Toarcian, Aalenian and Early Bajocian (Jurassic) ammonite faunas and biostratigraphy in the Pieniny Klippen Belt and the Tatra Mts, West Carpathians

The ammonite faunas here described were derived from the Toarcian (Lower Jurassic) and Lower Bajocian (Middle Jurassic) strata of the Pieniny Klippen Belt and the Lower Subtatric Succession, Polish Tatra Mts (West Carpathians). The ammonites belong to the families: Phyllo- ceratidae, Lytoceratidae, Hildoceratidae, Graphoceratidae, Hammatoceratidae, Sonniniidae, Otoiti- dae and Stephanoceratidae. The associated bivalve faunule is represented by the families Inocera- midae and ?Posidoniidae. Stratigraphic evaluation of the ammonite assemblages helped to redefine age ranges of some lithostratigraphic units in the Pieniny Klippen Belt and the Lower Subtatric Succession, Tatra Mts.