Temporal range: Late Cretaceous Coniacian
Yadagiri and Ayyasami, 1979
Dravidosaurus (meaning "Dravidanadu lizard", Dravidanadu being a region in the southern part of India where the remains were discovered) is an extinct genus of stegosaur dinosaur that lived in what is now India.
Dravidosaurus lived in the Late Cretaceous period (Coniacian stage) of what is now India. It is only known from disassociated remains comprising a partial skull, a tooth, a sacrum, an ilium, an ischium, a dermal plate, and a spike. The badly weathered remains were discovered in marine deposits near Ariyalur in the state of Tamil Nadu in South India. They were in 1979 named by P.M. Yadagiri and Krishnan Ayyasami as the type species Dravidosaurus blanfordi, the specific name honouring William Thomas Blanford. The holotype partial skull is catalogued as GSI SR Pal 1, while other specimens are catalogued GSI SR Pal 2-7.
In 1991, Sankar Chatterjee visited the site and claimed, without concrete morphological evidence, that Dravidosaurus is a plesiosaur, the species being a nomen dubium. However, this claim was rejected Galton and Upchurch (2004), who noted that the skull, tooth and plate of Dravidosaurus are certainly not plesiosaurian. Galton and Ayyasami (2017) reaffirmed the stegosaurian classification of Dravidosaurus by noting that stegosaurian remains from the Dravidosaurus type locality are under study by one of the original describers of Dravidosaurus. The tooth referred to Dravidosaurus appears to come from a notosuchian.
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