The new early Sarmatian microvertebrate localities Kozárd (Hungary, Nógrád County) and Vârciorog (Romania, Bihor County) are of first importance for the understanding of faunal evolution, as well as the palaeoenvironment and palaeoclimate changes during the late middle Miocene in the Central Paratethys. Both localities are rich in Foraminifera and Mollusca. This allows to correlate both continental faunas to the Elphidium reginum foraminifera zone and the Mohrensternia mollusc zone (early Sarmatian s. str.; Serrevalian). Furthermore, Kozárd is the type section of the lithostratigraphical unit Kozárd Formation. The Cricetodontini are the dominant elements in both rodent faunas which also include, beside smaller cricetid rodents, glirids and sciurids. The large hamster species from Vârciorog is described as new species “Cricetodon” venczeli n. sp. The species from Kozárd is a more evolved form, which is very similar to “C.” klariankae from Felsőtárkány-Felnémet 2/3, and thus assigned herein “C.” cf. klariankae. We that these three taxa as belonging to an evolutionary lineage, which underlines their biostratigraphic importance.

早期的新喀尔巴阡山脉微脊椎动物地区Kozárd（匈牙利，诺格拉德县）和Vârciorog（罗马尼亚，Bihor县）对于了解动物区系演化以及中中新世中期中新世以后的古环境和古气候变化具有重要意义。这两个地方都盛产有孔虫和软体动物。这可以使两个大陆动物区系与有孔虫Elphidium reginum foraminifera区和Mohrensternia区相关软体动物带（Sarmatian s。str。早期； Serrevalian）。此外，科扎德是岩石地层学单位科扎德组的类型剖面。Cricetodontini是这两种啮齿动物的主要组成部分，除了较小的鳞齿啮齿动物外，还包括滑行和鞘状。Vârciorog的大型仓鼠物种被描述为新物种“ Cricetodon ” venczeli n。sp。来自Kozárd的物种是更进化的形式，与“ C ”非常相似。klariankae从上塔尔卡尼-Felnémet2/3，因此在此分配的“ C. ”比照 克拉里安凯（Klariankae）。我们认为这三个分类单元属于进化谱系，这突出了它们的生物地层学重要性。