"Ampelosaurus atacis" is known from a specimen from the Marnes Rouges Inférieures Formation. More specifically, it is known from the Bellevue layer, which has produced many vertebrate fossils. Even though it produced many vertebrates, the formation only has a few elements of plants and invertebrates. The vertebrates consist of numerous remains of "Ampelosaurus", scales of "Lepisosteus", shell fragments of an indeterminate turtle, cranial fragments and teeth of a crocodile, isolated theropod teeth, classified as Dromaeosauridae indet., an indeterminate ankylosaur, and a dentary and many postcranial elements of "Rhabdodon priscus". The bird "Gargantuavis philoinos", and dinosaur eggs have also been recovered.