Dale Russell
Sigilmassasaurus ( ; "Sijilmassa lizard") is a genus of spinosaurid dinosaur that lived approximately 100 to 94 million years ago during the middle of the Cretaceous Period in what is now northern Africa. Named in 1996 by Canadian paleontologist Dale 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.