Abstract: More than three hundred ammonoid specimens have been collected from a few layers of red limestones of Hallstatt
(Schreyeralm) or Han Bulog type, exposed on the top of the Szár-hegy (Rudabánya Mts, North Hungary). The fauna is dominated by Ptychitidae
(over 90%), but a few ceratitid species of biostratigraphical importance (Lardaroceras pseudohungaricum, L. krystyni, Asseretoceras camunum, Megaceratites
subnodosus, Kellnerites bispinosus) have also been identified. These prove the Camunum + Pseudohungaricum subzones of the Upper Anisian
Trinodosus Zone. The very high proportion of the smooth, sphaeroconic ammonoid morphotypes indicates pelagic and bathyal (at least 500 m
deep) environment. Most of the 17 ammonoid species of the Szár-hegy fauna occur in the Dinarides (15 species), while in the faunas of the
geographically closer Southern Alps and Balaton Higland the number of co-occurring species is 8 and 9, respectively. Another important indicator
is the occurrence of the genera Sturia, Gymnites and Procladiscites in the Szár-hegy fauna, what clearly shows the principal palaeobiogeographic
affinity of the Szár-hegy fauna towards the Dinaric region.Keywords:
Author(s): Vörös, A.
Title: Late Anisian Ammonoidea from Szár-hegy (Rudabánya Mts); a Dinaric-type fauna from North Hungary
Middle Triassic, taxonomy, Hungary, Ammonoidea, stratigraphy, palaeobiogeographySubject:
palaeontologyJournal: Fragmenta Palaeontologica HungaricaJournal abbreviation: Fragm. Palaeont. Hung.ISSN: 1586-930XPublisher: Hungarian Natural History Museum, BudapestEditor(s): Szabó, J.
& Dulai, A.