Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 26. 2008. (Budapest, 2008)
D. excavata strong nodes develop, and strong, widely spaced ridges replace the bars in the sculpture. The juvenile whorls are probably distinguishable on their dimensions but this procedure needs larger material of D. miocarinata. D. acarinata is cüstinguishable on the smaller size and on absence of carinae on the angulations after the earliest juvenile shell. Distribution — Bakony Mts: Lókút, Kericser, beds with mixed Obtusum to Ibex Zone fauna; traces of re-deposition, perhaps older than Ibex Zone; Central Italy, Monte Qmitelle and Sasso di Pale, both Pliensbachian. Discohelix inornata SZABÓ, 1979 (Figure 10) 1979: Discohelix inornata sp. n. — SZABÓ, p. 23, pl. 1, figs. 6-7; (text)fig. 6c. Material — Three damaged specimens (HGM). Measurements H holotype (HGM J 9591) 7.2 paratype *5.6 HI Shape — Flattened, dextral form with concave spire and nearlv bilateral symmetry. Protoconch whorls, studied in sections, show slight rise on spiral side. Angulations, being somewhat sharper on juvenile whorls, bear no carinae. Surface of whorls slightly convex, but less convex on spiral and umbilical side than on outer face. Last whorl expanding, adult peristome tapering and remnants suggest trumpet shape but no trace of thickening found. Sculpture — Fine growth-lines visible on all shells; recently cleaned umbilical side of holotype preserved traces of sub-periodically repeating very weak riblets (typically D *29.1 W 6.8 *3.5 AS 216 C 224 c AU 144 e developed in D. acarinata) on juvenile whorls but disappearing on penultimate whorl. Paratope shows no traces of the rudimentär)' riblets. Remarks — The characteristic, axially depressed shell form and the dimensions make this species well distinguishable from the other smooth shelled species (D. levis WENDT, 1968, Discohelix sima n. sp. and Discohelix stolic\kai n. sp.). Beside these, the first two mentioned species have carinate angulations on the teleoconch. Distribution — Bakony Mountains: Sümeg, PUpper Sinemurian. Figure 10 — Discohelix inornata SZABÓ, 1979; refiguration of the holotype and a paratype (HGM). — A-C: holotype in spiral (A), outer side (B) and umbilical (C) views, xl; D: magnified view of the recently cleaned umbilical side of the holotype to show weak traces of the ornament type, consisting of periodically repeating riblets, following each-other roof-tile like (not visible on the paratypes), X4; E—F: images of one of the paratypes (spiral view), x 1 and x 3. Discohelix acarinata SZABÓ, 1979 (Figure 11) cf. 1979: Discohelix acarinata sp. n. — SZABÓ, p. 24, pl. 1, fig. 10; pi. 2, fig. 12, (text)fig. 6a. 1994: Discohelix cf. acarinata SZABÓ — CONTI & MONARl, p. 200, pl. 1, fig. 6. Material — Thirteen specimens from two Bakony Mts localities (HGM, holotype J 9593).
