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Diamantinasaurus matildae
Taxonomy
Diamantinasaurus matildae was named by Hocknull et al. (2009). Its type specimen is AODF 603, a set of postcrania, and it is a 3D body fossil. Its type locality is Matilda Site, Elderslie Station (AODL 0085), which is in a Cenomanian fine channel fill claystone/sandstone in the Winton Formation of Australia. It is the type species of Diamantinasaurus.
Synonymy list
Year | Name and author |
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2009 | Diamantinasaurus matildae Hocknull et al. p. 4 figs. 2A, B, 3-12 |
2011 | Diamantinasaurus matildae Grellet-Tinner et al. p. 625 |
2011 | Diamantinasaurus matildae Molnar p. 305 |
2012 | Diamantinasaurus matildae D'Emic |
2012 | Diamantinasaurus matildae White et al. p. 1 |
2013 | Diamantinasaurus matildae Tschopp and Mateus p. 332 |
2015 | Diamantinasaurus matildae Poropat et al. |
2016 | Diamantinasaurus matildae Salisbury et al. p. 125 |
2017 | Diamantinasaurus matildae Gorscak et al. p. 11 |
2020 | Diamantinasaurus matildae Poropat et al. p. 1 |
2021 | Diamantinasaurus matildae Frauenfelder et al. p. 354 |
2021 | Diamantinasaurus matildae Poropat et al. |
2021 | Diamantinasaurus matildae Poropat et al. p. 32 |
2021 | Diamantinasaurus matildae Rigby et al. p. 3 |
2022 | Diamantinasaurus matildae Navarro et al. p. 341 |
2023 | Diamantinasaurus matildae Poropat et al. p. 7–8 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Diamantinasaurus matildae Hocknull et al. 2009
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Diagnosis
Reference | Diagnosis | |
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S. A. Hocknull et al. 2009 | Diamantinasaurus matildae gen. et sp. nov. is characterised by the following unique association of features. Dorsal ribs plank-like with camellate pneumatic cavities in the proximal-most expansion. Transverse processes of the sacral vertebrae with camellate pneumatic cavities. Scapular glenoid bevelled medially and expanded medio-laterally; scapular blade flat and rectangular in cross-section; acromial blade broad and dish-shaped with poorly developed acromial ridge. Crescentic-shaped sternal plate. Humerus stout; intermediate robusticity (autapomorphic); deltopectoral crest prominent, extending to mid-shaft; proximal border shallowly sigmoidal; proximo-lateral corner square; distal condyles merged and flat extending only just onto anterior face of shaft; proximal breadth 50% of total length. Ulna stout; cranio-medial process massive and concave; distal condyle ovo-triangular. Metacarpals massive with undivided condyles and marked distal rugosities; Mc III longest followed by Mc II, Mc I, Mc IV and Mc V; phalangeal articular facets on external face of shaft on Mc I–IV. Phalanges present on digits I–IV (phalangeal formula 2-1-1-1-0); spike-like ungual present on digit I. Phalanges on digits II–IV rounded and broadest transversely; Mc III phalange heavily reduced (autapomorphic). Ilium massive with broad rounded preacetabular lobe directed perpendicular to sacral axis; pneumatic cavities present within iliac blade. Pubes massive and long, fused to ischia via a shallowly sigmoidal pubic apron. Ischia with distinct iliac peduncle on a narrow shaft leading to a broad ischial blade, which is fused to the opposite ischium along the mid-line of the pelvic girdle. Femur robust with lateral bulge; intermediate robusticity (autapomorphic); distal condyles bevelled dorso-medially; shaft elliptical in cross-section and deflected medially. Tibia robust; proximal articular condyle sub-equally expanded; cnemial crest projects cranially then laterally (autapomorphic); ovoid distal articular surface; distal breadth more than twice that of mid-shaft. Fibula expanded proximally; intermediate robusticity (autapomorphic); distal articular surface bevelled cranio-medially. Astragalus quadrangular; posterior fossa undivided. | |
S. L. Rigby et al. 2021 | To the diagnosis of Diamantinasaurus matildae presented by Poropat et al. (2021a), we append one local autapomorphy: scapula medial surface with distinct tuberosity just posterior to the junction of the acromion and the distal blade (also identified by Hocknull et al., 2021). | |
S. F. Poropat et al. 2023 | Newly identified diagnostic characteristics
Quadratojugal and quadrate with horizontal ridge present across both elements anterior to their articulation point (lateral surface of quadrate, medial surface of quadratojugal). |
Measurements
No measurements are available
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Source: infrao = infraorder | |||||
Reference: Marsh 1875 |
Age range: Late/Upper Cenomanian or 99.60000 to 93.50000 Ma
Collections (4 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Cenomanian | Australia (Queensland) | Diamantinasaurus matildae (type locality: 90140 225325 229882) | |
Late/Upper Cenomanian - Early/Lower Turonian | Australia (Queensland) | Austrosaurus sp. (62553) |