Description of a sauropod dinosaur braincase (Titanosauridae) from the Late Cretaceous Rio Colorado Subgroup, Patagonia

Calvo, Jorge O.; Kellner, Alexander W.A.

doi:10.1590/s0001-37652006000100015

Cited by 23 publications

(2 citation statements)

References 5 publications

(2 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There are no other described Argentinean sauropod endocasts, although new discoveries of titanosaur braincases have dramatically increased in the past decade (e.g., Calvo and Gonzalez Riga, 2004; Martinelli and Forasiepi, 2004; Calvo and Kellner, 2006; García et al, 2008; Filippi and Garrido, 2008; Filippi et al, 2011). In this study a detailed description of the endocranial morphology of Bonatitan , Antarctosaurus, and the unnamed titanosaurid MGPIFD‐GR 118 is provided, including the first observations on the inner ear morphology of the two first taxa.…”

Section: Introductionmentioning

confidence: 99%

Neuroanatomy of Titanosaurid Dinosaurs From the Upper Cretaceous of Patagonia, With Comments on Endocranial Variability Within Sauropoda

Carabajal

2012

Anat Rec

View full text Add to dashboard Buy / Rent full text

The purpose of this study is to provide a detailed description of the neuroanatomy of Bonatitan, Antarctosaurus, and an unnamed titanosaur from Río Negro, Argentina including the first observations on the inner ear of the two first taxa using CT scans. The materials were compared with previously described sauropod endocasts and other less complete titanosaur braincases from Argentina. The cranial endocasts show the general morphology of other sauropods being bulbous, anteroposteriorly short and transversely wide, and with enlarged and posteroventrally projected pituitary body. Particular titanosaur traits are the extremely short and horizontal olfactory tract, the absence of a floccular process and a single root for cranial nerve XII. In addition, in the basicranium the abducens nerve (CN VI) does not penetrates the pituitary fossa and the internal carotid artery enters the medial aspect of the basipterygoid process, resulting in an external opening for this vessel that is not visible in lateral view of the braincase. The titanosaurid inner ear also exhibits particular traits, such as robust semicircular canals, and anterior and posterior semicircular canals that are subequal in size. The variation observed in the sauropod endocranium indicates an evolutionary tendency in titanosaurs toward the anteroposterior shortening of the midbrain, and the reduction in size of the semicircular canals of the inner ear, in particular the anterior semicircular canal. This, together with the lack of floccular process suggests a narrower range of movements of the head for this clade.

show abstract

“…Particularmente en Argentina, se describió en detalle la neuroanatomía del dicraeosáurido Amargasaurus Paulina Carabajal et al, 2014), el rebaquisáurido Limaysaurus (Calvo y Salgado, 1995;Paulina Carabajal y Calvo, 2015) y numerosos titanosaurios incluyendo Antarctosaurus, Bona-titan, Narambuenatitan, Saltasaurus y varios neurocráneos aislados (e.g., Calvo y Kellner, 2006;Paulina Carabajal y Salgado, 2007;García et al, 2008;Paulina Carabajal et al, 2008;.…”

Section: Sauropodaunclassified

Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

2015

PE-APA

View full text Add to dashboard Buy / Rent full text

“…Particularmente en Argentina, se describió en detalle la neuroanatomía del dicraeosáurido Amargasaurus (Powell, 2003;Paulina Carabajal et al, 2014), el rebaquisáurido Limaysaurus (Calvo y Salgado, 1995;Paulina Carabajal y Calvo, 2015) y numerosos titanosaurios incluyendo Antarctosaurus, Bonatitan, Narambuenatitan, Saltasaurus y varios neurocráneos aislados (e.g., Huene, 1929;Powell, 2003;Calvo y Kellner, 2006;Paulina Carabajal y Salgado, 2007;García et al, 2008;Paulina Carabajal et al, 2008;.…”

Section: Sauropodaunclassified

Guía Para El Estudio De La Neuroanatomía De Dinosaurios Saurischia, Con Énfasis en Formas Sudamericanas

Carabajal¹

2015

PEAPA

View full text Add to dashboard Buy / Rent full text

“…A concavity on an indeterminate titanosaur braincase (MUCPv 334) described by Calvo and Kellner (2006) as a 'basisphenoidal depression' appears to be comparable with the single fossa on the posterior surface of the basal tubera of Saltasaurus. This concavity on MUCPv 334 is considered to be located on the ventral margin of the basal tubera (e.g., Mannion 2011).…”

Section: Description and Comparisonsmentioning

confidence: 99%

<p><strong>A new titanosauriform sauropod (Dinosauria: Saurischia) from the Lower Cretaceous of Hyogo, Japan</strong></p>

