CRINOIDS |
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Ordovician |
Silurian |
Devonian |
Mississippian |
Pennsylvanian |
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Permian |
Triassic |
Jurassic |
Cretaceous |
Oligocene |
OTHER FOSSILS |
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Other Echinoderms |
Cambrian Life |
Arthropods |
Other Invertebrates |
Vertebrates |
Miscellaneous |
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| Key for Open Nomenclature | |
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| indet. | Indeterminate/unidentified, or a potential new/undescribed taxon |
| sp. | Same as indet. but at the species level |
| cf. | Likely the same taxon, but insufficient information/confidence to determine conclusively |
| aff. | Likely a similar but distinct taxon; shows similarities as well as key differences |
| n. sp. | New/undescribed species |
| n. gen. | New/undescribed genus |
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