| Suborder: |
Anarcestina
|
| Superfamily: |
Triainoceratoidea
|
| Family: |
Maenioceratidae
|
| Genus: |
Maenioceras
|
| Species: | excavatum |
| Qualifier: | sh |
| Author: |
Phillips 1841,p.121
|
| Valid: | Maenioceras molarium (Whidborne,1889) |
| Lower Boundary: |
MD2A--MD2B: undul.--molarium Z. [13,00], 390.6 million years
|
| Upper Boundary: |
mid.--up.varcus Zone [17,00], 389 million years
|
Loading