Dinopedia
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In the geologic timescale, the Callovian is an age or stage in the Middle Jurassic, lasting between 166.1 ± 4.0Ma (million years ago) and 163.5 ± 4.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the Oxfordian.[1]

Omeisaurus

An example of a Callovian dinosaur Omeisaurus.

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