Dental Shape Variation and Phylogenetic Signal in the Rattini Tribe Species of Mainland Southeast Asia - Université de Montpellier Accéder directement au contenu
Article Dans Une Revue Journal of Mammalian Evolution Année : 2019

Dental Shape Variation and Phylogenetic Signal in the Rattini Tribe Species of Mainland Southeast Asia

Résumé

The Rattini tribe comprises some of the most specious genera in the mammalian kingdom. Many of these species are also highly morphologically conserved. As a result, identifying Rattini tribe animals, particularly those of the Rattus genus, to species level is extremely difficult. Problems with identification of conservative morphologies, particularly of the skeleton, have led to difficulties in understanding the fossil remains and as a result the systematics of this group. Here, we apply geometric morphometrics to the first lower molar of 14 species of the Rattini tribe. We find that the morphological data present a strong phylogenetic signal. However, within Rattus, this signal is rather complex and possibly hints at rapid evolutionary shape and size changes. In modern species, it is possible to identify specimens to species level with a good degree of confidence. We find that using both size and shape together affords further confidence with identification. However, we caution against the over-reliance on size in environments with unknown species composition and climate, particularly in archaeological contexts. This approach should prove to be a useful tool for identifying fossil and sub-fossil remains, particularly where biomolecular markers are absent in circumstances of poor preservation.
Fichier principal
Vignette du fichier
Beaman-JME-2019_1.pdf (623.57 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01920127 , version 1 (26-05-2020)

Licence

Paternité

Identifiants

Citer

A. Hulme-Beaman, Julien Claude, Y. Chaval, A. Evin, S. Morand, et al.. Dental Shape Variation and Phylogenetic Signal in the Rattini Tribe Species of Mainland Southeast Asia. Journal of Mammalian Evolution, 2019, 26 (3), pp.435-446. ⟨10.1007/s10914-017-9423-8⟩. ⟨hal-01920127⟩
88 Consultations
156 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More