External links
- Reteocrinus in the Paleobiology Database
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| Reteocrinus Temporal range: Middle Ordovician - Late Ordovician | |
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| Genus: | Reteocrinus |
Reteocrinus is an extinct genus of sea lily that lived in the Middle to Late Ordovician. Its remains have been found in North America.
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The Camerata or camerate crinoids are an extinct subclass of Paleozoic stalked crinoids. They were some of the earliest crinoids to originate during the Early Ordovician, reached their maximum diversity during the Mississippian, and became extinct during the Permian–Triassic extinction event. Camerates are the sister group of Pentacrinoidea, which contains all other crinoids. The two largest camerate subgroups are the orders Diplobathrida and Monobathrida.
The Verulam Formation is a geologic formation and Lagerstätte in Ontario, Canada. It preserves fossils dating back to the Katian stage of the Ordovician period, or Shermanian to Chatfieldian in the regional stratigraphy.