What is "ardeosaurus"

Ardeosaurus is an extinct genus of basal lizards, known from fossils found in the Late Jurassic Solnhofen Plattenkalk of Bavaria, southern Germany. Ardeosaurus was originally considered to be a distant relative to modern geckos, and had a similar physical appearance, though more modern phylogenetic analysis has shown it to be a basal squamate outside the crown group of all living lizards and snakes. It was around long, with a flattened head and large eyes. It was probably nocturnal, and had jaws specialised for feeding on insects and spiders.