Výsledky projektu Implikace cenomanských a turonských amonitů české křídové pánve do mezinárodní biostratigrafické zonace

An unusual early Turonian ammonite fauna, comprising Fagesia peroni (Pervinquiere, 1907), Fagesia
catinus (Mantell, 1822) and Paramammites polymorphus (Pervinquiere, 1907), is recorded for the first time
from the southern margin of the Bohemian Cretaceous Basin (BCB) in central Europe. The occurrence of
these exotic ammonites also constitutes the northernmost record in the Mid-European seaway that links
the Boreal and Tethyan realms, because these taxa are missing from the western, eastern and northern
parts of the basin as well as from the Saxonian, Bavarian and northern European basins (except Fagesia
catinus from westernmost European parts). The stratigraphical distribution within the Fagesia catinus
Zone, newly documented here for the BCB, is also supported by records of the earliest Turonian inoceramid
Mytiloides puebloensis Walaszczyk and Cobban, 2000. The palaeobiogeographical distribution of
these ammonites marks a clear boundary in the BCB area and simultaneously documents a significant
Tethyan influence in the central European basin during the early Turonian. This migration pattern is
linked to the onset of the Turonian temperature rise and sea level highstand.