Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 15. 1992. (Budapest, 1992)
Bakonyithyris sp. (Pl. VI, Fig. 4; Text-fig. 41) O Material: 1 complete and 1 incomplete specimens. Dimensions (mm): Specimens M.91.35. (Text-fig. 41a) and M.91.36. (Text-fig. 41b) length: 14.7,12.1; width: 14.0,12.0; thickness: 8.3,6.6. Description - External characters: Mediumsized shell, subpentagonal in outline. The antero-lateral corners are rounded. The angle between the lateral margins is about 85°. The width is nearly equal to the length while the thickness is hardly greater than half of the length. Biconvex form, the pedicle valve is more convex than the brachial one. The maximum width and the maximum convexity are situated a ^ at half of the length. The beak is small and erect. There are two strong beak ridges on the pedicle valve, running to half of the length. The planareas are narrow and slightly concave. The lateral commissures run in the middle of planareas. They are slightly arched and slightly rise f-Cf^ from the planarea. The anterior commissure is ^ZZS sulcate. The sulci of the two specimens differ b ) from one another. The sulcus of the larger specimen is not too deep but wide and it develops Text-fig. 41 - Drawing of gradually from the half of the length on the Bakonyithyris sp. brachial valve and corresponds to a weak fold on the pedicle valve. The sulcus of the smaller specimen is narrower and deeper and it develops relatively suddenly at half of the length on the brachial valve, corresponding to a stronger fold on the pedicle valve. Internal characters: There were no adequate specimens available for serial sectioning due to the paucity of the material. Remarks: The small specimen number and the rather poor preservation render a more precise identification impossible. The sulcus of our specimens is so different that they may represent two different species of Bakonyithyris. Distribution: According to Vörös (1983), Bakonyithyris is Sinemurian and Pliensbachian in age in the Mediterranean region (Sicily, Appennines, Southern Alps, Northern Calcareous Alps, Western Carpathians, Hungary, and Crimea). Terebratulida gen. and sp. indet. (Pl. VI, Fig. 5; Text-fig. 42) Material: 1 poorly preserved specimen. Dimensions (mm): Specimen M.91.03. (Text-fig. 42) length: 17.5, width: 17.0, thickness: 9.1.
