Edestus
ver. 1.0
Back & Forth
| Superfamily | Edestoidea Hay, 1930 |
| Family | Edestidae Jaekel, 1899 |
| Genus | Edestus Leidy, 1855 |
| Pennsylvanian, Base of the Anna Shale Formation at the Contact with the underlying Herrin #6 Coal Seam of the Carbondale Group (Mazon Creek Fauna) Baldwin Mine, Sparta, Illinois USA |

Helicoprion sp.
| Superfamily | Edestoidea Hay, 1930 |
| Family | Agassizodontidae Zangerl, 1981, |
| Genus | Helicoprion Karpinsy, 1899 |
|
Permian, Phosphate Mine, Idaho, U.S.A. |

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