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Description
Reconstruction of the Llandovery-aged tolypelepidid heterostracan, Athenaegis chattertoni, of the Early Silurian Northwest Territories, near where the shores of Avalanche Lake is today.

Description
Reconstruction of the Llandovery-aged tolypelepidid heterostracan, Athenaegis chattertoni, of the Early Silurian Northwest Territories, near where the shores of Avalanche Lake is today.