Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 15. 1992. (Budapest, 1992)

Gryphaea gigantea J. de C. SOWERBY, 1823 Pl. I, Figs. 1-2, Pl. II, Fig. 2. This is the most frequent species of the recently collected material. It was already recorded from the Harsány-hegy by Vörös (1971). More than 25 specimens, mainly articulated but fragmentary shells were found. The length of the largest specimen is 132 mm. Some left valves with unbroken dorsal region show well defined posterior flange (P1.II, Fig.2.). As Hallam (1982) pointed out, a phyletic increase of maximum size can be observed among successive Gryphaea gigantea faunas of Europe from the early Pliensbachian appearance of the species until the end of the age. Specimens exceeding 110 mm in lenght are known only from the Late Pliensbachian. It must be mentioned, however, that specimens larger than postulated by Hallam (1982) were recorded by Arnaud and Monleau (1979) from the Early Pliensbachian of Provence. The presence of a well developed posterior flange, however, seems to be indeed characteristic of the Domerian representatives of G. gigantea (see e.g. Hallam 1968, fig. 52., Shopov 1974, pl. Ill, fig. 1. and Tietze 1872, pl. VI, fig. 1.). This indicates the Late Pliensbachian age of the rocks exposed on the Harsányhegy. Entolium (Entoluim) cf. lunare (ROEMER, 1839) Eight very poorly preserved specimens were collected. As the careful revision by Johnson (1984) suggests, all European pre-Tbarcian Jurassic representatives of the genus Entolium can be assigned to E. lunare. Measurements of the newly found shells as well as those of the specimens described by Vörös (1971) from Villány as Entolium cf. hehlii (D'ORBIGNY 1850) are well within the range of E. lunare. Its distinctive feature, a small byssal notch in the juvenile, cannot be observed, however. Pseudopecten (Pseudopecten) equivalvis (J SOWERBY, 1816) Pl. II, Fig. 4. Beside the abundance of Gryphaea gigantea, the presence of large specimens of Pseudopecten (Pseudopecten) equivalvis is the most striking feature of the Harsány-hegy fauna. 14 incomplete valves were found. The height of the largest measurable shell exceeds 120 mm. This specimen bears 23 rounded plicae. As shown by Johnson (1984), phyletic size increase is a marked trend in P. (P.) equivalvis. The largest shells, similar in size to the specimens found on the Harsány-hegy, were recorded from condensed Upper Pliensbachian sequences suggesting a similar age for the Harsány-hegy fauna. Chlamys (Aequipecten ?) cf. prisca (SCHLOTHEIM, 1820), now regarded as a synonym of P. (P.) equivalvis, was described by Vörös (1971) from the basal Pliensbachian of Villány. Apart from the occurrences listed by Johnson (1984) large specimens were figured by Rzehak (1904) from the Upper Pliensbachian of Freistadtl, Moravia and by Jekelius (1915) from the Pliensbachian of the Brasov Mts., Rumania.