info:eu-repo/semantics/article
The forelimb of †cyonasua sp. (Procyonidae, Carnivora): Ecomorphological interpretation in the context of carnivorans
Fecha
2017-02Registro en:
Tarquini, Juliana; Toledo, Néstor; Morgan, Cecilia Clara; Soibelzon, Leopoldo Héctor; The forelimb of †cyonasua sp. (Procyonidae, Carnivora): Ecomorphological interpretation in the context of carnivorans; Royal Society of Edinburgh; Earth and Environmental Science Transactions of the Royal Society of Edinburgh; 106; 4; 2-2017; 325-335
1755-6910
CONICET Digital
CONICET
Autor
Tarquini, Juliana
Toledo, Néstor
Morgan, Cecilia Clara
Soibelzon, Leopoldo Héctor
Resumen
The procyonid †Cyonasua is endemic to South America and recorded from the Late Miocene to the Early Pleistocene. This paper studies the forelimb of †Cyonasua sp. (late Pliocene of Miramar, Argentina), using an ecomorphological approach to infer morphological adaptations linked to substrate preference and locomotory mode, as well as to grasping and digging ability. Twenty linear measurements of forelimb and pectoral girdle were taken from †Cyonasua sp. and a sample of 87 specimens of extant carnivoran families (Procyonidae, Mustelidae, Ursidae, Viverridae, Canidae and Felidae). Raw values were transformed to minimise the effect of size. Morphological variation was explored by principal component analysis (PCA); substrate preference and locomotory mode were further analysed by multivariate analysis of variance (MAV) and discriminant analysis (DA); grasping and digging ability were analysed by DA. In the PCA morphospace, †Cyonasua sp. occupied a unique position, close to extant procyonids. DA classified it as non-specialised digger with poor grasping ability. The results lead to the interpretation of †Cyonasua sp. as having a moderately stabilised elbow joint with poor pronation-supination, although some climbing skills cannot be ruled out. Thus, †Cyonasua sp. could have had generalised habits, in agreement with reconstructed palaeoenvironmental conditions.