congresos y reuniones científicas
Total-evidence phylogeny of giant chinchilloids (Rodentia, Caviomorpha)
BOIVIN, MYRIAM E.; ANTOINE, PIERRE O.; CONDAMINE, FABIEN L.; FABRE, PIERRE-HENRI; MARIVAUX, LAURENT; ALVAREZ, ALICIA
Jornada; Young Systematists' Forum; 2020
The Systematics Association
Although not being a species-rich taxonomic group today, the Chinchilloidea present an astonishing past diversity including the largest rodents of all times. We studied a new chinchilloid skull from the Miocene of Tucumán, Argentina. Through a comprehensive matrix including 473 cranio-dental and 11,211 molecular characters for 54 taxa, a total-evidence phylogenetic analysis of the chinchilloids was performed to unveil the relationships of their giant representatives and the phylogenetic position of this new material from Tucumán. We used both maximumparsimony and probabilistic approaches, and additional analyses were realized on the morphological characters solely. Our Bayesian inferences support the creation of a new extinct family, the Tetrastylidae, with the taxon from Tucumán being a representative of the family. Our analyses further provide different phylogenetic relationships for the Tetrastylidae and Neoepiblemidae (also extinct), either close to the Dinomyidae or to the Chinchillidae.