Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 75. (Budapest 1983)

Vörös, A.: Some new genera of Brachiopoda from the Mediterranean Jurassic

margin forms an almost complete semicircle. The valves are equally convex but the convexity is very variable; the holotype (second in the above table) is much flatter than the average. The beak is erect but the most delicate parts are broken so the characters of the pedicle opening and the delthyrium are not known. The beak ridges are long running to the anterolateral extremities; they are sharp on the brachial valve and blunt on the pedicle valve. The planareas are very deep. The lateral commissures are gently sinuous; they run on the deepest line of the planareas but at the anterolateral extremities they converge to the beak ridges of the brachial valve. After this, the first sharp deflection of the anterior commissure points invariably to the ventral direction. The amplitude of the deflections increases towards the centre. The posterior area of the shells is smooth; the costae develop at about the mid-length. They are ill-defined and low at first but become sharp and very strong close to the anterior margin; their number varies between 5 and 7 on the pedicle valve. Internal characters: These were not studied by serial sectioning for lack of suitable material. (The well-preserved, nearly complete specimens are all filled with sparry calcite and this matrix, according to the author's experience, makes the recognition of delicate internal structures impossible.) Nevertheless, considering the very close external similarity between L. kondai and L. palmaeformis one can suppose that their internal features are also similar i.e. typical for the genus. Remarks : BÖSE & SCHLOSSER (l.c) figured a specimen from the Southern Alps (La Stuva, Cortina d'Ampezzo) showing the very characteristic feature of L. kondai i.e. that the ribs appear only at about the mid-length of the shell. There are serious doubts, however, about their identity: (1) According to HAAS (1912, p. 234), the posterior smooth area of the above specimen is due to poor preservation (i.e. abrasion); (2) the specimen in question has 9 ribs while this number never exceeds 7 in L. kondai. L. palmaeformis (HAAS) and L. deangelisi (PRINCIPI) stand near to L. kondai but both have marked costation at the umbonal region. Further differences: L. palmaeformis has a greater number of costae (6-15); L. deangelisi does not show so characteristic fan-shaped outline (i.e. its anterolateral extremities are rounded). Distribution: L. kondai seems to be confined to the upper part of the Carixian in the Bakony Mts (Hungary) (VÖRÖS 1983, in press). — Localities: Kericser (Ibex and Davoei Zones); Lókút (Davoei Zone); Kőris-hegy (Davoei Zone). Family Basiliolidae COOPER 1959 This family was considered in the "Treatise" (AGER 1965) as one, embracing uniplicate to sulcate forms without median septum and septalium and with falcifer crura; the time range was Creataceous to Recent. Unfortunately, in their very useful work on the evolution of Mesozoic rhynchonellids, ACER et al. (1972) fail to discuss the Basiliolidae. They only suggest that Neorhynchia ought to be removed from this family to the Norellidae (I.e., p. 166). This procedure, however, cannot be approved: Norellidae have dilferent, arcuifer crura. On the other hand, DAGYS (1974) extended the range of the Basiliolidae back to the Permian (with Gerassimovia from the Permian and Veghirhynchia from the Triassic); this view is accepted here. Subfamily uncertain Genus Kericserella gen. n. Derivatio aominis : after the name of the locality Kericser-hill in the Bakony Mts., Hungary. Type species: A', inversaeformis (SCHLOSSER, 1900) (monotypy) Diagnosis : small rhynchonellids. subtrigonal to rounded in outline, biconvex, sulcate anteriorly. Costae few. strong, rounded. Planareas flat, well demarcated by beak ridges. Beak small, erect. No median septum and septalium. Crural bases supported by elevated inner socket ridges; crura falcifer(?).