Ardeosaurus is an extinct genus of basal lizards, known from fossils found in the Late Jurassic Solnhofen Plattenkalk of Bavaria, southern Germany.

[1] Ardeosaurus was originally considered to be a distant relative to modern geckos, and had a similar physical appearance.

Evans and colleagues, however, showed it in 2005 to be a basal squamate outside the crown group of all living lizards and snakes.

[2] A subsequent study conducted by Simões and colleagues in 2017 corroborated its initial proposed phylogenetic placement, indicating that Ardeosaurus was a stem-gekkotan.

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