First endocranial description of a South American hadrosaurid: The neuroanatomy of Secernosaurus koerneri from the Late Cretaceous of Argentina

• Autorzy: Becerra M.G. , Paulina-Carabajal A. , Cruzado-Caballero P. , Taborda J.R.A.
• Języki publikacji: EN

Abstrakty

EN

The endocranial morphology of Secernosaurus koerneri (= Kritosaurus australis junior synonym), a hadrosaurid from the Upper Cretaceous of Argentina, was studied using latex and digital endocasts based on three fragmentary braincases. This new information allowed describing and comparing the neuroanatomy of this South American representative of the clade for the first time. The endocast morphology is mostly complete (except for the pituitary and the inner ear regions), and most cranial nerves and some blood vessels were reconstructed. Also, some features of the inner ear were observed in the CT scans, nonetheless its incompleteness restricts further comparisons. Secernosaurus koerneri shares its overall endocranial morphology with saurolophinid hadrosaurids, indicating a conservative brain morphology for Cretaceous hadrosaurids worldwide. The novel cranial information increases the knowledge of the neuroanatomy in hadrosaurids by adding a southern perspective, since knowledge on the endocranial anatomy of the lineage is biased by species from North America.

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2018
• Tom: 63
• Numer: 4
• Opis fizyczny: p.693-702,fig.,ref.

Twórcy

autor

Becerra M.G.

• Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Museo Paleontologico Egidio Feruglio (MEF), Fontana 140, Trelew U9100GYO, Chubut, Argentina

autor

Paulina-Carabajal A.

• Instituto de Investigaciones en Biodiversidad y Medioambiente (CONICET-UNCo), Quintral 1350, San Carlos de Bariloche 8400, Rio Negro, Argentina

autor

Cruzado-Caballero P.

• Instituto de Investigacion en Paleobiologia y Geologia, Universidad Nacional de Rio Negro (CONICET-UNRN), Av. General Roca 1242, General Roca 8332, Rio Negro, Argentina

autor

Taborda J.R.A.

• Centro de Investigaciones en Ciencias de la Tierra (CICTERRA), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Universidad Nacional de Cordoba, FCEFyN, Velez Sarsfield 1611, Ciudad Universitaria X5016GCA, Cordoba, Argentina

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Identyfikatory

DOI

10.4202/app.00526.2018