Wintonotitan

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Wintonotitan
Temporal range:
Ma
↓
Silhouette of Wintonotitan wattsi with known skeletal elements
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: †Sauropodomorpha
Clade: †Sauropoda
Clade: †Macronaria
Clade: †Diamantinasauria (?)
Genus: †Wintonotitan
Species:
†W. wattsi
Binomial name
†Wintonotitan wattsi
Hocknull et al., 2009

Wintonotitan (meaning "

titanosauriform dinosaur from Cenomanian (Late Cretaceous)-age[2] Winton Formation of Australia. It is known from partial postcranial
remains.

Description and history

Life restoration

Fossils that are now known under the name Wintonotitan were first found in 1974 by Keith Watts. At the time, the specimens were assigned to an

chevrons, and unidentifiable fragments. QMF 7292 was established as the type specimen of Wintonotitan in 2009 by Scott Hocknull and colleagues. Hocknull suggested that Austrosaurus mckillopi differed only slightly from the QMF 7292, the holotype of Wintonotitan wattsii, and should be considered a nomen dubium. The type species is W. wattsi, honoring the original discoverer.[3]

Palaeoecology

Arm bones

QMF 7292 was found about 60 kilometres (37 mi) northwest of Winton, near

quadrupedal herbivore.[4]

Classification

In their 2009 description, Hocknull et al. found Wintonotitan to be a non-titanosaurian titanosauriform sauropod in their

phylogenetic analyses.[3] A similar placement was also recovered in several analyses in the subsequent years, including by Poropat et al. (2021) in their description of Diamantinasaurus fossil material.[5][6] Their results are displayed in the cladogram
below:

Somphospondyli

The phylogenetic placement of the contemporary sauropods in the Winton Formation (

sister taxon to the Titanosauria within the Somphospondyli. This marked the first time Wintonotitan was recovered within the Diamantinasauria. Their results are displayed in the cladogram below:[9]

Somphospondyli

Titanosauria

Diamantinasauria

Sarmientosaurus

Australotitan ("Cooper"; holotype, EMF102)

AODF 0032 ("Mick"; possible distinct species)

AODF 0836 ("Alex"; referred to Diamantinasaurus)

Diamantinasaurus ("Matilda"; holotype, AODF 0603)

AODF 2296 ("Leo"; possibly Wintonotitan)

Wintonotitan ("Clancy"; holotype, QM F7292)

AODF 0665 ("Trixie"; Diamantinasauria incertae sedis)

AODF 0590 ("McKenzie"; Diamantinasauria incertae sedis)

AODF 0906 ("Ann"; referred to Diamantinasaurus)

Savannasaurus ("Wade"; holotype, AODF 0660)

References

  1. hdl:10044/1/27497
    .
  2. ISSN 0311-5518
    .
  3. ^
    PMID 19584929
    .
  4. ISBN 0-520-24209-2
    .
  5. doi:10.1016/j.cretres.2017.08.012
    .
  6. ISSN 0024-4082
    .
  7. PMC 10090887
    .
  8. doi:10.1080/14772019.2023.2293038
    .
  9. PMC 11011616
    .

External links

Three new dinosaurs discovered in Australia at Wikinews

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