page_title: Callovian
section_title: †Plesiosaurs
hierarchical_section_title: Callovian / Palaeontology / †Plesiosaurs
caption_attribution_description: Peloneustes philarchus, a pliosaur from the Upper Jurassic of Europe, 3 m
context_page_description: In the geologic timescale, the Callovian is an age and stage in the Middle Jurassic, lasting between 166.1 ± 4.0 Ma and 163.5 ± 4.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the Oxfordian.
caption: Peloneustes
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