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Abstract Late Miocene continental deposits overlying the Khersonian marine sediments near the city of Maikop bordering the Belaya River (North Caucasus) yielded a diverse biotic record including palynology, ostracods, fresh-water and terrestrial molluscs, fishes, amphibians and reptiles, birds, and mammals. The obtained data indicate predominantly wooded landscapes along the banks of a large fresh-water estuarine or lagoonal basin with occasional connection with the sea. The basin existed in a warm temperate to subtropical climate with a high humidity and an estimated mean annual precipitation above 800 mm. The mammalian assemblage with Hipparion spp., Alilepus sp., Paraglirulus schultzi, Eozapus intermedius, Parapodemus lugdunensis, Collimys caucasicus sp. nov., Neocricetodon cf. progressus, etc. is referable to the early Turolian, MN 11. The data regarding composition and stage of evolution of the small mammal content combined with mostly normal polarity of the fossiliferous deposits, and the age estimates of the upper Khersonian boundary as between 8.6 and 7.9 Ma indicate a plausible correlation with Chron C4n and an age range between 8.1–7.6 Ma.

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7he Bathonian ostracod fauna from Central Poland (Cz~stochowa region) has been restudied from nearly all ammonite zones. Forty nine well preserved, autochthonous species could be documented; some further, presumably new, taxa were kept in open nomenclature. According to the ostracod fauna, the European palaeobasin was subdivided during the Bathonian into two palaeobiogeographical provinces. According to ammonite data this subdivision existed only in Callovian time. We suggest a sublatitudinal link between the western and eastern bioprovinces that was present during the Bajocian, became restricted during the Bathonian and reopened during the early Callovian transgression.

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