Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 16. 1993. (Budapest, 1993)
1874 Terebratula (Waldheimia) Bakonica n. sp. var. complanata - Böckh: p. 130, pl. 3, fig. 1. Material: Kőris-hegy (1), Páskom (3), Szesztra-hegy (10), Eperkés-hegy (1), Tűzköves-hegy (8). Dimensions (mm): Specimen M.93.12. (Text-fig. 13) length: 15.0, width: 13.8, thickness: 6.6. Description - External characters: Small shell, circular in outline. The anterior margin is straight at some species. \ The length is greater than the width, while the thickness is y one-third of the length. The angle between the lateral Text-fig. 13: Drawing of margins is about 82°. Lobothyris ? complanata, Biconvex form, the valves are equally convex. The Tűzköves-hegy maximum width is situated at half of the length, while the maximum convexity is at the posterior third. The beak is small and erect. There are two weak and short beak ridges on the pedicle valve. The lateral commissures and the anterior commissure are straight and sharp. Both valves are smooth. Internal characters (Text-fig. 14): No pedicle collar has been observed. There are no dental plates. The delthyrial cavity is circular in cross section. The hinge teeth and the sockets cannot been observed exactly. There is no median septum. The inner hinge plates are subhorizontal in cross section. The crural processes are not high and slightly arched. The transverse band is low and narrow. Remarks: L. ? complanata was first described as the subspecies of "Terebramla (Waldheimia)" Bakonica Böckh, 1874. The internal characters of my specimens refer to the genus Lobothyris but the subhorizontal hinge plates make the classification uncertain. Böckh's original type specimens are missing from the type material of Hungarian Geological Institute. Distribution: According to Aimeras (1964), "Waldheimia" bakonica is Sinemurian in age, however the specimens from the Bakony Mts. are probably Hettangian in age. The species was reported only from the Transdanubian Central Range. Lobothyris ? sospirolensis (Uhlig, 1879) (Plate II: Fig. 2; Text-figs. 15-16) 1879 Waldheimia sospirolensis n. sp. - Uhlig: p. 28, pi. 3, figs. 1-6. Material: Kőris-hegy (1), Kávás-hegy (4). Dimensions (mm): Specimen M.93.18. (Text-fig. 15) length: 16.3, width: 10.0, thickness: 10.0. Description - External characters: Small to medium sized shell, elliptical in outline but straight at the anterior margin. The angle between the lateral margins is about 55°. The length is much larger than the width, while the thickness and the width are equal. Text-fig. 15: Drawing of Biconvex form, the convexity of valves are equal. The .obothyns ? sospirolensis, max j mum ^idth is situated at the anterior third, the maxiKávás-hegy
