Les Pitymys de l’Italie centrale occidentale (Rodentia, Arvicolidae). Données craniométriques et dentaires

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Abstract
Data are given on teeth morphology and craniometry from .apprx. 650 Pitymys skulls found in barn owl pellets of some 30 different localities of the Emilia-Romagna. Toscana, Marche, Umbria, Lazio, Abruzzi e Molise and Campania provinces in mid-western Italy, Pitymys shows a noticeable geographic variability, mainly in the mid-western Latium, with features of a centric cline; thus, toward the middle of that region, M3 [upper moler 3] tend to prevail the typica variant, with the 2 field joint, and cranial dimensions tend to increase to 10% compared with more northern, southern and eastern regions. Only the presence of P. savii was karyologically proved in the middle of the same cline. Variability may be due to very complex geography of the Italian peninsula and to the present and historic discontinuity of biotopes of Pitymys, namely between mid-western Latium and its surroundings.

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