| Suborder: |
Goniatitina
|
| Superfamily: |
Gastrioceratoidea
|
| Family: |
Glaphyritidae
|
| Subfamily: |
Glaphyritinae
|
| Genus: | Eosyngastrioceras |
| Qualifier: | ge |
| Author: |
Titus 2000, p. 38
|
| Lower Boundary: |
Visean--Namurian/Serpukhovian [VIS--NAM], 326.4 million years
|
| Upper Boundary: |
Arnsbergian--Chokierian [ARN--CHO], 319 million years
|
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