First elaphrosaurine theropod dinosaur (Ceratosauria: Noasauridae) from Australia — A cervical vertebra from the Early Cretaceous of Victoria

Poropat, Stephen F.; Pentland, Adele H.; Duncan, Ruairidh J.; Bevitt, Joseph J.; Vickers-Rich, Patricia; Rich, Thomas H.

doi:10.1016/j.gr.2020.03.009

Cited by 13 publications

(13 citation statements)

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“…Several features of the tibia and astragalus noted to unite Santanaraptor and tyrannosauroids among theropods by Delcourt & Grillo [19], including the absence of an accessory ridge placed on the lateral surface of the cnemial crest of the tibia and a horizontal groove across the astragalar condyles, are widely distributed among coelurosaurs (see matrix in [9]). Poropat et al [32] discussed the misidentification of some noasaurids as ornithomimosaurs. Given the close phylogenetic positions and hindlimb anatomy of tyrannosauroids and ornithomimosaurs (e.g.…”

Section: Phylogenetic Methodologymentioning

confidence: 99%

Dinosaurs from the Santonian–Campanian Atlantic coastline substantiate phylogenetic signatures of vicariance in Cretaceous North America

Brownstein

2021

R. Soc. open sci.

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During the Cretaceous, diversifications and turnovers affected terrestrial vertebrates experiencing the effects of global geographical change. However, the poor fossil record from the early Late Cretaceous has concealed how dinosaurs and other terrestrial vertebrates responded to these events. I describe two dinosaurs from the Santonian to Early Campanian of the obscure North American paleolandmass Appalachia. A revised look at a large, potentially novel theropod shows that it likely belongs to a new clade of tyrannosauroids solely from Appalachia. Another partial skeleton belongs to an early member of the Hadrosauridae, a highly successful clade of herbivorous dinosaurs. This skeleton is associated with the first small juvenile dinosaur specimens from the Atlantic Coastal Plain. The tyrannosauroid and hadrosaurid substantiate one of the only Late Santonian dinosaur faunas and help pinpoint the timing of important anatomical innovations in two widespread dinosaur lineages. The phylogenetic positions of the tyrannosauroid and hadrosaurid show Santonian Appalachian dinosaur faunas are comparable to coeval Eurasian ones, and the presence of clades formed only by Appalachian dinosaur taxa establishes a degree of endemism in Appalachian dinosaur assemblages attributable to episodes of vicariance.

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Section: Phylogenetic Methodologymentioning

confidence: 99%

Dinosaurs from the Santonian–Campanian Atlantic coastline substantiate phylogenetic signatures of vicariance in Cretaceous North America

Brownstein

2021

R. Soc. open sci.

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“…The centrum anterior articular surface of posterior cervical is concave, with transverse width 1.5 times greater than the dorsoventral height. According to [15], postaxial cervical centra with concave anterior articular surfaces are only present in elaphrosaurines among ceratosaurs. The centrum is not constricted in the middle and much transversely wider compared with Elaphrosaurus [12].…”

Section: (F ) Description and Comparisonmentioning

confidence: 99%

“…The strict consensus tree of the TNT phylogenetic analysis with wildcard taxa pruned reveals the monophyletic Noasauridae, Noasaurinae, Elaphrosaurinae, and the clade containing Kiyacursor, Afromimus and the Eumeralla Formation taxon within Noasauridae (figure 3a; electronic supplementary material, figure S17). Elaphrosaurinae (Elaphrosaurus + Limusaurus) and Noasaurinae have been considered traditionally the sister taxa [3,12,15,16,39,42,52]. However, other phylogenetic analyses place Elaphrosaurinae outside Abelisauroidea (Abelisauridae + Noasauridae) [4,24,36,43,[53][54][55][56][57].…”

Section: (B) Phylogenymentioning

confidence: 99%

“…In having long mid-cervicals, Kiyacursor is similar to Elaphrosaurus and Limusaurus and differs from large sized ceratosaurs that have short cervicals [5,12–14]. The anterior cervical is remarkably similar to the elaphrosaurine cervical from the Albian Eumeralla Formation of Australia [15]. There are a large pneumatic foramen on the ventral side of diapophysis and a prominent circular postzygapophyseal centrodiapophyseal fossa (pocdf) anteroventral to the postzygapophysis.…”

Section: Introductionmentioning

confidence: 99%

“…Such foramina were known previously only for Vespersaurus (dorsal foramina 1 in [16]). The prezygapophyses are transversely narrow, longer than wide, as in Elaphrosaurus , Eumeralla Formation elaphrosaurine and Vespersaurus [12,15,16], being about half the width of the neural canal. In many theropods, including abelisaurids, the cervical prezygapophyses are wider than long [12,14,18,19].…”

Section: Introductionmentioning

confidence: 99%

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The last ceratosaur of Asia: a new noasaurid from the Early Cretaceous Great Siberian Refugium

Averianov,

Skutschas,

Atuchin

et al. 2024

Proc. R. Soc. B.

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The noasaurid ceratosaur Kiyacursor longipes gen. et sp. nov. is described based on a fragmentary skeleton including cervical vertebra, pectoral girdle, humerus and hind limbs from the Lower Cretaceous (Aptian) Ilek Formation at Shestakovo 1 locality in Western Siberia, Russia. This is the first ceratosaur from the Early Cretaceous of Asia, extending the stratigraphic range of Ceratosauria by 40 Myr on that continent. Kiyacursor shares unique hind limb proportions with Elaphrosaurus and Limusaurus , suggesting improved cursorial ability. These taxa show an ostrich-like specialization of the pes, with a large third metatarsal and greatly reduced second metatarsal. By contrast, all other fast running non-avian theropod dinosaurs have an arctometatarsalian pes, with the third metatarsal strongly reduced proximally. The new taxon lived in the Early Cretaceous ecosystem containing a number of other Jurassic relics, such as stem salamanders, protosuchian and shartegosuchid crocodyliforms, tritylodontid synapsids and docodontan mammaliaforms.

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Assessing the palaeobiology of Vespersaurus paranaensis (Theropoda, Noasauridae), Cretaceous, Bauru Basin – Brazil, using Finite Element Analysis

Barbosa,

Langer,

de Oliveira Martins

et al. 2023

Cretaceous Research

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First elaphrosaurine theropod dinosaur (Ceratosauria: Noasauridae) from Australia — A cervical vertebra from the Early Cretaceous of Victoria

Cited by 13 publications

References 93 publications

Dinosaurs from the Santonian–Campanian Atlantic coastline substantiate phylogenetic signatures of vicariance in Cretaceous North America

Dinosaurs from the Santonian–Campanian Atlantic coastline substantiate phylogenetic signatures of vicariance in Cretaceous North America

The last ceratosaur of Asia: a new noasaurid from the Early Cretaceous Great Siberian Refugium

Assessing the palaeobiology of Vespersaurus paranaensis (Theropoda, Noasauridae), Cretaceous, Bauru Basin – Brazil, using Finite Element Analysis

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