Suborder:
|
Goniatitina
|
Superfamily:
|
Marathonitoidea
|
Family:
|
Hyattoceratidae
|
Genus:
|
Abichia |
Qualifier:
|
gy |
Author:
|
Gemmellaro 1887,p.18
|
Valid:
|
Hyattoceras Gemmellaro 1887,p.14 |
Lower Boundary:
|
Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
|
Upper Boundary:
|
RIT Amarassi beds top, 258 million years
|