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Re: Quantasaurus

It's spelled "Qantassaurus", after Australia's airline QANTAS - back when it was just a domestic carrier QANTAS was an acronym of "Queensland and Northern Territory Airline Service".


This is a small ornithopod from the Early Cretaceous of southeastern Australia. Based on the available material - lower jaws and teeth - Qantassaurus seems to have had a shorter face compared to Atlascopcosaurus, although the cheek-teeth of the two genera were identical.

Rich and Rich (1999) recognise three taxa of hypsilophodontids from Victoria based on cranial remains (jaws and teeth): Leaellynasaura, Atlascopcosaurus, and Qantassaurus. The teeth of Leaellynasaura are distinctive from the other two, but the cheek-teeth of Atlascopcosaurus and Qantassaurus are indistinguishable. In both, the cheek-teeth possess a strong primary ridge with eight secondary ridges that cover the buccal and lingual aspects of the maxillary and dentary teeth, respectively.

Their teeth may be impossible to tell apart, but the dentaries of Atlascopcosaurus and Qantassaurus are quite different. The dentary of Qantassaurus is extremely "foreshortened", in contrast to the comparatively elongated dentary of Atlascopcosaurus. With its truncated dentary, there is less space for the teeth, and Qantassaurus has no more than ten teeth per dentary. Also, whereas the top and bottom edges of Atlascopcosaurus' dentary are almost parallel, the dorsal and ventral margins of Qantassaurus' dentary converge at the anterior of this element, making this portion of the jaw rather wedge-shaped, a condition also seen in Hypsilophodon.


Qantassaurus intrepidus

Genus: Qantassaurus Rich and Rich, 1999
Species: Q. intrepidus Rich and Rich, 1999 (type)

NMV P199075 (holotype): Complete dentary with one tooth.
NMV P199087: Dentary fragment.
NMV P198962: Complete dentary with four teeth.
Above material referred to Q. intrepidus by Rich and Rich (1999).
Locality: Flat Rocks, marine platform of Bunarong Marine Park, Victoria, southeatern Australia.
Horizon: Wonthaggi Formation, Strzelecki Group; Early Cretaceous (early Aptian).

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