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Streptognathodus isolatus
669
Type
Zone
Age range
298.9–298
Ma
International Timescale
Cisuralian
Asselian
Pennsylvanian
Gzhelian
Conodont Zonation
Streptognathodus sigmoidalis-Streptognathodus cristellaris
Streptognathodus isolatus
Streptognathodus wabaunsensis
298.9
298.9
298.8
298.8
298.7
298.6
298.6
298.6
298.5
298.4
298.4
298.4
298.3
298.3
298.2
298.1
298.1
298.1
298.0
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