Comparing the body mass variations in endemic insular species of the Genus Prolagus (Ochotonidae, Lagomorpha) in the pleistocene of Sardinia (Italy)
Moncunill Solé, Blanca (Institut Català de Paleontologia Miquel Crusafont)
Tuveri, C. (Soprintendenza Archeologia della Sardegna)
Arca, M. (Soprintendenza Archeologia della Sardegna)
Angelone, Chiara (Institut Català de Paleontologia Miquel Crusafont)

Fecha: 2016
Resumen: Prolagus figaro and P. sardus are part of an endemic insular anagenetic lineage that populated Sardinia since the earliest Late Pliocene to Holocene. BM of some populations of these two species was calculated using regression models. The best BM proxies for Prolagus are: femur length, zeugopod measurements and distal humerus diameter. The anagenetic lineage shows a BM increase of ca 20% from the populations of P. figaro (398-436 g) to P. sardus (504-525 g). The trend shown by the size of lower third premolar, even if not directly comparable with BM, is opposite (ca -30% at the transition P. figaro-P. sardus). Compared to P. cf. calpensis, a continental species of similar age, BM of P. figaro is ca +25%. The comparison with the insular endemic P. apricenicus evidenced differences in BM range and timespan required to attain it, due to the different size and palaeogeographical situation of the islands. Insular endemic Prolagus follow the small mammal pattern of Island Rule. Mein's (1983) biphasic model seems applicable to the evolution of P. figaro. A tachytelic phase followed by a bradytelic one seems to characterize also the appearance of P. sardus, at least for dental traits, a process probably triggered by important variations of abiotic and biotic traits of the environment, as indicated by the turnover that marks the onset of the Dragonara subcomplex. The prediction of life history traits and other biological attributes of Sardinian Prolagus using BM should be considered with caution due to the complexity of ecological selective regimes of Sardinia.
Nota: Número d'acord de subvenció MECD/AP2010-2393
Derechos: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Lengua: Anglès.
Documento: article ; recerca ; publishedVersion
Materia: Body mass ; Regression models ; Postcranial bones ; Island Rule ; Mediterranean islands ; Prolagus figaro ; P. sardus
Publicado en: Rivista Italiana di Paleontologia e Stratigrafia, Vol. 122, no. 1 (March 2016) , p. 25-36, ISSN 0035-6883



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