Suborder:
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Goniatitina
|
Superfamily:
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Gastrioceratoidea
|
Family:
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Reticuloceratidae
|
Subfamily:
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Reticuloceratinae
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Genus:
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Reticuloceras
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Subgenus:
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Swintoceras
|
Species:
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spiraloides++ |
Qualifier:
|
ss |
Author:
|
Bisat & Hudson 1943,p.407
|
Lower Boundary:
|
GBY R1a--R1b (R.dubium--R.eoreticulatum), 316 million years
|
Upper Boundary:
|
GBY R1b--R1c (Ph.nodosum--R.reticulatum), 315.4 million years
|