Suborder:
|
Goniatitina
|
Superfamily:
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Dimorphoceratoidea
|
Family:
|
Dimorphoceratidae
|
Subfamily:
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Glyphiolobinae
|
Genus:
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Metadimorphoceras
|
Species:
|
richardsi |
Qualifier:
|
ss |
Author:
|
Korn, D & Titus, A 2011, p. 156
|
Lower Boundary:
|
DER fimbriatus--spirifer/striatus, 330.7 million years
|
Upper Boundary:
|
DER Go beta falcatus--Go beta gracilis, 329.1 million years
|