Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 19. 2001. (Budapest, 2001)

Campanian (Late Cretaceous) cephalopods from Sümeg (Transdanubian Central Range, Hungary) by István FŐZY Abstract — A Campanian ammonite assemblage, including Hypophylloceras sp., Pachydiscus cf. leiyi DE GROSSOUVRE, Pachydiscus cf. precolligatus COLLIGNON and Menabites (Delawareila) suemegensis sp. «., and a single specimen of Angulithes cf. westphalicus (SCHLUTTER) of the same age, are described and figured for the first time from Hungary (Sümeg, Transdanubian Central Range). Keywords

— Upper Cretaceous, Ammonoids, Naudloid, biostradgraphy, Hungary FŐZY, I. (2001): Campanian (Late Cretaceous) cephalopods from Sümeg (Transdanubian Central Range, Hungary). — Fragmenta Palaeontologica Hungarica, 19: 25-37. Introduction In Hungary, the areal extent of the Upper Cretaceous sediments is limited. A rather complex sedimentary

7 cycle (Figure 1) is recorded only in the southwestern part of the Transdanubian Central Range (Bakony Unit, KÁZMÉR 1986), in the vicinity of Sümeg. There the formations are often rich in megafossils, especially gastropods, rudists and thin-shelled bivalves (Inoceramus) in the Ajka Coal, Ugod Limestone and Jákó Marl, respectively. Ammonites are very rare. HAAS et al. (1984) gave a general overview on the geological setting of the region. The authors listed Scaphites sp. and Pachydiscus neubergicus SCHLOTHEIM (the latter one is misidentified), collected by J. NOSZKY from the Polány Marl near Sümeg. Figure 1 — Schematic sketch for the Upper Cretaceous formations of the Transdanubian Central Range. (After CSÁSZÁR G. 1996). Recent palaeontological data suggest that the age of the Polányi Marl is, at least partly, Campanian. Another important Late Cretaceous ammonite, Placenticeras polyopsis (DUJARDIN) was determined by SUMMESBERGER and figured by PARTÉNYI (1986). This Upper Santonian fossil was collected from the Jákó Marl, which underlies the Polány Marl. Figure 2 — Locality map of Sümeg (after HAAS et al, 1985). The ammonites were collected from one of the old quarries somewhere in the region called "Haraszt", in the vicinity of the town. Asterisk shows the most probable source of the ammonites, described in the text. Because of the scarce occurrence of Late Cretaceous ammonites, the fossil assemblage described below is of special interest. The 18 specimens were discovered in the collection of the Palaeontological Department of the Hungarian Natural History Museum. According to the labels and the inventory data, all the ammonites were collected by L. KOCSIS, and the fossils were bought by the Museum in 1976. The locality (Figure 2) is indicated as: "village quarry, north of Sümeg" ("Sümegtől északra, a községi kőbányából"), but no details about the exact succession of the findings are available. It is unknown, whether the cephalopods were found in the same bed, or in the same package of beds. Unfortunately, in the vicinity of Sümeg, there are numerous small, old quarries, so it is not clear, where exactiy the ammonites