Rissoina (Rissoina) pusilla ( Brocchi, 1814 )

TĂMAȘ A., TĂMAȘ D. M. & POPA M. V., 2013, Badenian Small Gastropods From Lăpugiu De Sus (Făget Basin, Romania). Rissoidae Family, Acta Palaeontologica Romaniae 9 (1), pp. 57-66 : 63-64

Rissoina (Rissoina) pusilla ( Brocchi, 1814)

Fig. 3f

1814 Turbo pusillus nob. – Brocchi, p. 181, pl. 6, fig. 5 1954 Rissoina pusilla Brocc. - Friedberg, p. 356, pl. 20, fig 22

1960 Rissoina (Rissoina) podolica Cossmann - Kojumdgieva & Strachimirov, p. 102, pl. 30, fig. 19

1960 Rissoina pusilla podolica Cossmann - Strausz, p. 79, pl. 12, fig. 23-28

part 1975 Risoina (Rissoina) podolica Cossmann - Bałuk, p. 90, pl. 10, fig. 11

1981 Rissoina (Rissoina) podolica Cossmann - Švagrovskỳ, p. 122, pl. 38, fig. 1-4

1981 Rissoina podolica Cossmann - Krach, p 51, pl. 15, fig. 25, 26, 34, 35

1993 Rissoina podolica Cossmann - Șuraru & Papp, pl. V, fig. 22

2004 Rissoina (Rissoina) pusilla (Brocchi) - Landau et al., p. 52, pl 12, fig. 1

Material: two specimens from Lp4 (one specimen PMBBU 23864 )

Description: Elongated, incompletely preserved shell; up to 5.25 mm in height and 2.5 mm in width, first whorls not included. Teleoconch with more than five flattened whorls and incised suture. Ornamentation consisting of fine axial ribs showing a straight orientation on the first whorls and a slightly sinusoidal one towards the last ones. There are 22 to 24 ribs on the last whorl. Numerous extremely fine spiral threads present in the interspaces between the axial rib areas. Three spiral threads are more prominent on the last-but-one supra-suture whorl and nine on the last whorl towards the base of the shell. Oval, siphonostome oblique aperture; umbilicus covered by labrum, the latter thickened due to the presence of a varix.

Distribution: identified in: Austria ( Kowalke & Harzhauser, 2004), Poland ( Friedberg, 1954; Bałuk, 1975; Krach, 1981), Slovacia (Švagrovskỳ, 1981), Hungary ( Strausz, 1966), Bulgaria ( Kojumdgieva and Strachimirov, 1960), Romania ( Șuraru and Papp, 1993).

Figures

Fig. 3 - a Alvania sp. b Manzonia (Manzonia) scalaris (Dubois, 1831). c Manzonia sp. d Rissoina (Phosinella) steinabrunnensis Sacco 1895. e Rissoina (Rissoina) vindobonensis Sacco, 1895. f Rissoina (Rissoina) pusilla (Brocchi, 1814).