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112 and 94 Ma ago. However, an even greater age has been suggested for one of the Algerian sites, which may be as old as the Aptian, 125 to 112 Ma ago. Caldwell et al. 2015 described three genera of stem-snakes from Jurassic and considered that Parviraptor as stem-snake as well. However, later review considers that affinity of those fossils as stem-snakes are doubtful, which makes the earliest unequivocal records date around Aptian-Cenomanian.

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