迪亞曼蒂納龍屬

迪亞曼蒂納龍 化石時期： 下白堊紀
保护状况
化石
科學分類
界： 動物界 Animalia 門： 脊索動物門 Chordata 綱： 爬行綱 Reptilia 超目： 恐龍總目 Dinosauria 目： 蜥臀目 Saurischia 亞目： 蜥腳亞目 Sauropodomorpha 下目： 蜥腳下目 Sauropoda （未分级） 泰坦巨龍類 Titanosauria 屬： 迪亞曼蒂納龍 Diamantinasaurus Hocknull et al., 2009
種
瑪蒂爾達氏迪亞曼蒂納龍 D. matildae Hocknull et al., 2009 (模式種)

迪亞曼蒂納龍（Diamantinasaurus）是在澳洲下白堊紀地層發現的一屬衍生泰坦巨龍類。牠們只有部份顱後遺骸。

描述及歷史

迪亞曼蒂納龍的完模標本是AODL 603，是一組部份骨骼，包括有右肩胛骨、胸板、大部份前肢、大部份後肢、部份盆骨及肋骨。Diamantinasaurus was unusual for a derived titanosaurian in retaining a thumb claw. The limb bones were stout. Diamantinasaurus was described in 2009 by Scott Hocknull and colleagues. The type species is D. matildae, in reference to the folk song "Waltzing Matilda", which was written by Banjo Paterson in nearby Winton. A phylogenetic analysis found Diamantinasaurus to be a lithostrotian titanosaurian sauropod, in the same clade as sauropods such as Opisthocoelicaudia and Saltasaurus. The discovery has been nicknamed "Matilda" after "Waltzing Matilda", and is described as a stocky herbivore about Template:Ft to m in length.

Many titanosaurids are known to have had small armor plates, however, it is not known whether Diamantinasaurus had them.

古生物學

AODL 603 was found about 60公里（37英里） northwest of Winton, near Elderslie Station. It was recovered from the lower part of the Winton Formation, dated to the latest Albian. AODL 603 was found in a clay layer between sandstone layers, interpreted as an oxbow lake deposit. Also found at the site were the type specimen of the theropod Australovenator, bivalves, fish, turtles, crocodilians, and plant fossils. The Winton Formation had a faunal assemblage including bivalves, gastropods, insects, the lungfish Metaceratodus, turtles, the crocodilian Isisfordia, pterosaurs, and several types of dinosaurs, such as the theropod Australovenator, the sauropod Wintonotitan, and unnamed ankylosaurians and hypsilophodonts. Diamantinasaurus bones can be distinguished from Wintonotitan bones because Diamantinasaurus bones are more robust. Plants known from the formation include ferns, ginkgoes, gymnosperms, and angiosperms. Like other sauropods, Diamantinasaurus would have been a large quadrupedal herbivore.