Euspira styriaca ( Bauer, 1900 ), 2025

Harzhauser, Mathias, Landau, Bernard M. & Guzhov, Aleksandr, 2025, The Naticidae (Gastropoda, Naticoidea) of the Miocene Paratethys Sea- unraveling 160 years of species lumping, Zootaxa 5703 (1), pp. 1-120 : 71-72

publication ID	https://doi.org/10.11646/zootaxa.5703.1.1
publication LSID	lsid:zoobank.org:pub:78B0FE76-1698-4FA0-99B3-661DBB27DFF6
persistent identifier	https://treatment.plazi.org/id/03A687A6-6048-FFBC-FF00-F935FF6EFD3E
treatment provided by	Plazi
scientific name	Euspira styriaca ( Bauer, 1900 )
status	comb. nov.

Treatment

Euspira styriaca ( Bauer, 1900) nov. comb.

Figs 45B View FIGURE 45 1 –B View FIGURE 1 4 View FIGURE 4

* Natica helicina Brocc. var. Styriaca Bau.— Bauer 1900: pl. 1, fig. 13.

Type material. Holotype: Universalmuseum Joanneum, Graz, UMJG&P 5560, SL. 17.3 mm, MD: 15.8 mm, St. Florian ( Austria), illustrated in Bauer (1900: pl. 1, fig. 13), Figs 45B View FIGURE 45 1 –B View FIGURE 1 4 View FIGURE 4 .

Revised description. Small, globose-ovate shell of about four teleoconch whorls; only slightly higher than wide ( SL /MD = ~1.1). Protoconch not preserved. Spire elevated, conical, with strongly convex whorls; apical angle ~115°. Suture linear, adpressed. Teleoconch whorls with narrow, subsutural shelf; faint, rounded shoulder. Last whorl weakly expanding, regularly convex, attaining ~92% of total height. Periphery just below mid-whorl (~48%). Growth lines delicate, prosocline. Aperture moderately wide, ovate, prosocline. Position of adapical tip of aperture moderately high (~81%), above mid-whorl, distinctly below shoulder. Aperture attaining ~78% of total height. Columellar lip weakly reinforced, basal lip and outer lip not preserved. Columellar angle ~15°. Presence of opercular ridge unknown. Umbilicus moderately narrow (~13%), deep, funnel-shaped. Parietal callus long (~52%), weakly thickened, not expanding over base, with concave margin. Anterior lobe of parietal callus thin, trigonal, fused with narrow, trigonal umbilical callus. Funicle subobsolete, very broad, low. Basal fasciole broad, solid, weakly angled close to aperture. Color pattern not preserved.

Discussion. This is a poorly known species documented from a single specimen. Euspira moravica nov. sp. and Euspira vinitor nov. sp., are superficially similar but differ in their larger size and the much narrower umbilicus. Euspira protracta ( Eichwald, 1830) has comparable umbilical features but differs distinctly in its high spire and elongate-ovate outline.

Paleoenvironment. Shallow marine, inner neritic.

Distribution in Central Paratethys. Badenian (Middle Miocene): Styrian Basin: St. Florian ( Austria) ( Bauer 1900).