Type
Zone
Age range
387.95–387.5 Ma

International Timescale

Middle Devonian
Givetian
Eifelian

Conodont Zonation

Polygnathus varcus
Polygnathus hemiansatus
Polygnathus ensensis
387.96387.94387.92387.90387.88387.86387.84387.82387.80387.78387.76387.74387.72387.70387.68387.66387.64387.62387.60387.58387.56387.54387.52387.50387.48

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