Uberabasuchus terrificus sp. nov., a New Crocodylomorpha from the Bauru Basin (Upper Cretaceous), Brazil

Carvalho, Ismar de Souza; Ribeiro, Luiz Carlos Borges; Avilla, Leonardo dos Santos

doi:10.1016/s1342-937x(05)71079-0

Cited by 135 publications

(151 citation statements)

References 15 publications

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“…America (and other regions of Gondwana) has remarkably increased since the original studies of Gasparini in the 1970's and 1980's (Carvalho and Bertini, 1999;Ortega et al, 2000;Campos et al, 2001;Carvalho et al, 2004Carvalho et al, , 2005Carvalho et al, , 2011Pol and Apesteguía, 2005;Nobre and Carvalho, 2006;Andrade and Bertini, 2008;Carvalho, 2009, 2011;Kellner et al, 2009Kellner et al, , 2011aMarinho and Carvalho, 2009;Nascimento and Zaher, 2010;Montefeltro et al, 2011;Martinelli et al, 2012;Marinho et al, 2013). The new discoveries, coupled with the inclusion of both Baurusuchidae and Peirosauridae within Notosuchia in recent phylogenetic studies (e.g., Turner and Sertich, 2010;Pol et al, 2012Pol et al, , 2014, revealed a previously unsuspected diversity of Notosuchian crocodyliforms.…”

Section: The Diversity Of Cretaceous Crocodyliforms From Southmentioning

confidence: 99%

“…A strong component of recent research on notosuchians has been the use of cladistics analysis for testing the relationships of Notosuchia Pol, 2003;Carvalho et al, 2004;Turner and Sertich, 2010;Andrade et al, 2011;Montefeltro et al, 2011;Pol et al, 2012Pol et al, , 2014. Many of these studies are now corroborating the monophyly of the four Cretaceous clades early recognized by Gasparini for South American forms in pioneer contributions during her early career (i.e., Uruguaysuchidae, Peirosauridae, Baurusuchidae, and a clade allying Notosuchus and closely related forms; Gasparini, 1971Gasparini, , 1972Gasparini, , 1982.…”

Section: The Diversity Of Cretaceous Crocodyliforms From Southmentioning

confidence: 99%

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Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

2015

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Section: The Diversity Of Cretaceous Crocodyliforms From Southmentioning

confidence: 99%

Section: The Diversity Of Cretaceous Crocodyliforms From Southmentioning

confidence: 99%

Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

2015

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“…De esta manera, la anatomía postcraneana de las especies de cocodrilos cretácicos ha permanecido postergada en su análisis, como ya ha sido notado por varios autores (Pol, 1999a,b). Más recientemente, sin embargo, algunos caracteres postcraneanos han sido incluidos en propuestas filogenéticas y se ha puesto de manifiesto su valor taxonómico y filogenético (Pol, 1999(Pol, a,b,c, 2003Ortega et al, 2000;Sereno et al, 2003;Carvalho et al, 2004;Turner, 2006) en contra de hipótesis previas que no incluían caracteres postcraneanos en las hipótesis filogenéticas propuestas para este grupo (Langston, 1975;Clark, 1994).…”

Section: P R O V a Sunclassified

Un nuevo Mesoeucrocodylia cretácico del norte de la Cuenca Neuquina, Argentina

Arcucci¹,

Filippi²,

Calvo³

2011

Rev. bras. paleontol.

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-A NEW CRETACEOUS MESOEUCROCODYLIA FROM THE NORTH OF THE NEUQUÉN BASIN, ARGENTINA. In this contribution, a new specimen of Mesoeucrocodylia from levels attributed to the Plottier Formation (Cretaceous, Upper Coniacian) is described in the locality Yacimiento Narambuena, Rincón de los Sauces, in the north section of the Neuquén Province. The material includes an incomplete subadult specimen with mostly articulated postcranium of an approximate length of 60 cm. The study and comparisons to allow distinguish the specimen from other Mesoeucrocodylia previously known from this same basin and suggest the presence of a new taxon, increasing the diversity of this clade in this period in the Neuquén Basin. The specimen from Rincon de los Sauces presents postcraneal characters previously attributed to Notosuchia and Neosuchia, both clades mainly defined by cranial characters. This set of primitive and derived characters prevents the location of its precise phylogenetic position among the Mesoeucrocodylia.

