Suborder:
|
Goniatitina
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Superfamily:
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Schistoceratoidea
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Family:
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Welleritidae
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Subfamily:
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Welleritinae |
Qualifier:
|
fs |
Author:
|
Plummer & Scott 1937,p.375
|
Lower Boundary:
|
U Morrowan (Bloydian)--Atokan[MOR--ATO], 310.4 million years
|
Upper Boundary:
|
Moscovian--Kasimovian [MOS--KAS], 306.5 million years
|