Two new species of the genusBythinella Moquin-Tandon, 1856 (Mollusca: Gastropoda: Hydrobiidae) from the Western Balkan Peninsula)
Author
Glöer, Peter
Biodiversity Research Laboratory, Schulstr. 3, D- 25491 Hetlingen, Germany. E-mail: gloeer @ malaco. de.
Author
Pešić, Vladimir
text
Ecologica Montenegrina
2014
2014-12-20
1
4
249
255
journal article
2336-9744
urn:lsid:zoobank.org:pub:724A7D13-BF8C-4643-91BD-44B9BB2ADE45
Bythinella marici
n. sp.
(
Figs. 7 10
)
Type series.
Holotype
(
ZMH 79884
): Shell height
3.5 mm
, shell width
2.1 mm
;
Bosnia
and Hercegovina, Grahovsko Polje,
Bosansko Grahovo town
,
River Korana
near village Luka, leg.
Marić.
Paratypes
(
ZMH 79885
)
:
6 ex.
;
6 ex.
coll. Glöer,
same data and locality as
holotype
.
Locus typicus.
Bosnia
and
Hercegovina
,
Grahovsko Polje
,
Bosansko Grahovo town
,
River Korana
near village
Luka
,
44° 9'41.07"N
,
16°23'14.82"E
.
Etymology.
Named after Prof dr Drago Marić (Department of Biology, Podgorica), collector of the new species, in appreciation of his studies on Montenegrian biodiversity.
Figures 7 10
.
Bythinella marici
n. sp.
:
7
shell (holotype),
8
shell (paratype),
9
penis in situ,
10
penis with flagellum.
Description
Shell.
The large shell is whitish and cylindrical. The 4.5 whorls are convex with a very deep suture. The surface is silky and finely striated. The apex is obtuse, the umbilicus is slitlike. The aperture is oval. Shell height
3.3 3.5 mm
, width 2.0
2.1 mm
mm, height aperture/shell ratio 0.43.
Soft body.
The mantle is black with a greyish boarder, the head is whitish.The penis is shorter than the penial appendix. The flagellum is long, thin at the proximal end and broad at the distal end.
Differentiating features
. It is one of the largest species of this genus in the Balkan Peninsula. Only two
Bythinella
species
from the Gacko polje, a karstic field (= polje) in
Croatia
, are larger:
B. magna
Radoman 1976
, with a shell height of 4.55 5.21 (
Radoman 1983: 209
) and
B. kapelana
Radoman 1976
with a shell height of 4.33 4.70. In addition to the dimensions, these species differ in the shape of aperture: in
B. magna
the aperture is a relatively low (height aperture/shell ratio 0.38, data taken from
Radoman 1983
) while in
B. kapelana
aperture is nearly elliptical.
Distribution
.
Bosnia
and Hercegovina; known only from the
type
locality (
Fig. 14
).