Alvania ( Alvania ) productilis Boettger, 1906

Alvania ( Alvania) productilis Boettger, 1906 View in CoL

Fig. 2e View Fig

1906 Alvania ( Alvania) productilis n. sp. - Boettger, p. 156, nr. 539

1934 Alvania ( Alvania) productilis Boettger - Zilch, p. 212, pl. 5, fig. 83

1975 Alvania ( Alvania) productilis Boettger - Bałuk, p. 81, pl. 9, fig. 6

1981 Alvania ( Alvania) productilis (Boettger) - Švagrovskỳ, p.117, pl. 36, fig. 6, 7

Material: two specimens from L5 ( one specimen PMBBU 23854 )

Description: Conical shell consisting of five whorls, up to 2.10 mm in height and 1.25 mm in width.

Protoconch consists of two convex whorls ornamented with spiral threads; the transition to the teleoconch is not well noticeable. Teleoconch with convex whorls and a well-defined suture. On the first whorl there are 20 axial ribs intersected by four spiral threads. The last whorl represents about 70% of the total shell height; it is ornamented with 20 axial ribs intersected by spiral threads. The base is ornamented with four spiral threads. The aperture is drop-like. The inner lip covers the umbilicus, while the external none is thickened due to a varix; it presents inner denticles.

Distribution: identified in Poland ( Bałuk, 1975), Slovacia (Švagrovskỳ, 1981), Romania (Boettger, 1906; Zilch, 1934)