Trilobite
Ceraurus
Ordovician cheirurid
Ceraurus is the Ordovician cheirurid with long genal spines and a pair of stout pygidial spines, found in the Trenton Group of New York and Ontario and the Bobcaygeon Formation. Complete Ceraurus pleurexanthemus from Ontario quarries are prized North American trilobites; most trade specimens are old quarry stock or from private-land field trips.
| Phylum | Arthropoda |
|---|---|
| Class | Trilobita |
| Order | Phacopida |
| Family | Cheiruridae |
| Group | Trilobite |
| Rank (PBDB) | genus· Paleobiology Database |
| Author | Green 1832· Paleobiology Database |
| Classification (PBDB) | Arthropoda › Trilobita › Phacopida › Cheiruridae· Paleobiology Database |
| Range (PBDB) | 471–443 Ma· Paleobiology Database |
| PBDB occurrences | 184· Paleobiology Database |
Elsewhere
- GBIF: 4633116
- PBDB: 21491
- Wikidata: Q5063882
- PBDB taxon page
- Wikipedia: Ceraurus
- PBDB search: Ceraurus
Cite this article
Stratum Strata. "Ceraurus" (Taxon). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/taxa/ceraurus. Accessed 2026-09-21.
@misc{stratum-ceraurus,
title = {Ceraurus},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/taxa/ceraurus}},
year = {2026},
note = {Taxon article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, pbdb, wikidata, commons. 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.