First functional morphology comparison between two Miocene cricetid mandibles

1. Carro-Rodríguez, Patricia María ¹
2. López-Guerrero, Paloma ²
3. Prieto, Jérôme ³
4. Álvarez-Sierra, María Ángeles
5. Peláez-Campomanes, Pablo ⁴

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DOI: 10.7203/SJP.35.2.18480 DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Spanish journal of palaeontology

Resumen

Geometric morphometric allows characterizing complex morphologies in order to quantify the geometry of the structure and facilitate comparisons. It allows performing methods analysing differentiation pattern based on variance, such as the Principal Component Analysis (PCA). For that reason, it has been chosen as the method to analyse the mandibles of two extinct species of cricetids rodents: Cricetodon aff. aureus and Megacricetodon minor from the MN6, middle Miocene from Goldberg and Steinberg (Germany). We performed a digitisation of 18 landmarks that resumes the most relevant characteristics of these mandibles. We also performed a measure of the mechanical advantage and potential of the mandibles. In that way, we have been able to quantify notorious morphological differences on the angular and condylar processes and the lower masseter insertion and establish significant differences among the biomechanical behaviour of the mandibles. Later, we can relate the morphological and biomechanical information with speed and force biting.

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Información de financiación

We are very grateful to Sociedad Española de Paleontología for giving us the possibility to visit the Bayerische Staatssammlung für Paläontologie und Geologie to study the material thanks to the AJISEP grants 2018. Also, we are very grateful to Gertrud Rössner (BSPG) for access to the collections of Goldberg and Steinberg. Furthermore, we greatly appreciate Sergio Vargas (BSPG) for their help during the stay in Munich. We thank the reviewers J. Agustí and O. Maridet for their critical comments and contributions, which greatly improved the manuscript. The labour of the Editor Gonzalo Jiménez Moreno is greatly appreciated. This is a contribution of the Research Group Team 910607 on Evolution of Cenozoic Mammals and Continental Palaeoenvironments of the Complutense University of Madrid. This study was also supported by the Spanish Economy and Competitiveness Ministry research project PGC2018 094955-A-100 and PGC2018-094122-B-100.

Financiadores

• • PGC2018-094122-B-100

Fuente de los datos: Dialnet