Sthenorytis sp.

Sthenorytis sp.

Figs 44B View FIGURE 44 1 –B View FIGURE 1 2 View FIGURE 2

Sthenorytis (Sthenorytis) sp. nov. — Strausz 1925: 216.

Sthenorytis (Sthenorytis) aff. retusa paucicostata Sacco, 1904 — Strausz 1966: 176, fig. 74.

Material. One fragmentary specimen, MD: 24 mm, Somlyó-hegy at Fót ( Hungary), illustrated in Strausz (1966: fig. 74). We have not been able to trace the specimen, Figs 44B View FIGURE 44 1 –B View FIGURE 1 2 View FIGURE 2 (re-illustrated from Strausz 1966).

Discussion. Strausz (1966) provided a very schematic drawing depicting a fragment of a large shell comprising a stout, last whorl with rounded shoulder and broadly conical base, characterized by its sculpture of five extremely broad varices (including the terminal varix at the aperture) separated by slightly narrower interspaces with spiral threads. Strausz (1966) compared this specimen with Sthenorytis paucicostata Sacco, 1904 (= Sthenorytis acutispina ( Sacco, 1891) , from the Langhian of the Monte die Cappuccini ( Italy) (see Sacco 1904: pl. 23, fig. 19). The Hungarian species, however, has little in common with Sthenorytis acutispina and differs in the low number of extremely broad varices. It surely represents a yet undescribed species.

Paleoenvironment. Unknown.

Distribution in Central Paratethys. Karpatian (Early Miocene): Pannonian Basin: Somlyó-hegy at Fót ( Hungary) ( Strausz 1966).

Genus Subuliscala de Boury, 1909

Type species. Scalaria banoni Tournouër, 1874 View in CoL ; original designation by de Boury (1909a: 257). Early Miocene, France.

Diagnosis. “ Shell not very thick . Size below average; shape narrow, subulate; spire long, unstaggered, acute at the apex; whorls convex, elevated, separated by deep, but not disjointed sutures; lamellae short, oblique, flattened, sometimes a little thicker or subvaricose, connecting from one whorl to the other at the bottom of the sutures; in their intervals, very fine spiral striae, can be distinguished - under very high magnification. Last whorl slightly more than a quarter of the total height, oval-round, with imperforate base, bearing no trace of disc or basal cord, only a narrow bead against the columellar rim. Aperture oval-round, slightly angular posteriorly, without anterior auricle; peristome thin, not externally reflected, almost exclusively formed by the inner layer which is thinned, though continuous, on the parietal region; peristome oblique, weakly bordered by a varicose rib.” (translated from Cossmann 1912: 43–44).

Discussion. The genus is represented in the Paratethys by two morphotypes (slender turreted versus slender conical with large last whorl), which are also represented by the two species from the Burdigalian of France, Subuliscala banoni ( Tournouër, 1874) and Subuliscala lagusensis (de Boury in Cossmann, 1912), without being conspecific with these.

Subuliscala is reminiscent of Adiscoacrilla Sacco, 1890 , which differs in its more prominent, more raised lamellae and its more distinct basal angulation. Acrilla H. Adams, 1860 [type species Scalaria acuminata G.B. Sowerby II, 1844 ; present-day, Indo-West Pacific] differs from Subuliscala in its marked basal angulation, delimiting a wide basal disc, and its axial sculpture is formed by numerous, close-set ribs rather than by lamellae.