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[fahy-tuh-sawr] /ˈfaɪ təˌsɔr/
any armored, semiaquatic reptile of the extinct order Phytosauria, of the Mesozoic Era, resembling the crocodile but unrelated, having the nostrils high on the snout and with well-developed hind limbs suggestive of bipedal ancestors.
< New Latin Phytosauria (see phyto-, -saur, -ia) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Encyclopedia Article for phytosaur

heavily armoured semiaquatic reptiles found as fossils from the Late Triassic Period (228 million to 200 million years ago). Phytosaurs were not dinosaurs; rather both groups were archosaurs, a larger grouping that also includes crocodiles and pterosaurs (flying reptiles).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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