Cochlis kostejana ( Boettger, 1902 ), 2025

Cochlis kostejana ( Boettger, 1902) nov. comb.

Figs 9D View FIGURE 9 1 –D View FIGURE 1 4 View FIGURE 4

* Natica ( Naticina) kostejana n. sp. — Boettger 1902: 82.

Natica ( Naticina) kostejana Bttgr.— Boettger 1906: 90 .

Polynices ( Naticina) kostejana (Boettger) — Zilch 1934: 249, pl. 14, fig. 68.

Type material. Lectotype (designated by Zilch 1934: 249), SFM 366940 (= XII 2346 a), SL: 7.0 mm, MD: 6.6 mm, Coşteiu de Sus ( Romania), illustrated in Zilch (1934: pl. 14, fig. 68), Figs 9D View FIGURE 9 1 –D View FIGURE 1 4 View FIGURE 4 .

Revised description. Very small, very solid, globose shell of about 3.5 teleoconch whorls; nearly as wide as high ( SL /MD = ~1.0–1.1). Spire low conical, with convex whorls; apical angle 125°. Protoconch of ~1.75 smooth, convex whorls. Suture linear, narrow, incised. Last teleoconch whorl with narrow, weakly convex subsutural shelf, delimited by faint shoulder angulation. Last whorl moderately expanding, attaining 95% of total height. Periphery regularly convex, placed mid-whorl (~50%). Growth lines very prominent, regularly spaced, and weakly prosocyrt in apical view close to adapical suture, rapidly weakening towards periphery. Aperture moderately wide, D-shaped. Position of adapical tip of aperture high (~85%), distinctly above mid-whorl, slightly below shoulder. Aperture attaining 80% of total height. Columellar lip reinforced, basal lip slightly expanded into short spout, outer lip thick. Columellar angle ~25°. Opercular ridge not developed. Umbilicus moderately narrow (~12%), deep, with moderate growth lines. Parietal callus very long (~70%), moderately narrow, thickened with slight adapical swelling, with concave margin. Anterior lobe thin, fused with narrow umbilical callus. Insignificant funicle. Abapical sulcus narrow, abapically delimited by faint spiral ridge. Basal fasciole solid, rounded to weakly angled. Color pattern of large, close set blotches, intense under UV light. Operculum unknown.

Discussion. This species is poorly understood. It is peculiar in showing features of fully adult growth (thick shell, thickened outer lip, spout-like basal lip, thickened columellar callus) at a very small size for the genus. However, more would be necessary to understand the intraspecific variability: it is possible that this species was based on a dwarfed specimen. Cochlis micromillepunctata nov. sp. is thinner shelled and has a prominent, cord-like funicle. Cochlis neoobscura nov. sp. has comparable umbilical features but is much larger at same growth stage and lacks the prominent growth lines. More material will be needed to better characterize this species.

Paleoenvironment. Unknown.

Distribution in Central Paratethys. Badenian (Middle Miocene): Făget Basin: Coşteiu de Sus ( Romania) ( Boettger, 1902).