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Streptognathodus cancellosus
661
Type
Zone
Age range
305.2–304.5
Ma
International Timescale
Pennsylvanian
Kasimovian
Conodont Zonation
Idiognathodus toretzianus
Streptognathodus cancellosus
Idiognathodus sagittalis
305.2
305.1
305.1
305.1
305.0
304.9
304.9
304.9
304.8
304.8
304.7
304.6
304.6
304.6
304.5
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