Type
Zone
Age range
449.7–449 Ma

International Timescale

Late Ordovician
Katian

Conodont Zonation

Aphelognathus grandis
Oulodus robustus
Oulodus velicuspis
449.7449.6449.6449.6449.5449.4449.4449.4449.3449.3449.2449.1449.1449.1449.0

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