangularis. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-seirocrinus-subangularis,
  title        = {Seirocrinus subangularis},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/seirocrinus-subangularis}},
  year         = {2026},
  note         = {Taxon article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb, wikidata, commons, nhm. Accessed 2026-09-20.}
}

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