Genus: Diamantinasaurus HOCKNULL, WHITE, TISCHLER, COOK, CALLEJA, SLOAN & ELLIOTT, 2009
Etymology: In reference ot the Diamantina River, which runs near the type locality, western Central Queensland State, Australia and Greek, sauros, "lizard."

Species: matildae HOCKNULL, WHITE, TISCHLER, COOK, CALLEJA, SLOAN & ELLIOTT, 2009
Etymology: For Matilda, in reference to "Walzing Matilida", and one of Australia's National songs, written by Banjo Patterson in Winto ("Matilda County") in 1895.

Referred material:

POROPAT, TOSOLINI, BEESTON, , ENCHELMAIER, PENTLAND, MANNION, UPCHURCH, CHIN, KORASIDIS, BELL, ENRIQUEZ, HOLMAN, BROSNAN, ELSON, TRIPP, SCARLETT, GODEL, MADDEN, RICKARD, BEVITT, TISCHLER, CROZFORD, SLOAN, ELLIOT & GRICE, 2025

Locality: AODL 0246, 'Son of the Devil Site', Belmont Station, approximately 60 km northeast of Winton, western Central Queensland State, Australia.

Horizon: Winton Formation.

Biostratigraphy:

Age: Latest Albian Stage, Middle Gallic Subepoch, Early Cretaceous Epoch, Early Cretaceous.

Material:

AODF 0888 ("Judy"): Partial dentary, 6 teeth, cervicals vertebrae III-XV, dorsal vertebrae I-XI, doral ribs, sacrum comprising 5 coalescend sacral vertebrae, both scapulae, both coracoids, both sternal plates, left humerus, right ulna, left metacarpal II, manual phalanx, both ilia, left pubis, left femur, left tibia, left fibula, left astragalus, and additonal fragments.

Note: With skin impressions and gut contents.