| Suborder: |
Anarcestina
|
| Superfamily: |
Beloceratoidea
|
| Family: |
Gephuroceratidae
|
| Subfamily: |
Gephuroceratinae
|
| Genus: |
Trimanticoceras
|
| Species: | retrorsum |
| Qualifier: | ss |
| Author: |
Buch 1832,p.181
|
| Lower Boundary: |
DER do one beta--do one gamma, 377.5 million years
|
| Upper Boundary: |
UD1K--UD1L:varicos.--C.holzapfeli [05,35, 375.1 million years
|
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