Perrona grossi, 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 : 129-130

Perrona grossi nov. nom.

Figs 39A

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–A

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* Pleurotoma (Clavatula) Auingeri Hilb. — Hilber 1879: 433, pl. 3, figs 3a–c [non Crassispira auingeri (Hoernes, 1875) ]. Pleurotoma (Clavatula) Auingeri Hilb. — Hoernes & Auinger 1891: 339, pl. 47, figs 1a–c [non Crassispira auingeri (Hoernes,

1875)].

non Clavatula auingeri n. n.— Finlay 1927: 515 [= ‘Clavatula’ jarzynkae nov. nom.].

non Clavatula (Perrona) auingeri ( Hilber, 1879) — Mikuž 1998: 77, pl. 5, fig. 2 [= Perrona vindobonensis (Quenstedt, 1884) ]. non Perrona auingeri ( Hilber, 1879) — Mikuž 2009: 33, pl. 11, fig. 146 [= Perrona vindobonensis (Quenstedt, 1884) ].

Type material. Lectotype designated herein: SL: 26 mm, MD: 9 mm, Plirsch at St. Florian ( Austria), illustrated in Hilber (1879, pl. 3, figs 3a–c) and Hoernes & Auinger (1891, pl. 47, figs 1a–c). Hilber (1879) mentions two localities. Therefore, the illustrated specimen is a syntype. The specimen was stored in the collections of the paleontological Institute of the University of Graz ( Austria). This part of the collection was transferred to the Universalmuseum Joanneum in Graz in 2002. Currently, the specimen cannot be found and no additional topotypic material is available.

Type locality. Plirsch at St. Florian ( Austria), Styrian Basin .

Type stratum. Clayey silt of the Florian Formation.

Age. Early/middle Badenian (Langhian).

Etymology. In honor of Martin Gross (Universalmuseum Joanneum, Graz, Austria), in recognition of his contributions to the Miocene of the Styrian Basin.

Revised description. Shell medium-sized, solid, fusiform with high, conical spire. Protoconch not preserved. Teleoconch of nine whorls. Early teleoconch whorls weakly concave with two beaded adsutural spiral cords, separated by mid-portion bearing opisthocline axial riblets. On fifth whorl adsutural cords become more swollen, strongly rounded, and smooth, losing beaded sculpture, separated by broad, concave mid-portion bearing fine spiral cords. Suture narrowly but deeply impressed, linear. Last whorl ~57% of total height. Subsutural collar of medium width, rounded, well-developed. Subsutural ramp broad, concave, delimited by angular shoulder cord, weakly convex below. Base not delimited, weakly constricted. Siphonal fasciole weak. Sulpture of regular, narrow spiral cords separated by wider interspaces over base, cords of alternating strength over fasciole, crossed by close-set growth lines. Aperture wide, pyriform. Outer lip not thickened, with coarse lirae within. Anal sinus moderately wide, moderately deep, asymmetrically U-shaped, with apex mid-ramp. Siphonal canal incomplete. Columella moderately excavated in adapical third, straight below, twisted at fasciole, smooth. Columellar and parietal callus strongly thickened, sharply delimited from base, forming broad rim.

Discussion. Pleurotoma (Clavatula) auingeri Hilber, 1879 is a primary homonym of Pleurotoma auingeri Hoernes, 1875 (in Hoernes 1875a) (= Crassispira auingeri ). Therefore, we propose Perrona grossi as new name for Hilber’s species. Perrona grossi is reminiscent of Perrona ursulae ( Hoernes & Auinger, 1891) in general shape, but differs from it by its prominent shoulder and the much wider mid-whorl portion between the adsutural swellings.

Paleoenvironment. Inner neritic environments (own data).

Distribution in Central Paratethys. Badenian (middle Miocene): Styrian Basin: Plirsch at St. Florian, Pöls ( Austria) ( Hoernes & Auinger 1891).

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 39 A1–A2. Perrona grossi nov. nom., reproduction of lectotype from Hilber (1879), Plirsch at St. Florian (Austria).