Fragmenta Palaeontologica Hungarica

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Author(s): Kovács, Z.
Title: Lower Toarcian Ammonitida fauna and biostratigraphy of the Gerecse Mountains (Hungary)
Year: 2011
Volume: 29
Pages: 1-48.

Abstract: Stratigraphical and taxonomical problems of the Lower Toarcian (Jurassic) ammonite assemblages of the Gerecse Mts (NE Transdanubian Range, Hungary) are discussed. The Submediterranean ammonite biostratigraphy with Dactylioceras tenuicostatum and Harpoceras serpentinum Zones is established for the studied successions. A simplified stratigraphical scheme with two subzones (Harpoceras serpentinum, Harpoceras falciferum) and three biohorizons (Hildaites striatus, Harpoceras pseudoserpentinum, Orthildaites douvillei) are recognized for the Harpoceras serpentinum Zone. Lower–Middle Toarcian Ammonitida fauna is documented: species belonging to genera Phylloceras, Calliphylloceras, Lytoceras, Dactylioceras, Mesodactylites, Nodicoeloceras, Catacoeloceras, Fontanelliceras, Polyplectus, Harpoceras, Ovaticeras, Hildaites, Orthildaites, Cingolites are described and figured, a new species, Orthildaites becaudi n. sp. is introduced.
Keywords: Toarcian, stratigraphy, Jurassic, Hungary, Gerecse Mts, Ammonitida
Subject: palaeontology

Journal: Fragmenta Palaeontologica Hungarica
Journal abbreviation: Fragm. Palaeont. Hung.
ISSN: 1586-930X
Publisher: Hungarian Natural History Museum, Budapest
Editor(s): Szabó, J., Dulai, A. & Fuisz, T. I.