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

Exhalant trema situated upon radially elongate elevation, somewhat removed apically from midway between peristome and apex. Available material indicates that elevation consists of two radial riblets, being seamed after formation of trema. Between trema and apex these riblets separate, possibly bordering short selenizone. On some specimens, concentric undulation of shell visible in apical view. This feature more conspicuous on inner moulds. Muscle scar horse-shoe shaped, symmetrically appears on inner surface as more marked, but shallow concentric depression in height of trema, on posterior side of shell (Figure 48: B). Sculpture — Most distinct sculpture elements radial ribs, being nearly evenly spaced. Two of them along elevation of trema course with wider interspaces. These ribs appear at apex, but in their interspaces, secondary ribs develop later, then weak threads appear near peristome as third generation of radial elements. Secondary grade of ribs missing in band between two ribs bordering field of trema elevation, while tertian' grade represented here with more (i.e. 3—3 or 4—4) elements. First order riblets in apical region indicate trochospiral initial coiling. Growth-threads do not run side by side within neighbouring bands between radial elements, and this results characteristic texture of lines (see Figure 48: D). Remarks — Correctness of the family ascription of Austriacopsis to Emarginulidae seems questionable; its exhalant opening is a trema, therefore distinction from the peristomal slit bearing forms seems necessary (like in case of Trochotomidae in Pleurotomarioidea). Exhalant opening of the fissurellids is morpologically similar to a trema, that is why this family attribution has been selected here but some differences are obvious; further studies are necessary to the best final decision. Distribution — Hallstatt, Hicrlatz Alpe, Upper Sinemurian (Oxynotum Zone); Bakony Mts, Upper Sinemurian to Upper Pliensbachian: Lókút, Kericser, Obtusum to Stokesi Zones, Szentgál, Raricostatum Zone). Figure 48 — Austriacopsis (Austriacopsis) austriaca (HÖRNES, 1853) (A-D) and Emarginula (Emarginula) vedanaei TONI, 1912 (E—F) — 3 a-c: STOLICZKA's (1861) figures of Rimula austriaca HÖRNES (copy from Tafel V); A: paralectotvpe (inner mould, xl); B: lectotype (shell interior, xl); C: exterior of a specimen from the Bakony Mts (Lókút, Kericser), having the available best preserved shell, xl; D: magnified view of the specimen in image C to display details of the ornament, x5; E-F: anterior (E) and lateral (F) views of Emarginula (Emarginula) vedanaei, x2.5. Family Emarginulidae GRAY, 1834 Genus Emarginula LAMARCK, 1801 Type species: Emarginula conica LAMARCK, 1801 Emarginula (Emarginula) vedanaei DE TONI, 1912 (Figure 48: E-F) 1912: Emarginula vedanaei n. sp. —

DE TONI, p. 38, pi. 2, figs 1 a-d. 1980: Emarginula (Emarginula) vedanaei

DETONI, 1912 — SZABo, p. 66, pi. 4, figs 1(1-11. 1991: Emarginula (Emarginula] vedanaei DE Toxi, 1912 — CoNTI & MoXARl, p.266, pi. 7

, figs 7-14. 1995: Emarginula (Emarginula) vedanaeiDETONI, 1912 — CONTI & MONARI, p. 203, pi. 1:11. Material — Three poorly preserved specimens (HGM). Measurements H HA I

. LP W Figure 48: E-F 4 1 5.5 3.5 5