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

(visible on fragmentary paratype). Basal rim of umbilicus widely arched. Sculpture — Whorls, as well as base, covered by strong spiral cords, undulating at zones of nodes and ridges. Collabral ornament consists of marked growthlines, being prosocline above selenizone, prosocyrt on outer face and opisthocyrt on base. Ramp of juvenile shell bears characteristic opisthocline-opisthocyrt arched ridges, crossing course of growthlines. These shorten on subsequent whorls, and tend to restrict to abaxial ramp edge and to become parallel to growth-lines in their arrangement. Nodes at peripher}weaker, denser and slightly elongate collabrally but fading out rapidly both ad- and abapically. Figure 32 — Pleurotomaria eplenyensis n. sp., holotype. — A-D: "peristomal" (A), dorsal (B), apical (C) and basal (D) views, xl; E: details of the ornament in apical view, x2; F: basal ornament, x2. Remarks — These specimens were identified by SZABÓ (1980) as P. anglica. However, rigorous morphological analysis and comparisons between specimens suggested a distinction from the true P. anglica. There are differences in the measurements: Pleurotomaria eplenyensis n. sp. has slighdy lower spired shell and more rapidly expanding whorls, but the more important distinctive characters are found in the morphology of whorls and the nodosity. The whorls (abaxial edge of ramp and peripher}

7

) are rather sharply angular in P. anglica, but strongly rounded in Pleurotomaria eplenyensis n. sp. In Pleurotomaria anglica, the nodes are smaller, shorter, denser, not arched and collabrally elongate, furthermore, the ramp row of them are restricted to the midwhorl angulation. The stratigraphically younger Bakony forms, as compared to Pleurotomaria aff. anglica (see below) from the Hierlatz Alpe, show bigger spire angle, diameter and whorlheight. The Hierlatz finds have fewer and stronger spiral ornamental elements than Pleurotomaria eplenyensis n. sp. Their shared character, differently from Pleurotomaria anglica, is the not collabral orientation of the ridges. These ridges are constandv straight in Pleurotomaria aff. anglica but arched in the juvenile Pleurotomaria eplenyensis n. sp. specimens. The similarly shaped Pleurotomaria escheri MÜNSTER, 1844 has a cancellate ornament against the dominant spiral sculpture of Pleurotomaria eplenyensis n. sp., additionally, the nodes are sparser, just like in Pleurotomaria armata MÜNSTER, 1844, which has also more convex base, much wider spire angle and spirally elongate nodes. Distribution — Bakony Mts, Eplény: Upper Pliensbachian. Pleurotomaria aff. eplenyensis (Figure 33) 2003: Pleurotomaria aff. anglica Q. SOWERBV, 1818) — SZABÓ in: VÖRÖS et al., p. 61, Pl. V: 2-3. Material — Single specimen amongst STOLICZKA's (1861) originals in the NhM (1859/0019/0054), labelled as "Prochotoma striatum HÖRNES, 1853". M e a s u r e m e n t s: H III. HP D W AA AL NhM 1859/0019/0054 **40 **38 - **80° **80°