Sigilmassasaurus

Sigilmassasaurus ( ; "Sijilmassa lizard") is a controversial genus of spinosauriddinosaur that lived approximately 100 to 94 million years ago during the Late CretaceousPeriod in what is now northern Africa. Named in 1996 by Canadian paleontologistDale Russell, it contains a single species, Sigilmassasaurus brevicollis. The identity of the genus has been debated by scientists, with some considering its fossils to represent material from the closely related species Spinosaurus aegyptiacus, while others have classified it as a separate taxon, forming the clade Spinosaurini with Spinosaurus as its sister taxon.

Sigilmassasaurus was a moderately-built, ground-dwelling, bipedalcarnivore, like most other theropods. It may have had strong neck musculature as evidenced by the morphology of its vertebrae (backbones). Sigilmassasaurus may have had semiaquatic habits and a partially piscivorous diet. It coexisted with other large theropods in the Kem Kem Group.