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

Szabó, J.: Lower and Middle Jurassic Gastropods from the Bakony Mountains (Hungary). Part V.: Supplement to Archaeogastropoda; Caenogastropoda

Ornament — The whorls are covered with cancellate ornament, which appears at first glance as the result of a strongly and a less prosocline transverse rib type. However, even slight magnification shows, that the sculpture is formed by tiny, arched riblets, which are joined scale-like. The ribs, which are visible by unaided eye, are built up by properly curved parts of several arches of different age. The arches of the same growth stage are arranged parallel to the prosocline diagonals of the parallelograms of the apparent network, with concavities toward the opisthocline diagonals. Every convex sides of the small arches are connected to the lower end of the upper one and upper end of the other of the two neighbouring arches from the previous row, usually in tiny, spiniform protuberances (see Plate I: fig. 15.). The carinae running suprasuturally. and the periphery are ornamented with a line of small nodes fitting to the arch-rows. The base is ornamented only with opisthocyrt growth lines. Distribution — Western Carpathians. Babierzowka: Upper Callovian; Bakony Mts, Somhegy : ?Parkinsoni Zone (all specimens from a fissure-filling limestone, which penetrates the welldated sequence of Humphriesianum to Parkinsoni Zones). Remarks — Despite the significant temporal difference, the Bakony specimens match well the description of UHLIG. L. supraliasicus (VACEK, 1886) is somewhat similar, but it has a broader base and the ornament differs markedly: the elements corresponding to the lessprosocline components of the network are stronger, while the other direction is hardly discernible. L. papiraceus (HÉBERT et DESLONGCHAMPS, 1860) has a more depressed shell and one component of the sculptural network is opisthocline. Lamelliphorus suessi (UHLIG. 1878) (Plate II: figs 10-11) 1878: Onustus Suessi n. f. — UHLIG. p. 650, pi. 16, figs 4-5. 1881 : Trochus (C

arinidea) Suessi UHLIG p. 404, pi. 7, figs 12-14. Measurements: H HL HA D W A Plate II: figs 10-11. — 6.3 4.7 14 7.3 — Material — Seven fragmentary internal moulds and shelled specimens. Shape — The shell is dextral, moderately high, coeloconoid. The whorls are flat on the juvenile shell, with a convexity on their lower edge, the later whorls are concave, with a carina in the place of the previous convexity base is fiat, with an excavation in the middle, anomphalous, but along the columellar lip runs a shallow furrow. The peristome is extremely prosocline, the basal lip is slightly reflected and thickened to form a callus. On the middle portion of the posterior margin of the callus a protruding recess is situated. The parietal lip is covered also by a marked callus. Ornament — The whole spire is covered by spiral lines, of which 2 to 3 run near the periphery on the base, and an other in the middle of the base. This latter shows the trace of the recess on the callus. The growth lines are strongly prosocline on the whorls, opisthocyrt on the base and break along the single spiral line. Distribution — Western Carpathian. Babierzowka: Upper Callovian; Bakony Mts.: ?Bajocian. Plate II. Figs 1-2. Katosira undulata (BENZ). Kericser, X 1.1. Fig. 3. Katosira periniana (D'ORBIGNY). Kericser, X 1.6. Fig. 4. Anoptychia turgida (STOLICZKA), Sümeg, X2.2. Figs 5-6. Anoptychia hastata sp. n., holotype J 10135, Somhegy, X 1.6. Fig. 7. Procerithium (Cosmocerithium)l angulocostata sp. n., holotype J 10136, Somhegy, X4.3. Figs 8-9. Cerithinella rigauxoides sp. n., holotype J 10137, Somhegy. 8 = X 1.9. 9 = X4.9. Figs 10-11. Lamelliphorus suessi (UHLIG), Somhegy, X2.4