Tethyspollia beregovi

Harzhauser, Mathias & Landau, Bernard M., 2024, The Colubrariidae, Eosiphonidae, Melongenidae, Pisaniidae, Prodotiidae and Tudiclidae (Gastropoda, Buccinoidea) of the Miocene Paratethys Sea, Zootaxa 5427 (1), pp. 1-110 : 56-57

Tethyspollia beregovi (Kojumdgieva in Kojumdgieva & Strachimirov, 1960)

Figs 29A 1 –A 2

* Cantharus (Pollia) beregovi n. sp. —Kojumdgieva in Kojumdgieva & Strachimirov 1960: 173, pl. 43, figs 16a–b.

Type material. Holotype: specimen illustrated in Kojumdgieva in Kojumdgieva & Strachimirov 1960: 173, pl. 43, figs 16a–b, SL: 22 mm, MD: 11 mm, Târnene ( Bulgaria), Badenian (Middle Miocene). We are not aware of the whereabouts of the type material.

Revised description. Small, moderately slender fusiform shell of five teleoconch whorls; apical angle 50°. Protoconch unknown. Teleoconch whorls convex with deeply incised suture. Prominent axial ribs separated by wide interspaces overrun by three prominent spiral cords. Last whorl attaining 65% of total height, with eight prosocline, wide-spaced axial ribs overrun by ten widely spaced spiral cords, with fine secondary threads intercalated. Aperture moderately narrow. Columella weakly excavated in upper half, with three prominent denticles. Anal canal very wide without parietal or anal denticle. Outer lip thickened by terminal varix with five very prominent denticles, upper three strongest forming weak palatal swelling, abapically slightly decreasing in size. Adapical denticle some considerably distance from anal canal. Siphonal canal moderately long, straight.

Discussion. Our description refers to the illustration in Kojumdgieva in Kojumdgieva & Strachimirov (1960), which has rather low resolution. The species is characterized by its peculiar aperture which lacks parietal and anal denticles and bears very large denticles in the outer lip. Kojumdgieva in Kojumdgieva & Strachimirov (1960) already recognized its close relationship to ‘ Pollia ’ mariae Hoernes & Auinger, 1890 , but placed both species in Cantharus Röding, 1798 . Cantharus species, however, differ from Tethyspollia in their shouldered whorls, and much weaker lirae within the outer lip as opposed to stout denticles.

Tethyspollia beregovi (Kojumdgieva in Kojumdgieva & Strachimirov, 1960) differs from Tethyspollia mariae (Hoernes & Auinger, 1890) in its higher spire, more convex spire whorls and wider spaced axial ribs.

Paleoenvironment. Unknown.

Distribution in Central Paratethys. Badenian (Middle Miocene): Dacian Basin: Târnene ( Bulgaria) (Kojumdgieva in Kojumdgieva & Strachimirov 1960).

Figures

FIGURE 1. Measurements for shell morphology; AA: apical angle, SL: shell length, MD: maximum diameter, LWH: last whorl height, AH: aperture height, AL: aperture length, AW: aperture width.

FIGURE 2. Colubraria subobscura (Hoernes & Auinger, 1884). A1–A3. NHMW 1854/0035/0170, paralectotype, Lăpugiu de Sus (Romania). B1–B2. NHMW 1859/0037/0018a, paralectotype, Lăpugiu de Sus (Romania). C1–C3. NHMW 1865/0001/0183, paralectotype, Lăpugiu de Sus (Romania). D1–D2. NHMW 1859/0037/0018b, paralectotype, Lăpugiu de Sus (Romania). E1–E3. NHMW 1874/0025/0021, lectotype, Lăpugiu de Sus (Romania). F1–F2. NHMW 2023/0338/0001, paralectotype, Lăpugiu de Sus (Romania).

FIGURE 29. A1–A2. Tethyspollia beregovi (Kojumdgieva in Kojumdgieva & Strachimirov, 1960), holotype, re-illustrated from Kojumdgieva in Kojumdgieva & Strachimirov (1960).