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Streptognathodus subexcelsus
659
Type
Zone
Age range
307–305.7
Ma
International Timescale
Pennsylvanian
Kasimovian
Moscovian
Conodont Zonation
Idiognathodus sagittalis
Streptognathodus subexcelsus
Neoghanthodus round-Streptognathodus cancellosus
307.0
306.9
306.8
306.7
306.6
306.5
306.4
306.3
306.2
306.1
306.0
305.9
305.8
305.7
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