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

Eucyclus (Eucyclus) alpinus STOLICZKA, 1861 (Figure 72) 1861: Eucyclus alpinus STOL. — STOLICZKA, p. 176, pi. 2, fig. 12. 1874: Eucyclus alpinus STOL. — GEMMELLARO, G. G., p. 98, pl. XII, fig. 13. 1911: Eugclus alpinus STOL. — GEMMELLARO, M., p. 223, pl. X, figs 26-28., 31. 1912: Eucyclus alpinus STOL. — DARESTE DE LA CHAVANNE, p. 53, pl. IV, fig. 4. 1937: Amberleya alpina STOL. — PCHELINCEV, p. 29, pl. II, fig. 14. 1966: Eucyclus alpinus STOL. — BOURROUILH, p. 36, pl. I, fig. 1. 1967: Pleurotomaria (?) obesa (TERQUEM & Pl ETTE) — SACCHI VlALLI & CANTAI.LWI, p. 118, pi. 18, fig. 2. 1982: Amberleya (Eucyclus) alpina (STOLICZKA, 1861) — SZABÓ, p. 23, pi. 2, figs 11-13. 1991: Amberleya (Eucyclus) alpina (STOLICZKA, 1861) — CONTI & MONARI, p. 272, pi. 8, figs 10-13. 2003: Eucyclus alpinus STOL. — SZABÓ in VÖRÖS et al, p. 62, pl. 5: 15 Lectotype — GBa 2008/69/25/1 (monotype). Material — Single specimen from the Schafberg (GBa); 22 specimens in the HGM. Measurements Fl HL HP lectotype *17 *12 Figure 72 — Eucyclus (Eucyclus) alpinus STOLICZKA, 1861, holotype. — 12: copy of the original figure from STOLICZKA (1861) Tafel II; A: photo of the lectotype, X2. Shape — High littoriniform shell with roundedangular periphery, deeply impressed suture and convex base without umbilicus. Peristome subquadral, its columellar lip vertical and strong, having a rather wide outer face; outer lip rather weak and thin, just like remaining parts of shell. Sculpture — Spirally, whorls ornamented by tubercled carinae, strongest of which runs along periphery well below midwhorl. Two carinae situated between suture and peripher)

7 on earliest whorls, but their number increases to four on larger (adult) specimens. Next carina below periphery, exposed only on last whorl, slightly weaker from strongest one; suture follows this one. Some other carina in peripheral region and numerous cords in internal parts ornament base spirally. These latter arranged D W AA AL *15 - - 40° with narrower interspaces than carinae and have no tubercles. Collabral ornament consists of delicate, somewhat prosocline growth-threads. Remarks — Though STOLICZKA (1861) stated that Eucyclus alpinus is frequent in the Schafberg material, a single specimen (= lectotype) represents this species in the GBa "originals collection". At the same time, this is the only specimen in this collection from the Schafberg. The earliest appearance of Eucyclus alpinus is indicated from the Raricostatum Zone (latest Sinemurian) in the Moroccan Atlas (BOURROUILH 1966). From the Early Plensbachian in association with Discohelix orbis, Eucyclus alpinus has become widely distributed in the Mediterranean Faunal Province of the Tethyan Realm and therefore they can be regarded as "palaeobiogeographical indeces" during the Pliensbachian. They occur also in some lithological types whose depositional environment is thought to hay

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e been in the deepest see bottom region during the Jurassic of the studied palaeogeographic region (e. g. Adnet Limestone). Different authors have documented also different forms, with slightly coeloconoidal outline, smaller spiral angle or slight changes in the sculptural characters. These differences mark a rather high variability of the species. Distribution — Schafberg at St. Wolfgang (Austria), Late Pliensbachian; Bakony Mts, PLatest Sinemurian (beds with mixed Obtusum to Ibex Zone fauna) to latest Pliensbachian (Stokesi Zone); Southern Alps (Italy), Late Pliensbachian; Sicily O^taly), Late Pliensbachian; Adas Mountains, Guelma (Algeria) Pliensbachian, Marocco, latest Sinemurian and earliest Pliensbachian; East Caucasus, Pliensbachian. Eucyclus (Eucyclus) mitterseensis n. sp. (Figure 73) H olo type —NhM 1861/0001/0028. Type 1 o c a 1 i t y — Schafberg over St. Wolfgang, Salzkammergut, Austria. Type strata — Sinemurian Hierlatz Limestone. Name — From the Mittersee, a lake near the Schafbergspitze; gastropod bearing rocks were found around this lake. Diagnosis — Turriculate-pagodiform shell of coeloconoidal outline, nodose-carinate angulation on whorls near