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Gnathodus typicus-Siphonodella isosticha
635
Type
Zone
Age range
353–349
Ma
International Timescale
Mississippian
Tournaisian
Conodont Zonation
Dollimae bouckaerti
Gnathodus typicus-Siphonodella isosticha
Siphonodella quadruplicata-Patrognathus andersoni
353.0
352.8
352.6
352.4
352.2
352.0
351.8
351.6
351.4
351.2
351.0
350.8
350.6
350.4
350.2
350.0
349.8
349.6
349.4
349.2
349.0
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