Nipteraxis pozsgayae (Kovács Leél-Őssy & Vicián, 2023)

Harzhauser, Mathias & Landau, Bernard, 2023, The Architectonicidae and Mathildidae (Gastropoda, Heterobranchia) of the Miocene Paratethys Sea-victims of the Miocene Climatic Transition, Zootaxa 5370 (1), pp. 1-74 : 38

Nipteraxis pozsgayae (Kovács Leél-Őssy & Vicián, 2023)

Figs 11C 1 –C 3

* Solatisonax pozsgayae n. sp. — Kovács et al. 2023: 40, figs 104–106.

Type material. Holotype: PAL 2022.52, SL: 7.2 mm, MD: 15.1 mm, lower Ottnangian , Parádfürdö, Ilona Valley ( Hungary); Figs 11C 1 –C 3 .

Revised description. Medium-sized, solid, lenticular shell of about four teleoconch whorls with moderately low conical spire. Earliest whorls not preserved. SSC broad, indistinct; three convex MCs; UPC and LPC with two weak spiral cords intercalated; all spiral cords densely beaded. Periphery angulated with prominent, beaded keel, formed by LPC. Base weakly concave below keel, weakly convex below. Two narrow spiral cords intercalated between LPC and moderately prominent IPC. Basal field with four slightly wider spiral cords. Umbilical area and aperture covered by sediment.

Discussion. This species is poorly understood because the only available specimen is not well preserved, and the sculpture is somewhat abraded. Of the herein described species, only Nipteraxis exmoniliferus (Sacco, 1892) is superficially similar but is smaller and differs in its more prominent beads and dorsal and basal sides.

Paleoecology. The assemblage from Parádf̧rd̂ ( Hungary) as described by Kovács et al. (2023) points to shallow marine environments.

Distribution. Only known from the Ottnangian (mid-Burdigalian) of the Central Paratethys Sea.

Central Paratethys Sea. Ottnangian (Early Miocene): Early Miocene North Hungarian Basin: Parádf̧rd̂ ( Hungary) ( Kovács et al. 2023).

Figures

FIGURE 1. Descriptive terms used in descriptions of Architectonicidae (modified from Bieler 1993).

FIGURE 3. Descriptive terms used in descriptions of Mathildidae.

FIGURE 11 A1–A3. Solatisonax transversa nov. sp., holotype, NHMW 2016/0177/0341, Lăpugiu de Sus (Romania). B1–B3. Heliacus globosus nov. sp., holotype NHMW 1907/0328/1959a, M̂llersdorf (Austria). C1–C3. Nipteraxis pozsgayae (Kovács Leél-Őssy & Vicián, 2023), holotype, PAL 2022.52, Ottnangian, Parádfürdö, Ilona Valley (Hungary).