Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 90. (Budapest 1998)

Hír, J.: Cricetids (Rodentia, Mammalia) of the Early Pleistocene vertebrate fauna of Somssich-hegy 2 (Southern Hungary, Villány Mountains)

60 J. Hír The morphology of the Allocricetus bursae molars from Somssich-hegy 2 can be described with the percentage of the following elements. Ml M2 PAC+, PAST+ 0% ML+. PML+ 0% PAC+, PAST2% ML+, PML0% PAC-. PAST+ 6% ML-, PML+ 0% PAC-, PAST92% ML-, PML100% ml ni2 m3 PAC+ 0% ALC+. ML+ 13% ALC+, ML+ 3% PAC100% ALC+, ML75% ALC+, ML12% ALC-, ML+ 33% ALC-, ML+ 12% ALC-, ML47% ALC-, ML73% PAC = pre-anterocone cingulum (enamel conelet on the oral surface of the molar) PAST = paras ty le ML = mesolophe, mesolophid PML = posterior metalophulc ALC = antero-lingual cingulum Compared to the frequency of these additional morphological elements in other Hungarian Allocricetus materials, the population of Somssich-hegy 2 is characterized by strongly reduced morphology. This feature is a common character of the Cricetulus materials (HÍR 1994c/). Allocricetus bursae is a very common species of the Hungarian Pleistocene vertebrate faunas. Its stratigraphical range is from the Betfia phase to the Varbó phase (Eemian). The morphology and the dimensions of the different populations are relatively well known, but the differences among them are not as characteristic as in Western Europe, where the description of different chrono-subspecies was possible (CHALINE 1972, 1975). The evolution of the Allocricetus genus in Western and in Central Europe seems to be different. Allocricetus ehiki SCHAUB, 1930 The presence of this species is easy to verify on the basis of the dimensions (Figs 2-7). The larger Allocricetus species was flourishing in the Late Villányian (MN 17) faunas of Villány 3 and Osztramos 3. (HÍR 1993). During the Biharian it became rare, but it was found in several Hungarian faunas: Hajnóczy Cave (HÍR 1992), Tarkő (HÍR 1989) and Villány 8 (HÍR, unpublished). The LAD of the A. ehiki was detected in the 8th layer of the Tarkő sequence. The dominancy curve of the Allocricetus species is more or less similar to the curve of A podemus (Fig. 33). For this reason we can presume a relative humidity requirement