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Polygnathus costatus partitus
609
Type
Zone
Age range
393.47–391.5
Ma
International Timescale
Middle Devonian
Eifelian
Early Devonian
Emsian
Conodont Zonation
Polygnathus costatus costatus
Polygnathus costatus partitus
Polygnathus costatus patulus
393.5
393.4
393.3
393.2
393.1
393.0
392.9
392.8
392.7
392.6
392.5
392.4
392.3
392.2
392.1
392.0
391.9
391.8
391.7
391.6
391.5
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