Suborder:
|
Goniatitina
|
Superfamily:
|
Gastrioceratoidea
|
Family:
|
Reticuloceratidae
|
Subfamily:
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Reticuloceratinae
|
Genus:
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Phillipsoceras
|
Species:
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umbilicatum |
Qualifier:
|
ss |
Author:
|
Bisat & Hudson 1943,p.421
|
Lower Boundary:
|
GBY H2c--R1(prereticul.--Ho.magistrorum), 317 million years
|
Upper Boundary:
|
GBY R1a3--R1a4 (R.subretic.--todmorden.), 316.4 million years
|