Diamantinasaurus

Diamantinasaurus Temporal range: Late Cretaceous, 93.9 Ma PreЄ Є O S D C P T J K Pg N ↓
Holotype skeleton in (a) right and (b) left views
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Dinosauria
Order:	Saurischia
Suborder:	†Sauropodomorpha
Clade:	†Neosauropoda
Clade:	†Macronaria
Clade:	†Titanosauria
Family:	†Antarctosauridae
Genus:	†Diamantinasaurus Hocknull et al., 2009
Species:	†D. matildae
Binomial name
Diamantinasaurus matildae Hocknull et al., 2009

Diamantinasaurus is a extinct genus of lithostrotian titanosaurian sauropod from Australia that lived during the early Late Cretaceous, about 94 million years ago. The type species of the genus is D. matildae, first described and named in 2009 by Scott Hocknull and colleagues. Meaning "Diamantina reptile", the name is derived from the location of the nearby Diamantina River and the Greek word sauros, "reptile". The specific epithet is from the Australian song Waltzing Matilda, also the locality of the holotype and paratype. The known skeleton includes most of the forelimb, shoulder girdle, pelvis, hindlimb and ribs of the holotype, and one shoulder bone, a radius and some vertebrae of the paratype.

The holotype of Diamantinasaurus was first uncovered over four seasons of excavations near Winton, Queensland, Australia. The bones, found alongside the holotype of Australovenator and crocodylomorphs and molluscs. The two dinosaurs found, known from specimens catalogued as AODF 603 and 604 were described in 2009 by Scott Hocknull and his colleagues. Specimen AODF 603 became the basis for the genus Diamantinasaurus, and the species D. matildae. The species name is a reference to the song "Waltzing Matilda", written by Banjo Paterson in Winton, while the generic name is derived from the Diamantina River, running nearby the type locality combined with the Greek sauros, meaning "lizard". AODF 603, the holotype, includes the right scapula, both humeri, right ulna, both incomplete hands, dorsal ribs and gastralia, partial pelvis, and the right hindlimb missing the foot. The paratype, under the same specimen, includes dorsal and sacral vertebrae, the right sternal plate now thought to represent the remainder of a coracoid, a radius, and one manual phalanx. All these bones come from AODL 85, nicknamed the "Matilda Site" at Elderslie Sheep Station, located about 60 km (37 mi) west-northwest from Winton in central Queensland. This locality is in the upper midsection of the Winton Formation, which dates to the Cenomanian of the Late Cretaceous.