Barbotella intermedia (Radovanovic et Pavlovic, 1893)

Frolov, Pavel D., Danukalova, Guzel A. & Osipova, Eugenia M., 2018, Late Miocene molluscs of the Morskaya 2 site (Azov Sea region, Russia), Palaeontologia Electronica (a 20) 23 (1), pp. 1-32 : 7-9

Barbotella intermedia (Radovanović and Pavlović,

1893)

Figure 8.7

1892 Turbo barboti Toula, p. 435, pl. 4, fig 14.

1893 Turbo hÖrnesi var. intermedius Radovanović and Pavlović , p. 128, pl. 1, fig. 5.

1930 Trochus omaliusii var. intermedia (Radovanović and Pavlović) ; Kolesnikov, p. 63, pl. 4, figs. 102-106.

1932 Trochus omaliusii var. intermedia (Radovanović and Pavlović) ; Davitashvili, p. 58, pl. 8, figs. 16-19.

1935 Barbotella intermedia (Radovanović and Pavlović) ; Kolesnikov, p. 207, pl. 26, figs.

21-22.

1974 Barbotella intermedia (Radovanović and Pavlović) ; Volkova, p. 80, pl. 24, fig. 9a, b.

Material. 2 complete specimens and 4 fragments from layer 3.

Description. The shell is round-triangular in shape (HS is 34.1 mm; WS is 26.1-30.1 mm, average 28.1; WS/HS average is 0.9), consists of 5-6 rounded whorls, separated by a shallow suture. Convex, thick ribs are observed on the shell surface. The last whorl is bulbous (HLW/HS is 0.95). Spire is high and has a cone form, consisting of convex whorls. Umbilicus is closed by the inner edge of aperture. Aperture is rounded, large, pointed in the upper part (HA is 15.4-17.2 mm, average 16.2; WA is 13.4-14.0 mm, average 13.7; WA/HA is 0.8-0.9, average 0.85) and is about 1/2 of the total shell height (HA/HS is 0.5). Aperture edges are thickened. Spiral growth lines that coincide with ribs are visible on the shell surface.

Remarks. This species was described by Toula (1892) as Turbo barboti , but he also used the same name for almost smooth forms from Bulgaria in 1877. As a result, Kolesnikov (1935) used the name “intermedia ” for ribbed forms, proposed earlier by Radovanović and Pavlović (1893).

Region of distribution and age. Sarmatian of the Eastern Paratethys (O. Anistratenko and V. Anistratenko, 2012).

Figures

FIGURE 8. Assemblage of the redeposited Miocene marine and terrestrial molluscs. 1, Dorsanum sp. 2, Gibbula (Gibbula) pseudoangulata (Sinzov, 1875). 3, Anisus cf. spirorbis (Linnaeus, 1758). 4, Blinia cf. angulata (d’Orbigny, 1844). 5, Cardiidae indet. (cf. Obsoletiformes). 6, Cardiidae indet. 7, Barbotella intermedia (Radovanović et Pavlović, 1893).