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.

faunas of Southern Poland . During the last years I had occasion to elaborate the bird faunas from Weze and Rebielice, decisive from this point of view. It appeared that the fauna of stationary birds, chiefly of Galliforms, is also very important from a climatic aspect. The Tetrao-group

, which appeared - according to our present knowledge - for the first time at Weze in Europe with an extinct form standing between the Black grouse and the Capercaillie (Tetrao and Lyrurus

) - present at locality 7, Osztramos too, - indicates a cool-moderate climate. After all aupears the first unambiguously arctic element, the ptarmigan (Lagopus lagopus) together with Lemmus,in the geologically seemingly a little younger fauna of Rebielice. The paleoecological interpretation of the fact that in Rebielice Lagopus and Lemmu

s occur together with actually southern forms, possibly regarded as tertiary relicts, remains an open question. Such are, among the reptiles, some eminently Mediterranean lizards and snakes: the Scheltopusik

, Ophisauru

s

; the Green Whip Snake, Coluber viridlf lavu

s ; the Sand Natter, Eryx jaculu

s etc. Among birds, the predominance of the members of the genus Prancolinus, in recent times with a distinctly Ethiopie-Oriental distribution, is characteristic (at locality 7, Osztramos a dozen of remains present too). Returning to the first indicators of a colder climate, we may spontaneously put the Pliocene-Pleistocene boundary, according to the conception of C HAL IKE and MICIIAUX (1972) in Prance at the time space represented by the fauna of locality 7, Osztramos. According to the recommendations of the international Geological Congress (London, 1948), we "... would place the boundary (of Plio-Pleistocene)at the horizon of the first indication of climatic deterioration ... in the succesion ..." Independently of the fact that the correlation of marine and terrestrial sediments of the Pliocene-Pleistocene boundary in Northern Italy failed in the sense of the above mentioned recommendation, the new Hungarian-Polish data on the first indicators of a colder climate may have a reality. Remains of Le

m-