Olegia curta ( Boda, 1959 ) Harzhauser & Landau & Janssen, 2022

Harzhauser, Mathias, Landau, Bernard & Janssen, Ronald, 2022, The Clavatulidae (Gastropoda, Conoidea) of the Miocene Paratethys Sea with considerations on fossil and extant Clavatulidae genera, Zootaxa 5123 (1), pp. 1-172 : 80

Olegia curta ( Boda, 1959) nov. comb.

Figs 24E 1 –E 2 , 6

Pleurotoma (Clavatula) doderleini Hoern. — Simionescu & Barbu 1940: 125, pl. 2, figs 30–31 [non Olegia doderleini ( Hörnes, 1854)]. * Clavatula doderleini curta n. ssp. — Boda 1959: 627, pl. 29, figs 8–11. Clavatula (Clavatula) doderleini doderleini (Hörnes, 1856) —Hinculov in Iliescu et al. 1968: 147, pl. 36, figs 11a–b [non Olegia doderleini ( Hörnes, 1854) ]. Clavatula (Clavatula) doderleini doderleini (Hoernes, 1856) — Kojumdgieva 1969: 116, pl. 39, figs 4–8 [non Olegia doderleini ( Hörnes, 1854)]. Clavatula doderleini curta Boda, 1959 — Švagrovský 1971: 400, pl. 70, fig. 7.

Type material. Holotype: Sz.1432, Várpalota ( Hungary), SL: 13.4 mm, MD: 6.7 mm, illustrated in Boda (1959, pl. 29, fig. 8), stored in the Geological and Geophysical Institute of Hungary (Budapest), figs 24E 1 –E 2.

Revised description. Shell small, stout biconic; apical angle 43°. Protoconch and early teleoconch whorls not preserved. Spire whorls with narrow beaded subsutural collar, broad, weakly concave mid-portion, suprasutural cord bearing large, rounded tubercles. Early spire whorls with fine spiral cords, weakening on last whorls. Suture narrowly incised, running below beads. Last whorl 65% of total height, biconic; subsutural collar narrow, bearing 12 small rounded tubercles. Subsutural ramp very broad, weakly concave, delimited by angular, tubercular shoulder cord, weakly convex below, moderately constricted at base. Siphonal fasciole slightly swollen. Sculpture of four primary spiral cords. Adapical cord delimiting shoulder and periphery bearing medium-sized, low tubercles, second cord at mid-whorl with slightly smaller tubercles, peribasal and perifasciolar cords weak, non-tubercular. Aperture moderately wide, pyriform. Outer lip not thickened, smooth within. Anal canal wide, moderately deep, asymmetrically U-shaped with apex mid-ramp. Siphonal canal moderately short, straight, moderately wide. Columella straight, oblique, smooth. Columellar and parietal callus thickened, sharply delimited, forming broad rim and narrow chink.

Discussion. This species was established as subspecies of Clavatula doderleini ( Hörnes, 1854) by Boda (1959), but differs distinctly from that species in its broad biconic shape, the periphery being at the shoulder, and the shallower anal sinus. This very distinctive species represented by the holotype only that despite being small sized for the group looks fully adult. The placement in Olegia is tentative and mainly based on the bipartite early teleoconch sculpture of beaded spiral cords on later teleoconch whorls.

Paleoenvironment. Coastal inner neritic (own data).

Distribution in Central Paratethys. Sarmatian (middle Miocene): Vienna Basin: Rohožník ( Slovakia) ( Švagrovský 1971); East Slovakian Basin: Slanec, Bohdanovce ( Slovakia) ( Švagrovský 1971); Pannonian Basin: Várpalota ( Hungary) ( Boda 1959). South Carpathian Foreland Basin: Mărculeşti-Soroca, Seliște-Orhei, Bihor ( Moldova) ( Simionescu & Barbu 1940); Dacian Basin: Bulgaria ( Kojumdgieva 1969).

Figures

FIGURE 1. A. Map of central and south–eastern Europe, representing the area that was partly covered by the Central Paratethys Sea. The white insert corresponds to the area that is restored in the palaeogeographic map below. B. Paleogeography of the Middle Miocene Paratethys Sea showing the most important sedimentary basins (NAFB: North Alpine Foreland Basin, E.-Sopr B: Eisenstadt–Sopron Basin).

FIGURE 2. Descriptive terms used in descriptions and measurements to shell morphology, whorl profiles and anal sinus. SL: shell length, MD: maximum diameter, AA: apical angle, LWH: last whorl height, AH: aperture height.AL: aperture length.AW: aperture width.

FIGURE 6. Apertures of Paratethyan Clavatulidae (C. = Clavatula, ‘C.’ = ‘Clavatula’, G. = Granulatocincta, M. = Megaclavaltula, O. = Olegia).

FIGURE 24 A1–A3. Olegia agathae (Hoernes & Auinger, 1891), lectotype, NHMW 1999z0098/0001, Niederkreuzstetten (Austria). B1–B3. Olegia agathae (Hoernes & Auinger, 1891), paralectotype, NHMW 1861/0050/0088a, Niederkreuzstetten (Austria). C. Olegia agathae (Hoernes & Auinger, 1891), paralectotype, NHMW 1861/0050/0088b, Niederkreuzstetten (Austria). E1–E2. Olegia curta (Boda 1959), holotype, Sz.1432, Várpalota (Hungary). D1–D2. Olegia szokolyensis (Strausz, 1960), holotype, M.9, Szokolya (Hungary). F1–F3. Olegia doderleini (Hörnes, 1854), lectotype, NHMW 1866/0001/0550, Wiesen (Austria). G1–G2. Olegia doderleini (Hörnes, 1854), paralectotype, NHMW 1858/0015/0147, Wiesen (Austria).