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.

Holotype: AODF 0603 'Matilda'

Locality: AODL 85, 'Matilda Site', Elderslie Station, approximately 60 km north-west of Winton, western Central Queensland State, Australia.

Horizon: Winton Formation.

Biostratigraphy:

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

Material: Dentary fragment, tooth 3 partial cervical ribs, 3 incomplete dorsal vertebrae, dorsal ribs, fragmentary gastralia, 5 coalesced sacral vertebrae, isoalted sacral porcess, left and right scapulae, coracoid right and left humeri, right ulna, near complete right metacarpus including metacarpals II-V, phalanges and manus ungual, left metacarpal I, left sternal plate, left ilium and isolated sacral processes, right and left pubes and ischia, right femur, tibia, fibula and astragalus.

Referred material:

POROPAT, MANNION, UPCHURCH, HOCKNULL, KEAR, KUNDRAT, TISCHLER, SLOAN, SINAPIUS, ELLIOTT, & ELLIOTT, 2016

Locality: AODL 127, 'Elliot Site', Belmont Station, Winton, western Central Queensland State, Australia.

Horizon: Winton Formation.

Biostratigraphy:

Age: Cenomanian-early Turonian Stage, Middle Gallic Subepoch, Lower Gulf Epoch, Middle Cretaceous.

Material:

AODF 0836 (Alex): Left squamosal, tooth (AODF 2298), left frontal, left and right parietals, left squamosal, left and right quadrates, nearly complete braincase (comprising supraoccipital, left adn right exoccipital-opisthotics, basioccipital, partial basisphenoid, left and right prootics, left adn right laterosphenoids, left and right orbitosphenoids, and left and right possible sphenethmoids), left surangular, skull fragments, atlas-axis, III-VI cervical veretbrae, mid/posterior cervical vertebral neural arch, 3 dorsal vertebrae,dorsal ribs, right scapula, partial sacrum, left and right iliac preacetabular processes, paired pubes and ischia, assocaited fragments, many representing ribs and partial vertebrae.

RIGBY, POROPAT, MANNION, PENTLAND, SLOAN, RUMBOLD, WEBSTER & ELLIOTT, 2022

Locality: AODL -122, 'Oliver Site', Elderslie Station, 60 km west-northwest of Winton, western Central Queensland State, Australia.

Horizon: Winton Formation.

Biostratigraphy:

Age: Cenomanian-early Turonian Stage, Middle Gallic Subepoch, Lower Gulf Epoch, Middle Cretaceous.

Material:

AODF 0663 (Oliver): 1 cervical rib, 2 dorsal vertebral centra, 3 dorsal neural arches, several dorsal ribs, left scapula, right humerus, right manual phalanx I-2, right femur and associated fragments.

BEESTON, POROPAT, MANNION, PENTLAND, ENCHELMAIR, SLOAN& ELLIOTT, 2024

Locality: AODL 0252 'Ann site', Elderslie Station, , Elderslie Station, 60 km west-northwest of Winton, western Central Queensland State, Australia.

Horizon: Winton Formation.

Biostratigraphy:

Age: Cenomanian-early Turonian Stage, Middle Gallic Subepoch, Lower Gulf Epoch, Middle Cretaceous.

Material:

ADOF 0906: Partial skull comparising left premaxilla, left maxilla, left lacrimal, left frontal, left parietal, left and right postorbitials, left and right squamosals, left and right quadratojugals, left and right quadrates, left and right pterygoids, left ectopterygoid, braincase (comprising supraoccipital, partial eft and right exoccipital-opisthotics, fragmentary basioccipital, left and righ tprootics, left and right laterosphenoids, left and right orbitosphenoids, and a possible right sphenethmoid), left and right dentaries, left suranglar, ?left ceratobranchial, 4 dorsal ribs, 5 sacral centra, several sacral porcesses, 2 anterior caudal vertebra, 1 chevron, left ilium, left pubis, right and left ischia, left and right femora, left and right tibiae, left and right fibulae, a probable right astragalus fragmetn, right metatarsals I-V, right pedal phalanges III =-1-3 and IV-1-2, adn associated fragments.