Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 74. (Budapest 1982)

Szabó, J.: Lower and Middle Jurassic Gastropods from the Bakony Mountains (Hungary). Part IV.: Neritacea, Craspedostomatacea, Amberleyacea (Archaeogastropoda)

Neritopsis (Neritopsis) fabianii TONI, 1912 (Plate I: figs. 4-5) 1912: Neritopsis fabianii Tom, p. 40, pl. II, figs. 3a-d. Measurements: H HL HA W D A Plate I: figs. 4-5 8.5 13.5 130° Material : More than forty specimens, most of them are preserved as inner mould with shelly portions and a few of well conserved shelly specimens. Shape : Dextral, low-spired, subglobose shell. The upper border of the whorls is bent upwards along the upper suture. The last whorl is covering the former parts of the shell almost completely. The peristome is rather circular and angulate at the suture. A narrow callus is also present at the inner lip. Ornament : The whole surface of the teleoconch is ornamented by spiral lines of two kinds alternating each other on the adult shell. On the juvenile parts, the secondary lines are absent. The prosocline growth-lines are arranged in bundles appearing subregularly on some specimens. On some other specimens, these bundles are protruded as low ridges near the suture. From a small number of the tests, the bundles and the ridges are lacking. Embryonal shape and ornament : A single, recrystallized embryonal shell observable, snowing a shape similar to the adult and no ornament. Distribution : Southern Alps. Belluno: Middle Liassic; Bakony Mts., Kericser: beds with mixed Obtusum to Ibex Zone faunas; Kisnyerges-árok: Jamesoni and Ibex Zone; Lókúti-domb; Davoei Zone; Káváshegy: ? Davoei Zone; Bocskorhegy: Davoei Zone: Közöskúti-árok : Ibex Zone; Gombáspuszta: Carixian, mainly Ibex Zone. Remarks: In spite of the relatively high number of the specimens, the identification of this species was difficult, owing to the lower number of such specimens having no marked transversal ornamental elements, than it is in Toni's depiction. The measurements do not vary as do the sculpture. Neritopsis fabianii specimens with transversal ornament are similar to N. elegantissima and related species, but the latter have rarer, longer and stronger varices than the former. Neritopsis (Neritopsis) papodensis sp. n. (Plate I: figs. 6-9) Holotypus : Plate I : figs. 6-9 ; Locus typicus: Lókút, Fenyveskút ; Stratum t y p i c u m : vertical fissure-filling limestone; Derivatio nominis: the locality is on the slope of Mount Papod. Diagnosis : rather protruded spire; longitudinally striated; suture to suture (or to inner lip) costae on the juvenile part only. Measurements: H HL HA W D A Plate I: figs. 6-9 11.5 10.5 9 8.5 11 118° Material : Four, more or less fragmentary specimens. Shape : Dextral, naticiform shell with moderately protruded spire and a strongly convex surface of the whorls. A narrow ramp is also present. The peristome is somewhat ovate bearing an angulation at the suture and no outer thickening. Inner lip with narrow, thin callus, partly unpreparable. Ornament : On the teleoconch, spiral cords are the first sculptural elements, then secondary lines appear in almost all of interspaces, too. These are crossed by prosocline growth-lines and a few suture to suture (to inner lip, on the base) collabral costae. The costate shell portion begins a quarter whorl after the protoconch and it endures on the following whorl. Embryonal shape and ornament: The protoconch consists of about two whols, second of which is observable in the available material. It is convex, smooth and angulate near the upper suture on the last quarter whorl. A sharp prosocline-prosoycrt growth-line indicates the end of the protoconch, where the spiral cords of the teleoconch suddenly begin. Distribution: Bakony Mts., Fenyveskút: (near to Kericser at Lókút) Domerian.