Trilobite
Eldredgeops rana
Phacops rana
Eldredgeops rana, long known as Phacops rana, is the Middle Devonian trilobite of Ohio, New York and Pennsylvania and Pennsylvania's state fossil, with a granular glabella and large compound eyes. Enrolled specimens from the Silica Formation and Penn Dixie are the classic American trilobite. Prone specimens from the shale are often flattened; three-dimensional ones from concretions are worth more.
| Phylum | Arthropoda |
|---|---|
| Class | Trilobita |
| Order | Phacopida |
| Family | Phacopidae |
| Group | Trilobite |
| Rank (PBDB) | species· Paleobiology Database |
| Author | (Green 1832)· Paleobiology Database |
| Classification (PBDB) | Arthropoda › Trilobita › Phacopida › Phacopidae· Paleobiology Database |
| Range (PBDB) | 420–379 Ma· Paleobiology Database |
| PBDB occurrences | 242· Paleobiology Database |
Photographs
Elsewhere
- GBIF: 4633031
- PBDB: 190459
- Wikidata: Q7179955
- PBDB taxon page
- Wikipedia: Phacops rana
- PBDB search: Eldredgeops
Cite this article
Stratum Strata. "Eldredgeops rana" (Taxon). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/taxa/eldredgeops-rana. Accessed 2026-09-21.
@misc{stratum-eldredgeops-rana,
title = {Eldredgeops rana},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/taxa/eldredgeops-rana}},
year = {2026},
note = {Taxon article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, pbdb, wikidata, commons, smithsonian. 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.