Saegusa

Ikeda

2014

Zootaxa

433

View full text Add to dashboard Buy / Rent full text

A new genus and species of titanosauriform sauropod is erected based on a partial skeleton found in the Lower Cretaceous Sasayama Group of Hyogo Prefecture, SW Japan. The new taxon is here named as Tambatitanis amicitiae gen. et sp. nov., which is diagnosed by the following features of the caudal vertebrae, chevrons and braincase: the postzygapophysis and the summit of the neural spine of the anterior caudal vertebrae are located beyond the posterior border of the centrum, the spine of the anterior caudal vertebrae is curved strongly anteriorly and bow-shaped in lateral view, the summit of the neural spine is expanded and hemispherical with its anterior face excavated by the posterodorsal extension of a deep and narrow SPRF, the transverse process of the anterior caudal vertebrae are short and L shaped, the anterior chevron is the longest among sauropods in proportion to body size, the distal ends of the anterior chevrons are rod-shaped, the distal ends of the mid chevrons are transversely thin and anteroposteriorly long without cranial processes, and the dorsal border of the shaft of the paroccipital process that forms the ventral margin of the posttemporal fenestra is short mediolaterally and V-shaped in posterior view. A phylogenetic analysis suggests that T. amicitiae is a basal titanosauriform, possibly belonging to the East Asian endemic clade Euhelopodidae. The caudals and chevrons are described in detail in order to document highly autapomorphic features of the new taxon as well as potentially phylogenetically informative characters. The discovery of T. amicitiae suggests that East Asian basal titanosauriforms were diverse not only in the number of the taxa but also in the morphological variation of the caudal elements.

show abstract

“…Around the world, there are only a few titanosaur with some complete skulls, such those of Nemegtosaurus mongoliensis (Nowinsky 1971), Rapetosaurus krausei (Curry rogers and Forster 2004), Sarmientosaurus musacchioi (Martinez et al 2016), Malawisaurus dixeyi (haughton 1928) and Tapuiasaurus macedoi (Zaher et al 2011) and several complete embrionyc titanosaur skulls (Chiappe et al 2001. Moreover, there are other papers related to less complete cranial materials such as either partial cranium or basicranium in Saltasaurus loricatus (Bonaparte and Powell 1980), Quesitosaurus orientalis (Kurzanov and Banikov 1983), Muyelensaurus pecheni (Calvo et al 2007a), a surangular, angular, prefrontal and teeth in Rinconsaurus caudamirus (Calvo and riga 2003), teeth in Ampelosaurus atacis (Le Loeuff 1995, Alamosaurus sanjuanensis (Kues et al 1980) a postorbital and teeth in Quetecsaurus rusconii (Gonzalez riga and Ortiz 2014), some teeth in Alamosaurus sanjuanensis (Kues et al 1980), a basicranium and teeth in Mongolosaurus haplodon (Gilmore 1933, Mannion 2010, a Maxilla in Maxakalisaurus topai (Kellner et al 2006) and in Dreadnoughtus schrani (Lacovara et al 2014), in several unnamed basicraniums (Le Loeuff et al 1989, Tidwell and Carpenter 2003, Calvo and Kellner 2006, García et al 2008, and several maxilla (Calvo et al 2014, Sciutto and Martinez 1994.…”

Section: Introductionmentioning

confidence: 99%

Baalsaurus mansillai gen. et sp. nov. a new titanosaurian sauropod (Late Cretaceous) from Neuquén, Patagonia, Argentina

Calvo

Riga

2019

An. Acad. Bras. Ciênc.

Self Cite

View full text Add to dashboard Buy / Rent full text

We describe a dentary of a new titanosaur sauropod, Baalsaurus mansillai, gen. et sp. nov. from the Late Cretaceous of Patagonia, Argentina. the material comes from the Portezuelo Formation, Neuquén Group. titanosaur sauropods lower jaws are scarce and only nine taxa with dentaries have been described. there are two types of morphology in titanosaur dentaries; "L" shaped or "U" shaped based on the shape, without a phylogenetic issue. In this paper; we recognize a new taxa, Baalsaurus mansillai, represented by an "L" shaped dentary with three apomorphic characters that are not present in other taxa: dentary alveoli with 10 teeth in the anterior ramus, a ventrally and anteriorly inclined symphysis and a wide ventral Meckelian groove surrounded by a thin lamina that forms a keel on the ventral border of the dentary.

show abstract

Description of a sauropod dinosaur braincase (Titanosauridae) from the Late Cretaceous Rio Colorado Subgroup, Patagonia

Cited by 23 publications

References 5 publications

Neuroanatomy of Titanosaurid Dinosaurs From the Upper Cretaceous of Patagonia, With Comments on Endocranial Variability Within Sauropoda

Reptiles Extintos - Volumen en Homenaje a Zulma Gasparini

Guía Para El Estudio De La Neuroanatomía De Dinosaurios Saurischia, Con Énfasis en Formas Sudamericanas

<p><strong>A new titanosauriform sauropod (Dinosauria: Saurischia) from the Lower Cretaceous of Hyogo, Japan</strong></p>

Baalsaurus mansillai gen. et sp. nov. a new titanosaurian sauropod (Late Cretaceous) from Neuquén, Patagonia, Argentina

Contact Info

Product

Resources

About