O. G. Dely szerk.: Vertebrata Hungarica 14. (Budapest, 1973)

Jánossy, D.: The boundary of the Plio-Pleistocene based on the Microvertebrates in North Hungary (Osztramos Locality 7) 101-112. o.

Vertebr. Hung. XIV. 1973. The Boundary of the Plio- Pleistocene based on the Microvertebrates in North Hungary (Osztramos Locality 7) JÁNOSSY, Dénes Hungarian Natural History Museum, Budapest ABSTRACT: The author gives a short preliminary report on the fauna of Osztramos, Locality 7, characterized by typical Upper Pliocene - Lowest Pleistocene microfaunistic elements (Episoriculus gibberodon, Petényiella cf. gracilis, Mimomys stehlini, Baranonmys lóczyi etc.) found together with the hitherto known oldest Lemmus-remains in Europe. He deals with the stratigraphical and climatical signification of the fossil material of the locality. The Hungarian microstratigraphic series may justly be called one of the typical successions chiefly of the Upper-Pliocene Lower Pleistocene in Europe. This special position of the Hungarian vertebrate fauna of this period was formerly based on the rich Micro-vertebrate Faunas of the Mountains Villány in South Hungary

. The first description of a Lowest Pleistocene microvertebrate fauna from these localities, with still useful, correct and uptodate diagnoses of small mammal species, originates from the nineteenth century, given by PETÉNYI (1864). The intense professional activity of KORMOS (1933 etc.) and chiefly of KRETZ

01 (1956, I962 etc.) concerning the investigation of small mammalian assemblages in Hungary during the last decades improved the Pliocene-Pleistocene boundary, based chiefly on the territory of the Mountains Villány. The only questionable point of the exemplary succession of the fissure-faunas of this area in South Hungary lies in the fact that this territory belongs to the Submediterranean phyto-zoogeographic belt (the socalled Submediterranean geoelement), so