The Architectonicidae and Mathildidae (Gastropoda, Heterobranchia) of the Miocene Paratethys Sea-victims of the Miocene Climatic Transition Author Harzhauser, Mathias 0000-0002-4471-6655 Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria. mathias. harzhauser @ nhm-wien. ac. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655; mathias.harzhauser@nhm-wien.ac.at Author Landau, Bernard 0000-0002-4471-6655 Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria. mathias. harzhauser @ nhm-wien. ac. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655; & Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, Netherlands; Instituto Dom Luiz da Universidade de Lisboa, Campo Grande, 1749 - 016 Lisboa, Portugal; and International Health Centres, Av. Infante de Henrique 7, Areias São João, P- 8200 Albufeira, Portugal. bernardmlandau @ gmail. com; https: // orcid. org / 0000 - 0002 - 7768 - 8494 & Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria. mathias. harzhauser @ nhm-wien. ac. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655; mathias.harzhauser@nhm-wien.ac.at text Zootaxa 2023 2023-11-14 5370 1 1 74 https://www.mapress.com/zt/article/download/zootaxa.5370.1.1/52270 journal article 10.11646/zootaxa.5370.1.1 1175-5334 10147814 48903495-7C6C-46E4-9B1B-D6A2F2781873 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 ).