Table 3 Stratigraphic occurrences of pirasocrinid genera
Genera | Miss. | Pennsylvanian | Permian | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Visean | Serpukhovian | Morrowan | Atokan | Desmoinesian | Missourian | Virgilian | Asselian | Sakmarian | Artinskian | |
Hypermorphocrinus | X | |||||||||
Separocrinus | X | X | ||||||||
Simocrinus | X | |||||||||
Perimestocrinus | X | X | X | |||||||
Aatocrinus | X | X | X | |||||||
Triceracrinus | X | X | X | X | ||||||
Retusocrinus | X | X | X | |||||||
Vertigocrinus | X | X | X | |||||||
Polygonocrinus | X | X | ||||||||
Metaperimestocrinus | X | X | ||||||||
Eirmocrinus | X | |||||||||
Pirasocrinus | X | |||||||||
Psilocrinus | X | |||||||||
Schedexocrinus | X | |||||||||
Metaffinocrinus | X | X | ? | ? | ||||||
Platyfundocrinus | X | |||||||||
Stenopecrinus | X | X | X | X | X | |||||
Affinocrinus | X | X | ||||||||
Exterocrinus | X | |||||||||
Lasanocrinus | X | |||||||||
Metutharocrinus | X | |||||||||
Utharocrinus | X | |||||||||
Zeusocrinus | X | |||||||||
Dasiocrinus | X | |||||||||
Plaxocrinus | X | X | X | X | X | X | X | |||