Tags

Type your tag names separated by a space and hit enter

Endocast of the Late Triassic (Carnian) dinosaur Saturnalia tupiniquim: implications for the evolution of brain tissue in Sauropodomorpha.
Sci Rep. 2017 09 20; 7(1):11931.SR

Abstract

The evolutionary history of dinosaurs might date back to the first stages of the Triassic (c. 250-240 Ma), but the oldest unequivocal records of the group come from Late Triassic (Carnian - c. 230 Ma) rocks of South America. Here, we present the first braincase endocast of a Carnian dinosaur, the sauropodomorph Saturnalia tupiniquim, and provide new data regarding the evolution of the floccular and parafloccular lobe of the cerebellum (FFL), which has been extensively discussed in the field of palaeoneurology. Previous studies proposed that the development of a permanent quadrupedal stance was one of the factors leading to the volume reduction of the FFL of sauropods. However, based on the new data for S. tupiniquim we identified a first moment of FFL volume reduction in non-sauropodan Sauropodomorpha, preceding the acquisition of a fully quadrupedal stance. Analysing variations in FFL volume alongside other morphological changes in the group, we suggest that this reduction is potentially related to the adoption of a more restricted herbivore diet. In this context, the FFL of sauropods might represent a vestigial trait, retained in a reduced version from the bipedal and predatory early sauropodomorphs.

Authors+Show Affiliations

Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straβe 10, 80333, Munich, Germany. m.bronzati@lrz.uni-muenchen.de. Department of Earth and Environmental Sciences and GeoBioCenter, Ludwig-Maximilians-Universität, Richard-Wagner-Straβe 10, 80333, Munich, Germany. m.bronzati@lrz.uni-muenchen.de.Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straβe 10, 80333, Munich, Germany. Department of Earth and Environmental Sciences and GeoBioCenter, Ludwig-Maximilians-Universität, Richard-Wagner-Straβe 10, 80333, Munich, Germany.Departamento de Geologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos 6627, 31270-901, Belo Horizonte, MG, Brazil.Labora tório de Paleontologia, FFCLRP, Universidade de São Paulo, Av. Bandeirantes 3900, 14040-901, Ribeirão Preto, SP, Brazil.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

28931837

Citation

Bronzati, Mario, et al. "Endocast of the Late Triassic (Carnian) Dinosaur Saturnalia Tupiniquim: Implications for the Evolution of Brain Tissue in Sauropodomorpha." Scientific Reports, vol. 7, no. 1, 2017, p. 11931.
Bronzati M, Rauhut OWM, Bittencourt JS, et al. Endocast of the Late Triassic (Carnian) dinosaur Saturnalia tupiniquim: implications for the evolution of brain tissue in Sauropodomorpha. Sci Rep. 2017;7(1):11931.
Bronzati, M., Rauhut, O. W. M., Bittencourt, J. S., & Langer, M. C. (2017). Endocast of the Late Triassic (Carnian) dinosaur Saturnalia tupiniquim: implications for the evolution of brain tissue in Sauropodomorpha. Scientific Reports, 7(1), 11931. https://doi.org/10.1038/s41598-017-11737-5
Bronzati M, et al. Endocast of the Late Triassic (Carnian) Dinosaur Saturnalia Tupiniquim: Implications for the Evolution of Brain Tissue in Sauropodomorpha. Sci Rep. 2017 09 20;7(1):11931. PubMed PMID: 28931837.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Endocast of the Late Triassic (Carnian) dinosaur Saturnalia tupiniquim: implications for the evolution of brain tissue in Sauropodomorpha. AU - Bronzati,Mario, AU - Rauhut,Oliver W M, AU - Bittencourt,Jonathas S, AU - Langer,Max C, Y1 - 2017/09/20/ PY - 2017/02/13/received PY - 2017/08/25/accepted PY - 2017/9/22/entrez PY - 2017/9/22/pubmed PY - 2019/6/30/medline SP - 11931 EP - 11931 JF - Scientific reports JO - Sci Rep VL - 7 IS - 1 N2 - The evolutionary history of dinosaurs might date back to the first stages of the Triassic (c. 250-240 Ma), but the oldest unequivocal records of the group come from Late Triassic (Carnian - c. 230 Ma) rocks of South America. Here, we present the first braincase endocast of a Carnian dinosaur, the sauropodomorph Saturnalia tupiniquim, and provide new data regarding the evolution of the floccular and parafloccular lobe of the cerebellum (FFL), which has been extensively discussed in the field of palaeoneurology. Previous studies proposed that the development of a permanent quadrupedal stance was one of the factors leading to the volume reduction of the FFL of sauropods. However, based on the new data for S. tupiniquim we identified a first moment of FFL volume reduction in non-sauropodan Sauropodomorpha, preceding the acquisition of a fully quadrupedal stance. Analysing variations in FFL volume alongside other morphological changes in the group, we suggest that this reduction is potentially related to the adoption of a more restricted herbivore diet. In this context, the FFL of sauropods might represent a vestigial trait, retained in a reduced version from the bipedal and predatory early sauropodomorphs. SN - 2045-2322 UR - https://www.unboundmedicine.com/medline/citation/28931837/Endocast_of_the_Late_Triassic__Carnian__dinosaur_Saturnalia_tupiniquim:_implications_for_the_evolution_of_brain_tissue_in_Sauropodomorpha_ L2 - https://doi.org/10.1038/s41598-017-11737-5 DB - PRIME DP - Unbound Medicine ER -