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

SZABÓjJ.: Revision of Hierl B Figure 18 — Ptychomphalus kericserensis n. sp. — A-D: spiral (A), basal (B), apertural (C) and dorsal views of the holotype, x3; E-H: same views of the holotype in natural size. Shape — Dextral, sublenticular form. Spire depressed conical and consisting of feebly convex whorls. Peripher}

7 sharp, with narrow, concave selenizone immediately above it. Selenizone visible on last whorl but overlapped on former whorls. Suture just coincides with adapical rim of selenizone of previous whorl. Distinctly convex base, being higher than spire. Inner lip, forming thick, subatz Limestone gastropods 25 circular callus, extending to middle part of base. Outer lip completely lacking. Sculpture — Spire ornamented with fine, prosocline growth-lines and collabrally elongate nodulae along suture. Nodulae fade out gradually on last whorl, merging into weak spiral elevation on last half whorl. Ornament of base consists of prosocyrt growth-lines and fine, dense spiral lines on peripheral part. These latter become gradually weaker from periphery to about middle of base. R e m a r k s — Nodes are lacking from SOWERBY's (1821) Helicina expansa, however, some subsequent authors (e. g.: D'ORBIGNY 1853, MÜNSTER 1844) have regarded also such forms as Ptychomphalus expansus that have weaker or stronger nodes along the suture. First SlKBERER (1907) applied the nodosity as main character to distinguish his species "CiyptaenicP nodosa from the smooth shelled "C". expansus. Ciyptaenia nodosa is much larger than Ptychomphalus kericserensis n. sp. and shows no nodes on that part, where the Bakony specimen is nodosed. The nodosity of Cryptaenia nodosa onsets just in that growth stage, in which the row of tubercles of Ptychomphalus kericserensis n. sp. changes into continuous swelling. The measurements are strongly different both from P. expansus and P. nodosus. Distribution — Bakony Mts., Kericscr: beds with mixed Obtusum to Ibex Zone faunas. Ptychomphalus heliciformis ( J. A. EUDES-DESLONGCHAMPS, 1849) (Figure 19) 1849: Pleurotomaria beticiformis — J. A. EUDES-DESLONGCHAMPS,p. 149, pi. 17, figs 2 a-d. 1854: Pleurotomaria heliciformis). A. EUDES-DESLONGCHAMPS — Cl IA PL" IS & DKVAI.QL'E, p. 96, pi. 12, figs 13 a-d. 1854: Pleurotomaria rotellaeformis DINKER — D'ORBIGNY, p. 400, pi. 348, figs 3-7. 1861: Pleurotomaria heliciformis DESLONG. — STOLICZKA, p. 186, pi. 3, fig. 17. 1874: Pleurotomaria helinformis). A. EUDES-DESLONGCHAMPS — GEMMELLARO, G. G., p. 93, pi. 12, fig. 21. 1997: Ptychomphalus heliciformis (J. A. EUDES-DESLONGCHAMPS, 1849) — FISCHER & WEBER

, p. 155, p. 25, figs 15 a-b, 16 a-b. Material — Twelve specimens of various preservation (GBa 2008/69/38/1—12). Measurements H HL HP GBa 2008/69/38/1 *17 14.5 13.5 1) 30 W 14.6 AA 148° AL Figure 19 — Ptychomphalus heliciformis Q. A. EUDES-DESLONGCHAMPS, 1849). — 17 a-b: copy of figure from STOLICZKA (1861) Tafel III.; A-D: photos of the specimen, drawn by STOLICZKA, apical (A), basal (B), apertural (C) and dorsal (D) view, X 1. Shape — Rather large, sublenticular shell with flattened spire consisting of slightly convex, rapidly increasing whorls, separated by thin incision of suture. Whorls and base roughly equally high. Periphery angular but strongly rounded and bearing rather wide, somewhat flattened selenizone on its adapical slope. Outermost tine of shell coincides with abapical edge of selenizone, being invisible on spire whorls because suture of subsecjuent whorl just running on its adapical rim. Terminal part of selenizone damaged but remnants suggest short (about 5 mm) slit. Base convex, with rather broad periaxial depression; shell probably moderately phaneromphalous or cryptomphalous (suggested also by cross-sections of axial region on some broken specimens). Aperture feebly