| Dawsonoceratidae | |
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| Dawsonoceras hyatti | |
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| Family: | Dawsonoceratidae Flower (1946)
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Dawsonoceratidae is an extinct family of orthoconic nautiloid cephalopods that lived in what would be North America and Europe from the Late Ordovician through the Middle Devonian from about 480–390 mya, existing for approximately 90 million years.[1]