Alvania (Alvania) ampulla ( Eichwald, 1853 )

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 : 60-61

Alvania (Alvania) ampulla ( Eichwald, 1853)

Fig. 2g

1853 Riss. ampulla m. - Eichwald, p. 274

1954 Alvania montagui var. ampulla Eichw. - Friedberg, p. 376, pl. 22, fig 12

1966 Rissoa (Alvania) montagui miocaenica Sacco - Strausz, p. 74, pl. 46, fig. 19, 20

1971 Alvania (Alvania) montagui ampulla (Eichwald) - Rado, pl. 4, fig. 70, 86

1975 Alvania (Alvania) montagui ampulla (Eichwald) - Bałuk, p. 79, pl. 9, fig. 9

1981 Alvania montagui ampulla (Eichwald) - Krach, p. 49, pl. 15, fig. 13-15

2000 Alvania (Alvania) montagui ampulla (Eichwald) - Popa and Ianoliu, p. 84, pl. 2, fig. 5

2004 Alvania (Alvania) ampulla (Eichwald) - Kowalke and Harzhauser, p. 119, fig. 6D

Material: 44 specimens, 19 from L5, 11 from Lp2 and 14 Lp10 (one specimen PMBBU 23856 )

Description: Conical shell with 5-6 whorls; up to 2.25 mm in height and 1.37 mm in width. In adult specimens, the protoconch is only partly preserved; juvenile specimens show protoconch with two convex whorls ornamented with fine spiral threads. Teleoconch with slightly convex whorls and canaliculate suture. The last whorl is about 70% of the total shell height. It is ornamented with more-pronounced 16-20 axial ribs intersected by 6 spiral threads. Towards the base, additional 3-4 spiral threads. Oval aperture, slightly sharper towards the top. The inner lip partly covers the umbilicus while the external one shows inner denticles and external varix.

Distribution: identified in Austria ( Kowalke and Harzhauser, 2004), Poland ( Friedberg, 1954; Bałuk, 1975; Krach, 1981), Hungary ( Strausz, 1966), Romania ( Rado, 1971; Popa and Ianoliu, 2000).

Figures

Fig. 2 - a Rissoa acuticosta (Sacco, 1895). b Rissoa clotho Hörnes, 1856. c Rissoa costeiensis Kowalke & Harzhauser, 2004. d Alvania (Alvania) oceani (d'Orbigny, 1852). e Alvania (Alvania) productilis Boettger, 1906. f Alvania (Alvania) perregularis (Sacco, 1895). g Alvania (Alvania) ampulla (Eichwald, 1853). h Alvania (Alvania) helenae Boettger, 1901. i Alvania (Alvania) transiens (Sacco, 1895).