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

terminating at abapical end of columellar lip. Abapertural side of carina extending towards base and forming semicircular callus of concave surface. Material — A single specimen with damaged apex and peristome. Measurements H HL HP holotype *17.5 10 6.5 Figure 54 — Lewisiella? turbinata n. sp., holotype. — A-B: holotype in peristomal (A) and basal (B) views, xl; C—D: the same views, magnified to display details of the shell, x2. Shape — Moderately high turbiniform shell with convex whorls; their inner space being nearly circular in cross section. Suture impressed, accompanied by narrow, upyvard bending subsutural belt. Periphery rounded, base convex with large, median depression; shell narrowly phaneromphalous. Peristome continuous, rather strongly thickened at suture and parietal region. Heavy carina surrounds narrow umbilicus and terminates at columellar lip. Thinner, semicircular callus of concave surface attaches carina to base on abapertural side. Sculpture — Whorls covered by fine, prosocline growth lines, turning into nearly orthocline on base then strongly prosocyrt near callosity and broken at boundary of callus that gives rise to strong peri-umbilical carina. Obscure spiral grooves may intersect growth-lines on whorls only. D W AA AL 10.5 *6.5 *45 45° Remarks — The shape of the spire in this species is practically the same as in Ataphrus aciculus (HÖRNES, 1853), that is why SZABÓ (1983) has applied the name "Lewisiella acicula (HÖRNES, 1853)". However, study of the original specimens proved the species identification was erroneous (see Ataphrus aciculus HÖRNES, 1853, above). During the recent revision, an accidental damage of the only specimen exposed a surface, displaying cross-section of a narrow umbilicus that had been not observable previously. In the recent state of knowledge, the only specimen of Lewisiella? turbinata n. sp. belongs to a species that may be a high spired transformation of Bakonyia SZABÓ, 1981 however, the protonchs hay

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e not yet been comparable. From "IjzwisiellcT conica (D'ORBIGNY, 1853) (FISCHER & WEBER 1997), Lewisiella? turbinata n. sp. differs in having somewhat smaller spiral angle, more convex whorls and base, and in the presence of an umbilicus. After all, Lewisiella? turbinata n. sp. is much more similar to the holotype of Pitonellus conicus D'ORBIGNY, 1853, presented by FISCHER & WEBER (1997), than the specimens, which have been conspecific with it by STOLICZKA's (1861) opinion (see Lewisiella stoliczkai n. sp. above). The similarities in the shell construction to Bakonyia mean new data to tracing of phylogenetic connections within Ataphridae. Distribution — Lókút, Kericser (Bakony Mts), beds with mixed Obtusum to Ibex Zone faunas (Upper Sinemurian to Lower Pliensbachian). Subfamily Crossostomatinae COX, 1960 Genus Crossostoma MORRIS & LYCETT, 1851 Type species: Crossostomapratti MORRIS & LYCETT, 1851 Crossostoma macrostoma (STOLICZKA, 1861) (Figure 55) 1861 : Rotella macrostoma STOL. — STOLICZKA, p. 178, pi. 3, fig. 5. Lectotype — GBa 2008/69/29/1 (selected here). Material — Thirty-nine specimens of various preservation. Measurements 11 III. HP lectotype *6 5.7 5.3 GBa 2008/69/29/2 6.6 5.5 5.4 Shape — Specimens of low spire, consisting of few, rather depressed and rapidly expanding whorls. Suture feebly impressed; peripher)

7 rounded; base convex. Last fifth whorl outward expanding, outer lip of adult peristome trumpet-like. Peristome discontinuous at parietal region, columellar lip short. Sculpture — Only growth-lines yisible as sculpture D W AA AL 11.6 6.8 *16()° *160° 10 - 138° 138° on shell, being prosocline on whorls and markedly parasigmoidal on base. Weathered surface show each growth line corresponds to frontal edge of backward sloping thin shell layer. Remarks — Some of the Hierlatz specimens show rudimentary abaxial deviation from the normal coiling like in Adeorbisina GRECO, 1899. However, the deviation