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

dextrallv coiled, but the position of the less concave side in Discohelix ornata specimens suggest false or true sinistral coiling of the species. The nodosed Pliensbachian Sicily Discohelix, published by M. GEMMELLARO (1911), who has interpreted D. orbis similarly to STOLICZKA (1861), and Discohelix ferox VON GÜMBEL, 1861 are also comparable species but their nodosity are much stronger, sparser and of different morphology, their measurements are also significantly different. Distribution — Hallstatt, Hierlatz Alpe, Upper Sinemurian (Oxynotum Zone). Figure 3 — Discohelix pseudornata n. sp. (A-D, M-N) and Discohelix ornata (HÖRNES, 1853) (E-L). — 9,10: copies from STOLICZKA's (1861) Tafel III; figures of "Discohelix ornata", composed of morphological elements from the two species, visible in the photos; A-D: Discohelix pseudornata n. sp. holotvpe; spiral (?) (A), apertural (B), umbilical (?) (C) and dorsal (D) view, xl; E-G: Discohelix ornata (HÖRNES, 1853), lectotype, umbilical (?) (E), back (F) and spiral (?) (G) view; xl; H-J: Discohelix ornata (HÖRNES, 1853), a paralectotype (GBa 2008/69/32/2/2) showing more distinctly a less excavated spire (?) side (H) and asymmetrical "peristomal" (I) and back view (J), suggesting also possibility of sinistral coiling, xl; K—L: magnified views of the lectotype of Discohelix ornata (HÖRNES, 1853) to show details of the ornament, x2.5; M-N: magnified views of Discohelix pseudornata n. sp. holotype to show details of the ornament, x2.5. Discohelix hallstattensis n. sp. (Figure 4) Holotype — GBa 2008/69/32/4/1. Type locality — Hallstatt, Hierlatz Alpe. Type strata — Upper Sinemurian (Oxynotum Zone) Hierlatz Limestone. Name — From town Hallstatt, lying at the feet of Hierlatz Alpe. Diagnosis — Axially depressed, (false) sinistral shell; spire concave; regularly corrugated carinae on outer angulations of juvenile whorls; strong, collabrally elongated, subregularly repeating nodes on angulations of body whorl. Material — A single specimen from a Discohelix orbis box of STOLICZKA's "background collection". Measurements H HI HPW holotype **10.5 *5.5 + supposing false sinistral (dextral) coiling Shape — Depressed discoidal specimen, sinistral or (more probably) false left-handed. Whorls flat on spiral and umbilical side, feebly, evenly convex on outer face. Peristome not preserved. D W AS AU *34.5 *7 +

220° +153° Sculpture — Carinae of outer angulations prominent along preserved early whorls (protoconch, nucleus and ""1st whorl, dissolved during fossilization). On second half of penultimate whorl, carinae become flattened then