| Suborder: |
Goniatitina
|
| Superfamily: |
Gastrioceratoidea
|
| Family: |
Glaphyritidae
|
| Subfamily: |
Glaphyritinae
|
| Genus: |
Syngastrioceras
|
| Species: | walkeri |
| Qualifier: | ss |
| Author: |
Webster & Lane 1967,p.519
|
| Lower Boundary: |
RUS Nm1c1--Nm1c2(uralicus--Del.bressoni), 322 million years
|
| Upper Boundary: |
UAR Upper Pitkin--Imo Formation, 321 million years
|
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