Skip to Main content Skip to Navigation
Journal articles

Mandible morphology, dental microwear, and diet of the extinct giant rats Canariomys (Rodentia: Murinae) of the Canary Islands (Spain).

Abstract : An ecomorphological approach of mandible shape through Fourier analyses combined with a paleodietary analysis of dental microwear patterns is used to reconstruct the diet of the extinct endemic Canariomys bravoi Crusafont, Pairó & Petter, 1964 and Canariomys tamarani López-Martínez & López-Jurado, 1987. These two large rodents, respectively, lived on Tenerife and Gran Canaria, the central islands of the Canarian Archipelago. Mandible shape and dental microwear respectively inform us on the volume of vegetal matter and on the presence of grass in the diet. Both Canariomys, which are of similar size, possess relatively similar mandible outlines and microwear patterns. For each species, a diet based on plant materials except grass is the most likely. Such results chime with the similar environments offered by the islands in which the species lived. On the contrary, molar morphology suggests different feeding habits of the two Canariomys. Thus, this suggests a case of mosaic evolution between teeth and mandibles, as well as the likely sensitivity of mandible shape to a combination of ecological and allometric factors. These new data obtained from the fossil record underline the propensity of island endemic mammals to yield surprising examples of phenotypic evolution.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-00511265
Contributor : Rémi Laffont <>
Submitted on : Tuesday, August 24, 2010 - 1:40:11 PM
Last modification on : Tuesday, September 21, 2021 - 3:12:02 PM

Links full text

Identifiers

Citation

Cyril Firmat, Helder Gomes Rodrigues, Sabrina Renaud, Julien Claude, Rainer Hutterer, et al.. Mandible morphology, dental microwear, and diet of the extinct giant rats Canariomys (Rodentia: Murinae) of the Canary Islands (Spain).. Biological Journal of the Linnean Society, Linnean Society of London, 2010, 101 (1), pp.28-40. ⟨10.1111/j.1095-8312.2010.01488.x⟩. ⟨hal-00511265⟩

Share

Metrics

Record views

653