Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 89. (Budapest 1997)

Hír, J.: Cricetus runtonensis solymarensis ssp. n. (Mammalia, Rodentia) from the Late Middle Pleistocene fauna of Solymár

The aim of this paper is to give the accurate analysis of the fossil hamster material from Solymár, Ördög-lyuk. MATERIAL AND METHODS The following hamster material is housed in the Paleontological Collection of the Hungarian Natural History Museum from Solymár. 9 viscerocrania, 15 maxillae with complete toothrows, 18 maxillae with incomplete toothrows, 48 mandibulae with complete toothrows, 40 mandibulae with incomplete toothrows. The dental measurements were taken using the ocularmicrometer of a stereomicroscope to an accuracy of 0.01 mm. The following dimensions were measured (Fig. 1): L M1-M3 - length of the upper row of molars; L ml-m3 - length of the lower row of molars; L - length of tooth crown; Wa - anterior width of the toothcrown. In Ml molars it was measured across the anterocone, in ml molars it was measured across the anteroconid. In M2, M3 molars it is the width across the protocone-paracone. In m2, m3 molars it is the width across the protoconid-paraconid. Wp - posterior width of the toothcrown. In Ml, M2 molars it was measured across the hypocone-metacone, or across the hypoconid-metaconid in ml. m2 molars. This measurement was not taken in M3, m3 molars. During the statistic elaboration of the data the next parameters were computed: n - sample size; min. - the minimal measurement; max. - the maximal measurement; X. arithmetic mean; Med. - median; SD - standard deviation; CV - coefficient of variation; K - 95% confident interval of the arithmetic mean(+ -); V - 100 R/M. In which R is the difference between max.and min., and M is the midpoint between max. and min. (FREUDENTHAL & CUENCA BESCOS 1984). The results are given in the Tables 1-8. The statistic morphological investigation is based on the nomenclature of MEIN & FREUDENTHAL (1971«, b). The creation of the different morphotypes is demonstrated on the Figs 8, 9, 10, 12-17. The numerical data of the morphotypes are given in Tables 9-14. For comparison I quote the metrical data of the Pleistocene Cricetus major WOLDRICH, 1880 and Recent Cricetus cricetus (LINNAEUS, 1758) from Germany after FAHLBUSCH (1976). The data of the Pleistocene Cricetus runtonensis NEWTON, 1909 and Recent C. cricetus from Poland are after PRADEL (1985, 1988). I quote as well the results of my previous investigations (HÍR 1996, 1997,) on the Recent C. cricetus from Hungary and Early Pleistocene Cricetus praeglacialis SCHAUB, 1930 from Villány 8 (V8) and on C. runtonensis from Somssich-hegy 2 (SS2). SYSTEMATIC DESCRIPTION Order: Rodcntia BOWDICH, 1821 Family: Cricetidae ROCHEBRUNE, 1883 Subfamily: Cricetinae MURRAY, 1866 Genus: Cricetus LESKE, 1779 Species: Cricetus runtonensis NEWTON, 1909