Badenian Small Gastropods From Lăpugiu De Sus (Făget Basin, Romania). Rissoidae Family
Author
TĂMAȘ A.
Author
TĂMAȘ D. M.
Author
POPA M. V.
text
Acta Palaeontologica Romaniae
2013
9
1
57
66
journal article
10.5281/zenodo.13189681
1842-371x
13189681
Alvania
(
Alvania
)
oceani
(
d'Orbigny, 1852
)
Fig. 2d
1852
Rissoa oceani
d’Orb.
- d’Orbigny, p. 29, nr. 368 1954
Alvania oceani
d'Orb.
- Friedberg, p. 377, pl. 22, fig. 13
1975
Alvania
(
Alvania
)
oceani
(d'Orbigny)
- Bałuk, p. 82, pl. 9, fig. 17
1981
Alvania oceani
d'Orbigny
- Krach, p. 49, pl. 15, fig. 1
2004
Alvania
(
Alvania
)
oceani
(d'Orbigny)
- Kowalke and Harzhauser, p. 120, fig. 7A.
Material:
two specimens
,
one from L5 and one from Lp2 (
one specimen
PMBBU 23859
)
Description: Elongated conical shell with five whorls; up to
2.7 mm
in height and
1.40 mm
in width. The protoconch is only partly preserved, as more than 2 convex whorls. Ornamentation is not visible under the stereomicroscope. Teleoconch with flattened first whorls and a last convex whorl with canaliculate suture. Ornamentation consisting of rounded axial ribs intersected by finer spiral threads; the latter become more pronounced towards the base of the shell. The last whorl represents about 65% of the total shell height. It is ornamented with 21 axial ribs intersected by 8 spiral threads. The shell base is covered by 5 spiral threads. Drop-like aperture, with inner lip covering the umbilicus and external lip showing inner denticles. Varices are present on the last-but-one whorl and in the aperture area. Distribution: identified in
Austria
(
Kowalke and Harzhauser, 2004
),
Poland
(
Friedberg, 1954
;
Bałuk, 1975
;
Krach, 1981
).