Stratum.black
Calymene — Calymene
Calymene — User:Captmondo, Wikimedia Commons, CC BY SA 3.0

Trilobite

Calymene

Calymenid trilobite

Calymene is the Silurian calymenid with a bell-shaped glabella and small eyes; C. niagarensis from the Waldron Shale and Rochester Shale, and C. blumenbachii, the 'Dudley Bug' of England, are the collector species. The Moroccan 'Calymene' sold cheaply by the thousand are Ordovician Flexicalymene from the Ktaoua beds and are often cast in resin; genuine ones show shell texture and a natural matrix break.

PhylumArthropoda
ClassTrilobita
OrderPhacopida
FamilyCalymenidae
GroupTrilobite
Rank (PBDB)genus· Paleobiology Database
AuthorBrongniart 1822· Paleobiology Database
Classification (PBDB)Arthropoda › Trilobita › Phacopida › Calymenidae· Paleobiology Database
Range (PBDB)486–393 Ma· Paleobiology Database
PBDB occurrences518· Paleobiology Database

Photographs

Calymene — Calymene blumenbachii Brongniart, 1817 (NHMUK PI In 55371)
Calymene blumenbachii Brongniart, 1817 (NHMUK PI In 55371) — © The Trustees of the Natural History Museum, London, Natural History Museum (London) Data Portal, CC BY 4.0
Calymene — Calymene blumenbachii Brongniart, 1817, FIGURED (NHMUK PI OR 58979)
Calymene blumenbachii Brongniart, 1817, FIGURED (NHMUK PI OR 58979) — © 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. "Calymene" (Taxon). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/taxa/calymene. Accessed 2026-09-20.

BibTeX · CSL-JSON

@misc{stratum-calymene,
  title        = {Calymene},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/taxa/calymene}},
  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.}
}

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.