Postcranial skeleton of Campinasuchus dinizi (Crocodyliformes, Baurusuchidae) from the Upper Cretaceous of Brazil, with comments on the ontogeny and ecomorphology of the species

Cotts, Leonardo; Pinheiro, André Eduardo Piacentini; Marinho, Thiago da Silva; Carvalho, Ismar de Souza; Dario, Fabio Di

doi:10.1016/j.cretres.2016.11.003

Cited by 26 publications

(30 citation statements)

References 34 publications

(266 reference statements)

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“…The scapular blade is expanded anteroposteriorly, differing from the patterns described for living crocodiles (Meers, 2003). It is much thinner antero-posteriorly than those of Baurusuchus albertoi, Campinasuchus dinizi and Mariliasuchus amarali (Nascimento and Zaher, 2010;Nobre and Carvalho, 2013;Cotts et al, 2017).…”

Section: Ulnare (Fig 8)mentioning

confidence: 81%

“…The characteristics described for the distal humerus of M. arrudacamposi are also present in U. terrificus, B. albertoi, N. terrestris, A. tsangatsangana, S. clarki and M. amarali (Pol, 2005;Vasconcellos, 2006;Turner, 2006;Nascimento and Zaher, 2010;Sertich and Groenke, 2010;Nobre and Carvalho, 2013). In C. dinizi the humeral diaphysis is more elongated and slightly thinner than in S. maxhechti (Riff and Kellner, 2011;Cotts et al, 2017).…”

Section: Ulnare (Fig 8)mentioning

confidence: 86%

“…The posteriorly positioned concavity at the distal end in M. arrudacamposi, is also observed in B. albertoi and C. dinizi. In Simosuchus clarki and M. amarali this concavity is not evident (Nascimento and Zaher, 2010;Sertich and Groenke, 2010;Nobre and Carvalho, 2013;Cotts et al, 2017).…”

Section: Ulnare (Fig 8)mentioning

confidence: 90%

“…In U. terrificus, B. albertoi, C. dinizi, S. clarki, M. amarali, Y. boliviensis, Caipirasuchus montealtensis, as in M. arrudacamposi, the coracoids are more expanded in the distal than in the proximal portion. The coracoid foramen in these crocodyliform is circular, but in C. dinizi is located in the posterodorsal region and in C. montealtensis it is more compressed (Vasconcellos, 2006;Nascimento and Zaher, 2010;Iori et al, 2016;Cotts et al, 2017).…”

Section: Ulnare (Fig 8)mentioning

confidence: 99%

“…In the coracoids of U. terrificus and C. dinizi the glenoid surface was not preserved (Vasconcellos, 2006;Cotts et al, 2017). In B. albertoi, S. clarki, Y. boliviensis is posterolaterally oriented (Nascimento and Zaher, 2010;Sertich and Groenke, 2010;Leardi et al, 2015).…”

Section: Ulnare (Fig 8)mentioning

confidence: 99%

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The morphofunctional design of Montealtosuchus arrudacamposi (Crocodyliformes, Upper Cretaceous) of the Bauru Basin, Brazil

Tavares

Ricardi-Branco

Carvalho

et al. 2017

Cretaceous Research

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Montealtosuchus arrudacamposi, a Peirosauridae from the Upper Cretaceous of the Bauru Basin, was a Crocodyliformes of terrestrial habits. The fossils analyzed in this study belong to the pectoral girdle (scapula and coracoid) and anterior appendicular skeleton (humerus, radius, ulna, carpals, radiale, ulnale, metacarpals and phalanges). In this study we infer the locomotion habits of M. arrudacamposi. A morphometric, morphofunctional and 3D reconstruction of the elements of the pectoral girdle and the anterior limbs of M. arrudacamposi were performed. For a better understanding of the most plausible pectoral girdle and anterior limb posture, the studied bones were virtually disarticulated and articulated on 3D reconstruction. The herein results obtained indicate the structures present a relatively thin and elongated aspect, thus allowing an interpretation that M. arrudacamposi possessed more slender anterior limbs than living crocodyliforms. This condition allowed for an adducted stance and cursorial habits that would enable movement through terrestrial environments for prey searching.

