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Re-description of the braincase of the rebbachisaurid sauropod Limaysaurus tessonei and novel endocranial information based on CT scans.
An Acad Bras Cienc. 2021; 93(suppl 2):e20200762.AA

Abstract

CT scans of the type braincase of Limaysaurus tessonei (MUCPv-205) allowed the first study of the endocranial cavities (brain and inner ear) for this South American taxon. Comparisons of the cranial endocast of L. tessonei with other sauropods indicate that 1) South American rebbachisaurids are more similar to each other than to Nigersaurus, and 2) certain association of traits are present in all known rebbachisaurid cranial endocasts, such as lack of an enlarged dorsal expansion, poorly laterally projected cerebral hemispheres, presence of a small flocculus of the cerebellum, markedly long passage for the facial nerve (CN VII), markedly inclined pituitary, and presence of a passage for the basilar artery communicating the floor of the endocranial cavity and the pituitary fossa. The relatively enlarged olfactory region indicates that smell was an important sense for this group of dinosaurs, suggesting different olfactory capabilities when compared to coeval titanosaurs.

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Authors+Show Affiliations

Paulina-Carabajal A
CONICET/Universidad Nacional del Comahue, Instituto de Investigaciones en Biodiversidad y Medioambiente, Quintral 1250, 8400, San Carlos de Bariloche, Argentina.
Calvo JO
Universidad Nacional del Comahue, Fac. Ingeniería-Museo Geología y Paleontología, Grupo de Transferencia Proyecto Dino, Ruta Prov. 51, Km 65, Neuquén, Argentina.

MeSH

AnimalsBiological EvolutionBrainDinosaursFossilsSkullTomography, X-Ray Computed

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33533794

Citation

Paulina-Carabajal, Ariana, and Jorge O. Calvo. "Re-description of the Braincase of the Rebbachisaurid Sauropod Limaysaurus Tessonei and Novel Endocranial Information Based On CT Scans." Anais Da Academia Brasileira De Ciencias, vol. 93, no. suppl 2, 2021, pp. e20200762.
Paulina-Carabajal A, Calvo JO. Re-description of the braincase of the rebbachisaurid sauropod Limaysaurus tessonei and novel endocranial information based on CT scans. An Acad Bras Cienc. 2021;93(suppl 2):e20200762.
Paulina-Carabajal, A., & Calvo, J. O. (2021). Re-description of the braincase of the rebbachisaurid sauropod Limaysaurus tessonei and novel endocranial information based on CT scans. Anais Da Academia Brasileira De Ciencias, 93(suppl 2), e20200762. https://doi.org/10.1590/0001-3765202120200762
Paulina-Carabajal A, Calvo JO. Re-description of the Braincase of the Rebbachisaurid Sauropod Limaysaurus Tessonei and Novel Endocranial Information Based On CT Scans. An Acad Bras Cienc. 2021;93(suppl 2):e20200762. PubMed PMID: 33533794.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Re-description of the braincase of the rebbachisaurid sauropod Limaysaurus tessonei and novel endocranial information based on CT scans. AU - Paulina-Carabajal,Ariana, AU - Calvo,Jorge O, Y1 - 2021/01/29/ PY - 2020/05/18/received PY - 2020/11/16/accepted PY - 2021/2/3/entrez PY - 2021/2/4/pubmed PY - 2021/2/7/medline SP - e20200762 EP - e20200762 JF - Anais da Academia Brasileira de Ciencias JO - An Acad Bras Cienc VL - 93 IS - suppl 2 N2 - CT scans of the type braincase of Limaysaurus tessonei (MUCPv-205) allowed the first study of the endocranial cavities (brain and inner ear) for this South American taxon. Comparisons of the cranial endocast of L. tessonei with other sauropods indicate that 1) South American rebbachisaurids are more similar to each other than to Nigersaurus, and 2) certain association of traits are present in all known rebbachisaurid cranial endocasts, such as lack of an enlarged dorsal expansion, poorly laterally projected cerebral hemispheres, presence of a small flocculus of the cerebellum, markedly long passage for the facial nerve (CN VII), markedly inclined pituitary, and presence of a passage for the basilar artery communicating the floor of the endocranial cavity and the pituitary fossa. The relatively enlarged olfactory region indicates that smell was an important sense for this group of dinosaurs, suggesting different olfactory capabilities when compared to coeval titanosaurs. SN - 1678-2690 UR - https://www.unboundmedicine.com/medline/citation/33533794/Re_description_of_the_braincase_of_the_rebbachisaurid_sauropod_Limaysaurus_tessonei_and_novel_endocranial_information_based_on_CT_scans_ DB - PRIME DP - Unbound Medicine ER -