Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 26. 2008. (Budapest, 2008)

obscure along full length of shell (dislike e.g. in D. acarinata, see below); these belts lack from outer side. From penultimate whorl, regularity decreases, belts become wide, sparse and irregularly repeating ribbons. Growth-lines very fine, their shape strongly opisthocline on spiral and umbilical sides but slightly opisthocyrt on outer side. Evenly spaced, obscure spiral lines cover outer side; obscurity may be caused by fossilisation. Remarks — As a whole, the shell form remind first of all D. excavata, however, Discohelix lobit^eri n. sp. has a much smaller adult diameter (two-thirds). At equal diameter, D. excavata has fewer whorls and more than 1.5 times higher shells than Discohelix lobit^eri n. sp. Other measurements and ratios are also strongly different. D. excavata has true nodes on the carinae of the last whorl while carinae are absent in Discohelix lobit^eri n. sp. and the corresponding angulation parts are splitted by low, wide, collabral ribbons. Discohelix acarinata (see below) has a comparable ornament, but it is much more marked, and Discohelix lobit^eri n. sp. has axially more flattened shells that is well reflecting in the measurements (e.g. spiral angle varies around 250° in D. acarinata but 210-215° in D, lobit^erin. sp.). Angulations of D. acarinata are without carinae after the third whorl, while D. lobit^eri n. sp. has them also on about three additional whorls. In D. acarinata, regularity of the collabral belts is observable on the whole teleoconch, and no trace of formation of widening is observable even on the last whorl of the specimens, having similar diameter to Discohelix lobit^eri n. sp. Rudimentary kind of this ornament has been found also on the pre-adult whorls of the holotype of D. inornata (see below) but the differences in the last whorl ornament and the shapes distinguish the two species. GEMMELLARO (1874) identified some similar specimens, named as D. excavata from the Sicily Pliensbachian, but another revision shall decide about the question of their specific identity. Distribution — Hallstatt, Hierlatz Alpe, Upper Sinemurian (Oxynotum Zone). Figure 8 — Discohelix lobitzeri n. sp. — A-B: holotype; spire(?) and "aperture" view, xl; C: magnified view of the holotvpe, shown also in A, x2.5; D: paratype; spire(?) view, xl; E: juvenile whorls of the paratype, x3.5. Discohelix miocarinata SZABÓ, 1979 (Figure 9) 1979: Discohelix miocarinata sp. n. — SZABÓ, p. 23, pl. 1, figs 8-9; (text)fig. 6b. 1994: Discohelix miocarinata SZABÓ — CONTI & MONARI, p. 200, pl. 1, figs 1-2. Material — Three specimens from the Bakony Mts (holotype: HGM J 9592). Measurements H HI HPW D W AS AU holotype *7.9 *19.8 *5.1 229° 131° Figure 9 — Refiguration of Discohelix miocarinata SZABÓ, 1979 holotype. — A: spire; B: umbilicus; C: outer side; the upper edge of the image shows arch of die outer side, opposite edge is broken; A-D = xl; D: magnified view of the spiral side, x3. Shape — Dextral form with spire less concave than umbilicus. Protoconch smooth, angulations appear one whorl after nucleus. Spiral and umbilical side of juvenile whorls flat, but slighdy convex on last two whorls; outer side moderately arched on whole shell. From penultimate whorl, after gradual transition, angulations become rounded. Peristome unknown. (Protoconch morphology of holotype had been observed before it fell out and lost.) Sculpture — Spiral ornament consists of carinae on angulations of juvenile whorls and some faint spiral lines on outer face. Collabral sculpture appears from third whorl on spiral and umbilical sides as tiny, dense growth riblets. On juvenile whorls each of these bars are accompanied by granules on carinae. Riblets fade out rapidly on outer side, along angulations. Remarks — The adult specimens can be easily distinguished from the similarly-sized D. excavata, because in this latter, a marked sculpture appears on the last whorl. In