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“…One of the most striking features in the endocast of Pelagosaurus, as compared to 313 Gavialis and other crocodile-line archosaurs (Hopson, 1979;Kley et al, 2010; Lautenschlager & 314 Butler, 2016), is the greatly enlarged pituitary fossa, which emerges posteroventrally from the 315 cerebrum just anterior to the optic lobe region (Fig. 5).…”

mentioning

confidence: 99%

“…The outline of the cerebrum in Pelagosaurus in dorsal view 297 is symmetrical along its length (Fig. 5A), whereas the cerebrum of Gavialis, phytosaurs 298 (Holloway, Claeson & O'Keefe, 2013; Lautenschlager & Butler, 2016) and other 299 crocodylomorphs (Edinger, 1938; Colbert, 1946; Hopson, 1979;Kley et al, 2010) is most 300 strongly expanded posteriorly (Fig. 5D).…”

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confidence: 99%

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Supplemental Information 1: Supplementary Figure 1: Integrative Three-Dimensional Reconstruction of the Skull and Endocranial M

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Thalattosuchians were highly specialised marine archosaurs of the Jurassic and Early Cretaceous, and represent a peak of aquatic adaptation among crocodylomorphs.Relatively little is known of their endocranial anatomy or its relevance for the evolution of sensory systems, physiology, and other aspects of biology. Nevertheless, such data have significance for two reasons: (1) thalattosuchians represent an important data point regarding adaptation to marine life in tetrapods; and (2) as early-diverging members of the crocodylian stem-lineage, thalattosuchians provide information on the evolutionary assembly of the brain and other endocranial structures in crocodylomorphs. Here we use µCT data to virtually reconstruct the brain and sinuses of Pelagosaurus typus, an early thalattosuchian with plesiomorphic traits of relevance to the split between the two major subgroups: Teleosauroidea and Metriorhynchoidea. Interpreted in a phylogenetic context, these data indicate several endocranial features as likely synapomorphies of Thalattosuchia, including: a pyramidal morphology of the semicircular canals, the presence of an elongate cochlear duct that may indicate enhanced hearing ability, the presence of large, paired canals extending anteriorly from an enlarged pituitary fossa, a relatively straight brain (possibly due to the presence of large, laterally placed orbits) and an enlarged dorsal longitudinal sinus that is confluent with the paratympanic sinus system. Notably, we document a large expansion of the nasal cavity anterior to the orbits in Pelagosaurus as an osteological correlate of an enlarged salt gland previously only documented in Late Jurassic metriorhynchoids. This is the first direct evidence of this structure in early thalattosuchians. Pelagosaurus also shares the presence of paired olfactory tracts with metriorhynchoids, and shows an enlarged cerebrum, which may also be present in teleosauroids. Taken together, our findings indicate that physiological and sensory adaptations to marine life occurred early in thalattosuchians evolution, predating 32 sinus that is confluent with the paratympanic sinus system. Notably, we document a large 33 expansion of the nasal cavity anterior to the orbits in Pelagosaurus as an osteological correlate of 34 an enlarged salt gland previously only documented in Late Jurassic metriorhynchoids. This is the 35 first direct evidence of this structure in early thalattosuchians. Pelagosaurus also shares the 36 presence of paired olfactory tracts with metriorhynchoids, and shows an enlarged cerebrum, 37 which may also be present in teleosauroids. Taken together, our findings indicate that 38 physiological and sensory adaptations to marine life occurred early in thalattosuchians evolution, 39 predating the origins of flippers, tail flukes, and hydrodynamic body forms seen later in 40 metriorhynchoids. 42 INTRODUCTION43 Thalattosuchia is a radiation of marine crocodylomorphs that attained a worldwide distribution at 44 low latitudes during the Early Jurassic -Early Cretaceous (Manni...

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Uberabasuchus terrificus sp. nov., a New Crocodylomorpha from the Bauru Basin (Upper Cretaceous), Brazil

Cited by 135 publications

References 15 publications

Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

Un nuevo Mesoeucrocodylia cretácico del norte de la Cuenca Neuquina, Argentina

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