Type
Zone
Age range
506.6–505.25 Ma

International Timescale

Miaolingian
Wuliuan
Series 2
Stage 4

Trilobite Zonation - Laurentia

Ptychagnostus gibbus
Ptychagnostus praecurrens
Albertella
506.6506.5506.4506.3506.2506.1506.0505.9505.8505.7505.6505.5505.4505.3505.2

Macrostrat

Data

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