Abstract
ABSTRACT In the present work, a geometric morphologic study was carried out to compare the lower first molars of species belonging to the genera Allophaiomys, Terricola and Microtus and to explore the morphological variation within species. The examined teeth were recovered from nine Early and Middle Pleistocene sites, but recent material was also used in the study. We analysed the teeth of 733 Allophaiomys spp. 855 Terricola arvalidens, 339 Terricola hintoni and 625 recent Terricola subterraneus. Morphology and linear morphometric data of teeth were compared using canonical variate analysis and landmark analysis. The resulting morphological series reflect the phylogenetic relationships between species. We also tested the morphological changes observed in the fossil material with the separation times calculated from recent phylogenetic studies. Our results suggest that most phylogenetic changes can be traced by morphological analysis of this tooth. While the emergence of species belonging to the genera Terricola and Microtus is broadly consistent with the phylogenetic data, early colonisation of the genus Agricola was not morphologically detectable. The study of the genus Allophaiomys has revealed a palaeoecological difference between northern and southern Hungary during the mid-Pleistocene transition. Southern Hungary was covered with steppe, while northern Hungary was forested at that time.
Published Version
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