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Section: Ulnare (Fig 8)mentioning

confidence: 81%

Section: Ulnare (Fig 8)mentioning

confidence: 86%

Section: Ulnare (Fig 8)mentioning

confidence: 90%

Section: Ulnare (Fig 8)mentioning

confidence: 99%

Section: Ulnare (Fig 8)mentioning

confidence: 99%

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The morphofunctional design of Montealtosuchus arrudacamposi (Crocodyliformes, Upper Cretaceous) of the Bauru Basin, Brazil

Tavares

Ricardi-Branco

Carvalho

et al. 2017

Cretaceous Research

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Paleoneurology of Baurusuchus (Crocodyliformes: Baurusuchidae), ontogenetic variation, brain size, and sensorial implications

Dumont

Santucci

Andrade

et al. 2020

The Anatomical Record

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Knowledge on crocodyliform paleoneurology has significantly improved with development of computed tomography. However, studies so far have been able to reconstruct brain endocasts based only on single specimens for each taxon. Here for the first time, we reconstructed brain endocasts for multiple fossil specimens of the same crocodyliform taxon (Baurusuchus), consisting of complete skulls of two medium sized specimens, one large adult, and a late juvenile. In addition, we were able to reconstruct the inner ear anatomy of a fragmentary skull using microtomography. We present estimates of brain size using simple models, based on modern Crocodylia, able to adapt brain to endocranial cavity ratios to expected ontogenetic variation instead of using fixed ratios. We also analyzed relative brain sizes, olfactory ratios, facial sensation, alert head posture, best hearing frequencies, and hearing range. The calculated endocranial volumes showed that they can be greatly altered by taphonomic processes, altering both total and partial endocranial volumes. Reconstructed endocasts are compatible with different degrees of occupation along the endocranial cavity and some of their characteristics might be useful as phylogenetic characters. The relative brain size of Baurusuchus seems to be small in comparison to modern crocodilians. Sensorial abilities were somewhat similar to modern crocodilians and hearing ranges and best mean frequencies remarkably similar to modern taxa, whereas olfactory ratio values are a little higher. Differing from its modern relatives, Baurusuchus hypothesized alert head posture is compatible with a terrestrial habit.

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Cranial and postcranial anatomy of a juvenile baurusuchid (Notosuchia, Crocodylomorpha) and the taxonomical implications of ontogeny

dos Santos,

de Carvalho,

de Oliveira

et al. 2024

The Anatomical Record

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Baurusuchidae comprises a clade of top‐tier terrestrial predators and are among the most abundant crocodyliforms found in the Adamantina Formation, Bauru Basin, Brazil (Campanian‐Maastrichtian). Here, we provide a detailed description of the cranial and postcranial osteology and myology of the most complete juvenile baurusuchid found to date. Although the preservation of juvenile individuals is somewhat rare, previously reported occurrences of baurusuchid egg clutches, a yearling individual, and larger, but skeletally immature specimens, comprise a unique opportunity to track anatomical changes throughout their ontogenetic series. Its cranial anatomy was resolved with the aid of a three‐dimensional model generated by the acquisition of computed tomography data, and its inferred adductor mandibular musculature was compared to that of mature specimens in order to assess possible ontogenetic shifts. A subsequent phylogenetic analysis included the scoring of Gondwanasuchus scabrosus, the smallest baurusuchid species known to date, to evaluate its phylogenetic relations relative to a known juvenile. We find considerable differences between juveniles and adults concerning skull ornamentation and muscle development, which might indicate ontogenetic niche partitioning, and also anatomical and phylogenetic evidence that G. scabrosus corresponds to a young semaphoront lacking mature cranial features.

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Postcranial skeleton of Campinasuchus dinizi (Crocodyliformes, Baurusuchidae) from the Upper Cretaceous of Brazil, with comments on the ontogeny and ecomorphology of the species

Cited by 26 publications

References 34 publications

The morphofunctional design of Montealtosuchus arrudacamposi (Crocodyliformes, Upper Cretaceous) of the Bauru Basin, Brazil

The morphofunctional design of Montealtosuchus arrudacamposi (Crocodyliformes, Upper Cretaceous) of the Bauru Basin, Brazil

Paleoneurology of Baurusuchus (Crocodyliformes: Baurusuchidae), ontogenetic variation, brain size, and sensorial implications

Cranial and postcranial anatomy of a juvenile baurusuchid (Notosuchia, Crocodylomorpha) and the taxonomical implications of ontogeny

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