Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 73. (Budapest 1981)
Vörös, A.: A survey of the Rhaetian (Upper Triassic) Bivalvia from Borzavár (Bakony Mts., Hungary)
Description : The shell is of small size for the genus; slightly inflated, nearly equilateral. The outline is subcircular, the hinge margin is straight and attains less than the half of the total length. The auricles are subequal with subrounded outline. The shell surface is ornamented with fine, regular growth lines. Some of the internal casts show two shallow, radial depressions from the umbo to the anterior and posterior ends of the ventral margin and a third, running parallel with the ventral margin within a 2 mm distance. Remarks: E. hehlii is a very common, though often misinterpreted, species. STAESCHE (1926), in a very thorough discussion, cleared up the relationship between E. hehlii and the smooth Chlamys species of the same age. Following his principles, the forms figured by DUMORTIER, STOPPANI and BERTULETTI (in the above synonymy) must be regarded as Chlamys spp. on the basis of their byssal notches and inequilateral outlines. Distribution : Rhaetian of the "Préalpes", the Southern Alps and the Bakony Mts. (Hungary); Lower Jurassic of France, South Germany, Calabria, the Southern Alps and the Villány Mts. (Hungary). Entolium ? cf. amerinum SIRNA, 1968 (Plate II: 2) 1968: Entolium? amerinum SIRNA, Monti di Amelia, p. 771, pi. 53, fig. 8-10, pi. 54, fig. 1-3. 1972: Entolium? amerinum SIRNA, 1968 — ALASSINAZ. Revisione Pettinidi triassici, p. 283, pi. 37, fig. 4-5. Material: 3 internal casts with shell fragments. — Locality : Borzavár, Rhaetian yellow and grey limestones. Description : The shell is of small size for the genus; slightly inflated, nearly equilateral. The outline is subcircular; the height is greater than the length. The auricles are broken off. The outer surface of the shell is smooth. The internal cast shows that the inner surface of the shell is ornamented with evenly dispersed, small (0.1-0.5 mm) granules and, in the umbonal region, fine, concentric growth rings. Remarks : The diagnostic feature of this species is the granulated inner surface of the shell. This specific character is accepted here since the material from Borzavár is inadequate to decide whether these granules are original elements of the shell or secondary, perhaps diagenetic, outgrowths. From similar reason SIRNA (I.e.) assigned his species to the genus Entolium with query. If the granules prove to be original shell elements, this will be enough to establish a new genus. Distribution : Rhaetian of the Central Apennines and the Bakony Mts. (Hungary). Genus PLACUNOPSIS MORRIS et LYCETT, 1853 Placunopsis alpina (WINKLER, 1859) (Plate II: 3) *1859: Anomia alpina WINKLER, Schichten der Avicula. .., p. 5, pl. I, fig. la-c. 1859: Anomia Schaf hautI'i WINKLER. — Ibid., p. 5, pl. I, fig. 2a-b. 1861 : Placunopsis alpina. — MOORE, Avicula contorta Zone, p. 500., pl. XVI, fig. 4-5. 1863: Anomia Schafhäutli WINKLER. —STOPPANI, Couches à Avicula. .., p. 138, pi. 32, fig. 6-9. 71863: Anomia Favrii STOPP. — Ibid., p. 139, pl. 32, fig. 14-15. 1865: Anomia Schaf häutli WINKL. — Ibid., p. 209, pl. 36, fig. 14. 1865: Anomia Revonii STOPP. — Ibid., (pars), p. 209, pl. 36, fig. 11 (non fig. 12-13). 1866: Anomia Favrii, STOPP. —CAPELLINI, Infralias. Spezia, p. 75, pl. VI, fig. 14. 1917: Placunopsis ("Anomia" ) alpina WINKL. —GOETEL, Rhät, Stufe Tatra, p. 162, pl. 9, fig. 2. 1967: Placunopsis alpina (WINKLER, 1859) — KOCHANOVÁ, Rhaet-Hettang-Grenze, p. 69, pl. IV, fig. 5. V non 1964: Placunopsis alpina (WINKLER), 1859. — VÉGH, Rhät. Südl. Bakonygeb., p. 40, 78,. pl. III, fig. 16.
