Cerithidium schwartzi ( Hörnes, 1855 )

Cerithidium schwartzi ( Hörnes, 1855) View in CoL

Figs 26C–E View FIGURE 26

* Cerithium Schwartzi Hörn.— Hörnes 1855: 412 View in CoL , pl. 42, fig. 18.

Seila Schwartzi Hoern.— Friedberg 1914: 313 , pl. 18, fig. 26.

Seila schwartzi M. Hörnes — Csepreghy-Meznerics 1954: 23.

Seila (Seila) schwartzi (M. Hörnes) — Švagrovský 1954: 37, pl. 4, figs. 10–13, 15, 16.

S [eila] (S [eila].) schwartzi (Hörn.) — Sieber 1958: 137.

Seila schwartzi Hörnes, 1856 — Strausz 1966: 168, pl. 5, fig. 25.

Seila schwartzi (M. Hoernes, 1856) — Zelinskaya et al. 1968: 165: pl. 40, figs 17–18.

Seila schwartzi (Hoern.) — Urbaniak 1974: 38, pl. 5, fig. 1 [non pl. 3, fig. 15 = Bittium sp. ].

Bittium schwartzi (M. Hoernes, 1856) — Tomašových 1998: 376, pl. 4, figs 1–3.

non Seila (Seila) Schwartzi (Hörn. M.) — Sieber 1937: 506, pl. 25, fig. B3 [= Bittium turritella ( Eichwald, 1851) ].

non Cerithidium schwartzi (Hörnes, 1856) View in CoL — Moroni & Ruggieri 1988: 136, pl. 1, figs 6–9, text-fig. 1 [= Cerithidium View in CoL sp. nov.].

Type material. Lectotype (designated herein): NHMW 1865 View Materials /0001/0575, SL: 3.0 mm, MD: 1.0 mm, Steinebrunn ( Austria), Figs 26C View FIGURE 26 1 –C View FIGURE 1 3 View FIGURE 3 . Paralectotypes: NHMW 1855 View Materials /0002/0094, SL: 3.0 mm, MD: 1.1 mm, Steinebrunn ( Austria), probably illustrated in Hörnes (1855, pl. 42, fig. 18), Figs 26D View FIGURE 26 1 –D View FIGURE 1 2 View FIGURE 2 . NHMW 1855 View Materials /0002/0094, SL: 2.7 mm, MD: 1.1 mm, Steinebrunn ( Austria), Figs 26E View FIGURE 26 .

Revised description. Small sized, slender conical shell of up to seven teleoconch whorls, attaining ~ 3 mm in height; apical angle ~27–29°. Protoconch low conical of 2.5 convex whorls (dp = 230 μm). First teleoconch whorl with moderately wide subsutural ramp and two prominent spiral cords. Third spiral cord appears at subsutural ramp on second or third teleoconch whorl. Later teleoconch whorls moderately convex with weak shoulder, with deeply incised, linear to weakly undulating suture. Sculpture of three prominent spiral cords with most prominent cord at periphery; two additional secondary cords on subsutural ramp. Axial sculpture weak consisting of indistinct, broad varices on last two spire whorls. Last whorl attaining 40% of total height, with prominent dorsal varix and slightly weaker terminal varix. One or two weaker intervarical ribs may occur. Last whorl moderately convex with steep subsutural ramp, weakly convex periphery, moderately constricted base with prominent spiral cords. Aperture ovate, relatively small. Columella weakly excavated. Columellar callus forming narrow rim. Anal canal indistinct. Siphonal canal distinct, narrowly incised, short. Outer lip thickened by terminal varix.

Discussion. Cerithidium schwartzi is a rare species, which is reminiscent of the extant Mediterranean Cerithidium submammillatum (de Rayneval & Ponzi, 1854) , which differs especially in its more prominent axial sculpture. Specimens from the Messinian (Late Miocene) of Palermo ( Italy), identified as this species by Moroni & Ruggieri (1988) differ from Paratethyan shells in their comparatively stout outline and more delicate and uniform spiral cords, more convex last whorl and weaker varix. The Italian specimens represent a yet undescribed species. The coeval Eastern Paratethyan Cerithidium iljinae sp. nov. differs in its prominent axial sculpture.

Paleoenvironment. The occurrence at Steinebrunn ( Austria) suggests shallow marine environments with seagrass (own data M.H.).

Distribution in Central Paratethys. Badenian (Middle Miocene): Nowy Sącz Basin: Niskowa ( Poland) (Friedberg 1938); Wieliczka ( Poland) (Friedberg 1938); Voronyaky Hills: Pidhirtsi ( Ukraine) (Friedberg 1938); Polish-Ukrainian Fore-Carpathian Basin: Jasionów, Shushkivtsi, Zboriv, Zhukivtsi ( Ukraine) (Friedberg 1938); Tarnów ( Poland) ( Urbaniak 1974); Vienna Basin: Steinebrunn ( Austria) ( Sieber 1937); Devínska Nová Ves ( Slovakia) ( Tomašových 1998); Eisenstadt-Sopron Basin: Forchtenau ( Austria) ( Sieber 1937); Pannonian Basin: Letkés, Mátraverebély, Szob ( Hungary) ( Strausz 1966).