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

Remarks — This shell fragment is most similar to Wortheniopsis (Sisenna) hierlatzensis n. sp. but its shells are without angulation in that growth stage where measurements are similar to that of Wortheniopsis (Sisenna) aff. hierlatzensis; the position and morphology of the selenizone and the outer face are also different. Distribution — Lókút, Kericser (Bakony Mts): beds with mixed Obtusum to Ibex Zone fauna. Family ? Phymatopleuridae BATTEN, 1956 Genus Trochotomaria CONTI & FISCHER, 1984 Type species: L£ptomaria somhegyensis SZABO, 1980 Shape — Moderately high, feebly coeloconoidal shell with rather low, evenly arched, convex whorls, and moderately impressed suture. Selenizone rather wide (~20 % of distance between sutures) and running slightly below midwhorl; its surface feebly concave on juvenile whorls but flattened on last whorl. Peripher)' rounded angular, base low, convex and rather broadly phaneromphalous. Sculpture — Collabral ornament consists of periodically repeated riblets between adapical suture and. adapical edge of selenizone, and similarly spaced lunulae on selenizone itself. Lunulae gradually disappear on last whorl. No collabral ornament developed on base, disregarding delicate growth-lines. Collabral morphological elements fairly prosocline and feebly prosocyrt between adapical suture and selenizone, slightly prosocyrt between selenizone and abapical suture (or periphery); parasigmoidal growth-lines on base. Spiral threads appear on whorls and abaxial half of base. Most prominent two threads delimit selenizone, few similar ones visible at periphery, and between selenizone and back (C) and abapical suture on previous whorls. Spiral threads become thinner towards suture in belt adaxially from selenizone and gradually weaken on base, then vanish towards coiling axis. Remarks — Trochotomaria collects conical pleurotomarioidean shells with concave selenizone and no angulation on the outer surface of the whorls that are covered by delicate network ornament. The habit of shell of the new species well corresponds to this genus concept, however, the shape, the measurements and the details of the ornament are different from those of the type species. Trochotomaria lobitzeri SZABÓ, 2008 has coeloconoidal shell outline while T. somhegyensis has simple cone shape of 45° apical angle, but the smallest measurable coiling angle is 78° in the new species. The reticulate ornament evenly developed on the shells of the type species but different belts are on the shell of Trochotomaria lobitzeri. The umbilicus is much wider in Trochotomaria lobitzeri than in Trochotomaria somhegyensis. Comparing to the species "from the same box" AnodoTrochotomaria lobitzeri SZABÓ, 2008 (Figure 28) pars 1861 : Pleurotomaria suessi HÖRN I -S — ST( )L1CZKA, p. 192, pi. 5, figs 1 a-b. 2008: Trochotomaria lobitzeri n. sp. — SZABÓ, p. 173, fig. 3: 7-11. Material — Single specimen without early shell parts and peristome, holotype (GBa 2008/69/45/5). Measurements H HL HP D W AA AL holotype *9.5 *6 *20 **78° *91° Figure 28 — Trochotomaria lobitzeri SZABÓ, 2008 (refiguration of the holotype). — A-C: "apertural" (A), apical (B) views, xl; D—E: magnified side and apical view to show details of the ornament, x3.