After Hess, Ausich, Brett & Simms, 1999 and Sumrall & Parsley, 2003
<==o †Edrioasteroidea Billings, 1858 |?-o †Carneyella | `-- †C. picta (Hall) |?-o †Edrioaster | `-- †E. bigsbyi |?- †Edriophus |?- †Hemicystites |?-o †Lepidodiscus | `-- †L. squamosus (Meek & Worthen) |?-o †Stalticodiscus | `-- †S. milleri |?-o †Timeischytes | `-- †T. casteri Bell, 1975 |== other edrioasteroids |?-o †Diploporidae | `-- †Aristocystites |--o †Isorophida Bell, 1976 | `--o †Isorophina Bell, 1976 | |--o †Agelacrinitidae Chapman, 1860 [incl. †Postibullinidae] | | |-- †Yukutidiscus Arendt, 1983 | | |--o †Neoisorophusella Kammer et al., 1987 | | | |-- †N. lanei Kammer et al., 1987 | | | |-- †N. berryi Kammer et al., 1987 | | | `-- †N. whitesidei Sumrall, Sprinkle & Bonem, 2006 | | |--o †Ulrichidiscus Bassler, 1935 | | | |-- †U. spinosus | | | `-- †U. forbesi Sumrall, Sprinkle & Bonem, 2006 | | |--o †Postibullinae Sumrall et al., 2000 | | | |--o †Postibulla Bell, 1976 | | | | `-- †P. westergaardi Sumrall, Sprinkle & Bonem, 2006 | | | `--o †Parapostibulla | | | `-- †P. graysoni Sumrall, Sprinkle & Bonem, 2006 | | `== other Agelacrinitids? | `--o †Isorophinidae | |--o †Isorophus | | `-- †I. cincinnatiensis (Roemer) | `-- †Isorophusella Bassler, 1935 `--o †Discocystinidae |--o †Clavidiscus | `-- †C. laudoni (Bassler) `--+--o †Hypsiclavus | |-- †H. kinsleyi Sumrall | |-- †H. huntsvillensis Sumrall | `-- †H. priesti (Strimple) `--+--o †Spiraclavus | `-- †S. nacoensis Sumrall, 1992 `--o †Giganticlavus Sumrall & Bowsher, 1996 `-- †G. bennisoni Sumrall & Bowsher, 1996
Reference(s):
- Hess, H., Ausich, W. I., Brett, C. E. & Simms, M. J., (eds.) 1999: Fossil Crinoids.
–Cambridge University Press, Cambridge, England, 1999, xv-275 - Sumrall, C. D. & Parsley, R. L., 2003: Morphology and biomechanical implications of isolated discocystinid plates (Edrioasteroidea, Echinodermata) from the Carboniferous of North America.
–Palaeontology: Vol. 46, #1, pp. 113-138 - Sumrall, C. D., Sprinkle, J. & Bonem, R. M., 2006: An edrioasteroid-dominated echinoderm assemblage from a Lower Pennsylvanian marine conglomerate in Oklahoma.
–Journal of Paleontology: Vol. 80, #2, pp. 229-244