Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 21. 2003. (Budapest, 2003)

Early Jurassic fauna and facies of the Schafberg area Palaeontological notes Cyclostomaria sp. — This species has depressed, extreme widely phaneromphalous shells, tending to planispiral, with circular whorl cross-section. Whorls are slighdy attached to each other therefore both the spiral and umbilical sutures are canaliculate. Selenizone runs on the highest adapical line of the whorls. Ornament consists of spiral threads and cords, cancellated by collabral threads. The latter ones became weaker on the last whorl The available Cyclostomaria specimen (MTM) seems identical with the type species needing a nomenclatorical revision (SZABÓ 1980, SZABÓ in prep). Occurrences: Eplény (Bakony Mts, Hungary); Schafberg (Salzkammergut, Austria). Anodomaria anodosa SZABÓ, 1980 (Plate V: 1) — Anodomaria anodosa has gradate shell form with distinct spiral angulations, one slightly above the midwhorl, and another at the periphery. A rather wide selenizone runs in the middle of the outer face of die whorls. The base is convex and moderately phaneromphalous. A network of threads covers the whorls and there is a single spiral cord on both angulations, respectively. The Schafberg specimen (GBA) corresponds to the juvenile part of the type specimen, found in the Eplény (Bakony Mts, Hungary, HGI) fis sure-filling ferro-manganiferous limestone. Schafberg is the second known locality of the species. The species itself seems extremely rare; two+?one specimens has been found in the two localities. Pleurotomaria aff. anglica (J. SOWERBY, 1818) (Plate V: 2-3) — A single specimen (NM) belongs to this species of moderately high, gradate shell. It has a single row of periodically repeated, slighdy opisthocline ridges between the suture and the abaxial edge of the ramp. The outer face of the whorls is wide and slightly convex; the selenizone runs on the adapical half of this surface. Base is feebly convex and narrowly phaneromphalous. No peristome part is observable. Unequally sized, irregularly undulating, dense spiral cords cover the whorls. Juvenile shell part has reticulate ornament of equally strong threads but the collabral ones fade away on the subsequent whorls, only the growth-lines cross the spiral cords. The single row of ridges on the ramp is a rather characteristic morphological element but the specific identification needs further studies. The shape resembles to that of P. anglica but the latter species has also another row of collabrally elongate nodes along the periphery. The specimens are similar to but surely not identical with "Trochotoma striata STOLICZKA, 1861". This latter species has no ridges below the suture. Bathrotomaria intermedia (MÜNSTER, 1844) bears also single row of ridges on the ramp, but its spiral cords are weaker, denser and equally sized. The position of the selenizone, just on the angulation of the whorls, distinguishes it from P. aff. anglica, having selenizone on the outer face. Bathrotomaria intermedia (MÜNSTER, 1844) — The species is represented by a single specimen (MTM) with rather large, gradate shell of medium high spire. The angulation of the whorls is a^stinct and emphasised by a keel-shape selenizone. Angular periphery delimits slighdy convex and phaneromphalous base. Peristome is not preserved. Most prominent ornamental elements are regularlyrepeated, collabrally elongate ridges on the suturai half of the ramp. Dense, evenly sized and spaced spiral cords (not undulating) cover whorls and base. The position of the selenizone clearly distinguishes B. intermedia from P. aff. anglica (see above), the comparable other pleurotomarioidean species in the fauna. Laevitomaria coarctata (STOLICZKA, 1861) (Plate V: 4—7) — Thin walled shells are conical with low, moderately convex (subangulate) whorls, separated by canaliculate suture. Base is flattened and narrowly phaneromphalous. Selenizone runs between two striae at the top of the convexity on the whorls. Delicate growth-lines, some obscure spiral lines and striae are the ornament between the selenizone and the upper suture. A network of weak spiral and collabral lines is visible on the outer face of the whorls. The base is not ornamented. Two specimens from STOLICZKA (1861) collection (NM) on which the species was established. Anticonulus lautus (STOLICZKA, 1861) (Plate V: 8-10) — A small, fragmentary, conical shell is available that consists of numerous (10—12) low whorls of flat outer surface. They are feebly swollen along the upper suture and bear a distinct spiral thread on the lower edge. Suture is a marked incision; the peripher)

7 is angular. Base is feebly convex and broadly phaneromphalous. Obscure spiral lines are visible both on the whorls and the base beside distinct growth-lines. The figured specimen belongs to STOLICZKA (1861) original collection (NM). Ataphrus ? laeviusculus (STOLICZKA, 1861) (Plate V: 11—13) — A single specimen represents this species with a shape resembling not only the ataphrid genera but also a Proconulus because the whorls are relatively low and their number is unusually high. The peristome characters are not visible therefore the generic name is uncertain. This is STOLICZKA (1861) original specimen (NM) to designation of'Trochus laeviusculus". Ataphrus iatilabrus (STOLICZKA, 1861)? — Three fragmentary specimens (MTM) are identifiable mainly on the measurements. Shells are mrbinform without any trace of ornament. The visible shell portions with peristome (outer lip) parts do not show presence of an enlarged outer lip that would be indicative to a Crossostoma species, discussed below. However, the preservation is unsatisfactory to decide if the specimens were not juvenile shells of Crossostoma sp. (below).