Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/42455
Título: When cotton rats grasp like pandas
Autores/as: Abella, Juan
Ruiz-Sánchez, Francisco J.
Valenciano, Alberto
Hontecillas, Daniel
Pérez-Ramos, Alejandro
Vera, Douglas
Santana-Cabrera, Jonathan A. 
Cornejo, María H.
Montoya, Plinio
Morales, Jorge
Clasificación UNESCO: 2416 Paleontología
Palabras clave: Cricetidae
Ecuador
False thumb
Santa Elena
Sigmodon
Fecha de publicación: 2016
Publicación seriada: Journal of Mammalian Evolution 
Resumen: The panda’s false thumb is an iconic structure, described as one of the most shocking cases of anatomical convergence, and has been studied in many essays about evolution. However, in a recent paper in which we evaluated this feature within the Carnivora, we concluded that the developed radial sesamoid could be taken as a plesiomorphic character for at least the Arctoidea, rather than an anatomical convergence of the pandas (both red and giant). Following this argument, in this research we describe the action of a radial sesamoid as a real false thumb for the first time outside the mammalian carnivorans. The cricetid Sigmodon peruanus shows a very similar radial sesamoid compared to that of the giant panda (Ailuropoda melanoleuca) but somehow relatively even more developed, compared to the other bones of the manus than in the latter, showing that the use of this structure as a opposable pincer is much more expanded in mammals than thought previously.
URI: http://hdl.handle.net/10553/42455
ISSN: 1064-7554
DOI: 10.1007/s10914-015-9314-9
Fuente: Journal of Mammalian Evolution [ISSN 1064-7554], v. 23 (3), p. 309-317
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