Rebbachisaurus (meaning "Aït Rebbach lizard") is a genus of sauropod dinosaur of the superfamily Diplodocoidea, that lived during the Late Cretaceous period in Africa and possibly also South America about 99-97 million years ago.

[2] Between 8 October 1948 and 3 January 1952, Rene Lavocat collected the holotype of Rebbachisaurus garasbae (MNHN-MRS 1958), which consists of ten ribs, the right shoulder blade, eleven vertebrae, the sacrum, a humerus, and two bones probably belonging to the pelvis, in the Aoufous Formation at Gara Sbaa, Errachidia in Morocco.

He named the type species R. garasbae during the same year but only the shoulder blade and a single vertebra from the string of eleven were initially described, very briefly and without illustrations.

Another seven elasmobranchs are reported: Asteracanthus aegyptiacus, Distobatus nutiae, Tribodus sp., Lissodus sp., Haimirichia amonensis, Cretoxyrhinidae indet., and Marckgrafia lybica.

Turtles are represented by several species: Dirqadim schaefferi, the podocnemidids Hamadachelys escuilliei, the bothremydids Galianemys whitei and G. emringeri, and the araripemydids Araripemys sp.

Crocodilians are commonly found; four species are present: Elosuchus cherifiensis, a genus that belonged to the Trematochampsidae, Araripesuchus rattoides and Laganosuchus maghrebensis.