The skull of
            <i>Carnotaurus sastrei</i>
            Bonaparte 1985 revisited: insights from craniofacial bones, palate and lower jaw

Cerroni, Mauricio A.; Canale, Juan Ignacio; Novas, Fernando E.

doi:10.1080/08912963.2020.1802445

Cited by 9 publications

(2 citation statements)

References 72 publications

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“…The lateral surface bears a triangular-shaped fossa bounded by well-developed dorsal and anterior rims. A similar lateral fossa is present in Skorpiovenator, Abelisaurus, Llukalkan, Viavenator and Carnotaurus (as noted by Cerroni et al, 2021), but is absent in Spectrovenator, Majungasaurus and Arcovenator. The anterior margin of the ventral ramus is slightly sinusoidal as in Spectrovenator, Carnotaurus and the indeterminate abelisaurid MAU-Pv-LI-582, lacking the anterior swelling observed in Abelisaurus and Majungasaurus, and possibly in Llukalkan and Skorpiovenator.…”

Section: Systematic Palaeontologymentioning

confidence: 69%

A new abelisaurid dinosaur from the end Cretaceous of Patagonia and evolutionary rates among the Ceratosauria

Pol,

Baiano,

Černý

et al. 2024

Cladistics

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Gondwanan dinosaur faunae during the 20 Myr preceding the Cretaceous–Palaeogene (K/Pg) extinction included several lineages that were absent or poorly represented in Laurasian landmasses. Among these, the South American fossil record contains diverse abelisaurids, arguably the most successful groups of carnivorous dinosaurs from Gondwana in the Cretaceous, reaching their highest diversity towards the end of this period. Here we describe Koleken inakayali gen. et sp. n., a new abelisaurid from the La Colonia Formation (Maastrichtian, Upper Cretaceous) of Patagonia. Koleken inakayali is known from several skull bones, an almost complete dorsal series, complete sacrum, several caudal vertebrae, pelvic girdle and almost complete hind limbs. The new abelisaurid shows a unique set of features in the skull and several anatomical differences from Carnotaurus sastrei (the only other abelisaurid known from the La Colonia Formation). Koleken inakayali is retrieved as a brachyrostran abelisaurid, clustered with other South American abelisaurids from the latest Cretaceous (Campanian–Maastrichtian), such as Aucasaurus, Niebla and Carnotaurus. Leveraging our phylogeny estimates, we explore rates of morphological evolution across ceratosaurian lineages, finding them to be particularly high for elaphrosaurine noasaurids and around the base of Abelisauridae, before the Early Cretaceous radiation of the latter clade. The Noasauridae and their sister clade show contrasting patterns of morphological evolution, with noasaurids undergoing an early phase of accelerated evolution of the axial and hind limb skeleton in the Jurassic, and the abelisaurids exhibiting sustained high rates of cranial evolution during the Early Cretaceous. These results provide much needed context for the evolutionary dynamics of ceratosaurian theropods, contributing to broader understanding of macroevolutionary patterns across dinosaurs.

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Section: Systematic Palaeontologymentioning

confidence: 69%

A new abelisaurid dinosaur from the end Cretaceous of Patagonia and evolutionary rates among the Ceratosauria

Pol,

Baiano,

Černý

et al. 2024

Cladistics

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“…Its name refers to two stout-brow horns located over the eyes and directed sideways. According to Bonaparte et al (1990) and Cerroni et al (2020), the horns supported keratinous sheaths. The lower jaw is slender and the teeth are short and stout.…”

Section: Tablementioning

confidence: 94%

Digital 3D models of theropods for approaching body-mass distribution and volume

2021

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The aim of this work is to obtain diverse morphometric data from digitized 3D models of scientifically accurate palaeoreconstructions of theropods from eight representative families. The analysed polyvinyl chloride (PVC) models belong to the genera Coelophysis, Dilophosaurus, Ceratosaurus, Allosaurus, Baryonyx, Carnotaurus, Giganotosaurus, and Tyrannosaurus. The scanned 3D models were scaled considering different body-size estimations of the literature. The 3D analysis of these genera provides information on the skull length and body length that allows for recognition of major evolutionary trends. The skull length/body length in the studied genera increases according with the size of the body from the smallest Coelophysis with a ratio of 0.093 to ratios of 0.119–0.120 for Tyrannosaurus and Giganotosaurus, the largest study theropods. The study of photogrammetric 3D models also provides morphometric information that cannot be obtained from the study of bones alone, but knowing that all reconstructions begin from the fossil bones, such as the surface/volume ratio (S/V). For the studied theropod genera surface/volume ratio ranges from 35.21 for Coelophysis to 5.55 for Tyrannosaurus. This parameter, closely related to the heat dissipation, help in the characterization of the metabolism of extinct taxa. Accordingly, slender primitive forms of the Early Jurassic (i.e. Coelophysis and Dilophosaurus) had relatively smaller skulls and higher mass-specific metabolic rates than the robust large theropods of the Cretaceous (i.e. Giganotosaurus and Tyrannosaurus). This work presents a technique that, when applied to proper dinosaur models, provides extent and accurate data that may help in diverse study areas within the dinosaur palaeontology and palaeobiology.

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New furileusaurian remains from La Invernada (northern Patagonia, Argentina): A site of unusual abelisaurids abundance

Méndez

Gianechini

Paulina‐Carabajal

et al. 2022

Cretaceous Research

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The skull of Carnotaurus sastrei Bonaparte 1985 revisited: insights from craniofacial bones, palate and lower jaw

Cited by 9 publications

References 72 publications

A new abelisaurid dinosaur from the end Cretaceous of Patagonia and evolutionary rates among the Ceratosauria

A new abelisaurid dinosaur from the end Cretaceous of Patagonia and evolutionary rates among the Ceratosauria

Digital 3D models of theropods for approaching body-mass distribution and volume

New furileusaurian remains from La Invernada (northern Patagonia, Argentina): A site of unusual abelisaurids abundance

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