DOI: 10.5061/dryad.rm8bk77
title: Data from: New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of the Australian-Antarctic rift system, with revision of Qantassaurus intrepidus Rich and Vickers-Rich, 1999

description: The Flat Rocks locality in the Wonthaggi Formation (Strzelecki Group) of
 the Gippsland Basin, southeastern Australia, hosts fossils of a late
 Barremian vertebrate fauna that inhabited the ancient rift between
 Australia and Antarctica. Known from its dentary, Qantassaurus intrepidus
 Rich and Vickers-Rich, 1999 has been the only dinosaur named from this
 locality. However, the plethora of vertebrate fossils collected from Flat
 Rocks suggests that further dinosaurs await discovery. From this locality,
 we name a new small-bodied ornithopod, Galleonosaurus dorisae n. gen. n.
 sp. from craniodental remains. Five ornithopodan genera are now named from
 Victoria. Galleonosaurus dorisae n. gen. n. sp. is known from five
 maxillae, from which the first description of jaw growth in an Australian
 dinosaur is provided. The holotype of Galleonosaurus dorisae n. gen. n.
 sp. is the most complete dinosaur maxilla known from Victoria. Micro-CT
 imagery of the holotype reveals the complex internal anatomy of the
 neurovascular tract and antorbital fossa. We confirm that Q. intrepidus is
 uniquely characterized by a deep foreshortened dentary. Two dentaries
 originally referred to Q. intrepidus are reassigned to Q. ?intrepidus and
 a further maxilla is referred to cf. Atlascopcosaurus loadsi Rich and
 Rich, 1989. A further ornithopod dentary morphotype is identified, more
 elongate than those of Q. intrepidus and Q. ?intrepidus and with three
 more tooth positions. This dentary might pertain to Galleonosaurus dorisae
 n. gen. n. sp. Phylogenetic analysis recovered Cretaceous Victorian and
 Argentinian nonstyracosternan ornithopods within the exclusively Gondwanan
 clade Elasmaria. However, the large-bodied taxon Muttaburrasaurus langdoni
 Bartholomai and Molnar, 1981 is hypothesised as a basal iguanodontian with
 closer affinities to dryomorphans than to rhabdodontids.
description: NMVP229196-tiffs-6-199MicroCT tiff series, holotypic maxilla (NMV P229196) of Galleonosaurus dorisae (part 1); Zeiss Xradia XRM Versa520 X-Ray Microtomography: voxel size 45.61 µm; power 10 W; voltage 140 kVNMV P229196-tiffs-202-499MicroCT tiff series, holotypic maxilla (NMV P229196) of Galleonosaurus dorisae (Part 2); Zeiss Xradia XRM Versa520 X-Ray Microtomography: voxel size 45.61 µm; power 10 W; voltage 140 kVNMVP229196-tiffs-503-899MicroCT tiff series, holotypic maxilla (NMV P229196) of Galleonosaurus dorisae (part 3); Zeiss Xradia XRM Versa520 X-Ray Microtomography: voxel size 45.61 µm; power 10 W; voltage 140 kVNMVP229196-tiffs-901-1199MicroCT tiff series, holotypic maxilla (NMV P229196) of Galleonosaurus dorisae (part 4); Zeiss Xradia XRM Versa520 X-Ray Microtomography: voxel size 45.61 µm; power 10 W; voltage 140 kVNMV P229196-tiffs-1203-1499MicroCT tiff series, holotypic maxilla (NMV P229196) of Galleonosaurus dorisae (part 5); Zeiss Xradia XRM Versa520 X-Ray Microtomography: voxel size 45.61 µm; power 10 W; voltage 140 kVNMVP229196-tiffs-1505-1689MicroCT tiff series, holotypic maxilla (NMV P229196) of Galleonosaurus dorisae (part 6); Zeiss Xradia XRM Versa520 X-Ray Microtomography: voxel size 45.61 µm; power 10 W; voltage 140 kVTable S1List of cranial specimens examined first-hand in the studyHerne etal Table S1.docxText S1Additional remarks and information on the phylogenetic data and analyses used in the studyHerne etal - Text S1.docxText S2Phylogenetic character listHerne etal - Text S2.docxSupplemental Data 1Phylogenetic dataset (TNT) used in the study. The TNT file can be converted to .nex from the ‘export (nexus format)’ function in TNT, or alternatively can be opened by ‘open file’ in Mesquite and navigate to the file, and save as a ‘...nex’.Herne etal - Suppl Data 1.tnt