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