Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 80. (Budapest 1988)

Pálfy, J.: Middle Triassic rhynchonellids from the Balaton Highland (Transdanubian Central Range, Hungary)

Fig. 1. Sketch map showing the Balaton Highland area located north of Lake Balaton, the three localities and the surface distribution of the Anisian formations. and collection was carried out by the Hungarian Geological Survey, providing one and a half thousand brachiopod specimens. In all the three localities the Anisian "Recoarotype" limestone yielded the brachiopod fauna. On the slope of the Horog Hill near the village of Köveskál loose blocks of lumashella-like crinoidal-brachiopodal limestone contained very densely packed usually fragmentary shells. On the Farkókő Hill near the village of Aszófő the recently excavated section clearly shows the crinoidal-brachiopodal limestone overlying the Lower Anisian Megyehegy Dolomite. Here this "Recoaro-type"limestone is dark-brown, bituminous, slightly silicified, containing intraclasts, and its thickness does not exceed 3.5 m. In the fossil assemblage the brachiopods are accompanied by bivalves and cephalopods. The occurrence of the index ammonite Balatonites balatonicus marks the stratigraphie position (Balatonicus Zone). The brachiopodal-crinoidal limestone is overlain by the thin-bedded "Reifling-type" limestone very rich in cephalopods (see VÖRÖS 1987). In the Forrás Hill near the village of Felsőörs the crinoidal-brachiopodal limestone is about 4 m thick. In the sequence it overlies a cherty, bituminous limestone resting directly upon the Megyehegy Dolomite. Higher up, the brownish, marly "Reifling-type" limestone represents the Illyrian (see SZABÓ et al. 1980). In the crinoidal-brachiopodal "Recoaro-type" limestone no index ammonite has been found, however, its stratigraphie position must be near to the Pelsonian/Illyrian boundary. SYSTEMATIC PALAEONTOLOGY Order RHYNCHONELLID A KUHN, 1949 Family Praecyclothyrididae MAKRIDIN, 1964 Subfamily Tetrarhynchiinae AGER, 1965