Revision of the stygobiont gastropod genera Plagigeyeria Tomlin, 1930 and Travunijana Grego & Glöer, 2019 (Mollusca; Gastropoda; Moitessieriidae and Hydrobiidae) in Hercegovina and adjacent regions
Author
Grego, Jozef
44C83AAB-CF4E-46E8-8146-DFBADA150AB6
Horná Mičiná, SK- 97401 Banská Bystrica, Slovakia.
jozef.grego@gmail.com
text
European Journal of Taxonomy
2020
2020-07-27
691
1
56
journal article
21415
10.5852/ejt.2020.691
918d86bb-f11d-414e-9c1e-21ec17737792
3961840
CC8487E0-169D-4B32-A2AB-F9B34DFB3F3B
Plagigeyeria angyaldorkae
sp. nov.
urn:lsid:zoobank.org:act:
6BC5A082-0F63-4116-92B3-3BD320D5D1FA
Fig. 12E
Type material
Holotype
BOSNIA
AND HERCEGOVINA •
West Herzegovina Canton
,
Tihaljina District
,
Lukende
,
Jakšenica Village
, “Vrelo Jakšenica” (
Fig. 3F
);
43.322897° N
,
17.373026° E
;
173 m
a.s.l.
;
2 Apr. 2018
;
J. Grego
,
D. Angyal
,
G. Jakab
and
M. Olšavský
leg.; HNHM-MOLL-104163.
Table 3.
Shell morphometry comparison of
Plagigeyeria jakabi
sp. nov.
,
P. angyaldorkae
sp. nov.
and
P. vriosticaensis
sp. nov.
|
Species
|
Specimen
|
H
mm
|
W
mm
|
BH
mm
|
BW
mm
|
AH
mm
|
AW
mm
|
CA
°
|
H/W
|
AH / AW
|
W / BW
|
H/ BH
|
H/ AH
|
W / AW
|
H/(W- BW)
|
|
Plagigeyeria jakabi
sp. nov.
|
Holotype HNHM 104172 |
2,52 |
1,58 |
1,45 |
1,14 |
1,17 |
1,00 |
42 |
1,59 |
1,17 |
1,39 |
1,74 |
2,15 |
1,58 |
5,73 |
|
Plagigeyeria jakabi
sp. nov.
|
Paratype JG F1204 |
2,45 |
1,40 |
1,45 |
1,14 |
1,13 |
1,07 |
41 |
1,75 |
1,06 |
1,23 |
1,69 |
2,17 |
1,31 |
9,42 |
|
Plagigeyeria angyaldorkae
sp. nov.
|
Holotype HNHM 104163 |
3,07 |
1,86 |
1,45 |
1,31 |
1,21 |
1,21 |
48 |
1,65 |
1,00 |
1,42 |
2,12 |
2,54 |
1,54 |
5,58 |
|
Plagigeyeria vriosticaensis
sp. nov.
|
Holotype HNHM 100174 |
2,82 |
1,76 |
1,66 |
1,31 |
1,21 |
1,17 |
41 |
1,60 |
1,03 |
1,34 |
1,70 |
2,33 |
1,50 |
6,27 |
|
Plagigeyeria
|
Paratype |
3,00 |
1,45 |
1,72 |
1,28 |
1,24 |
1,28 |
49 |
2,07 |
0,97 |
1,13 |
1,74 |
2,42 |
1,13 |
17,65 |
|
vriosticaensis
sp. nov.
|
HNHM 104182 |
Dimensions
Holotype
: H
3.07 mm
;
W
1.86
mm; BH
1.45 mm
; BW
1.31 mm
; AH
1.21 mm
; AW
1.21 mm
.
Etymology
Named after my friend Dorottya Angyal from the
Budapest
Natural History Museum, who substantially helped with the samplings during our field trip.
Description
Solid, elongate-conical shell, 3.1 mm-high, with 5.5 regularly tapering narrow inflated whorls, deep suture and blunt rounded apex, milky-white colour and fine regular sinuated axial ribs. Late protoconch faintly irregularly spirally ribbed. Umbilicus open, obscured by the outward reflexed flaring columellar margin. Expanding reflexed aperture with irregular elongate-oval shape and a slightly depressed and inward-bent labral margin. The upper labral margin is elongate-flaring. Labral lateral profile protruded and bent backward at the body whorl, columellar margin profile sinuated. Expanded upper tip of aperture is conspicuously protruded, flaring against the frontal shell profile.
Differentiating features
P. angyaldorkae
sp. nov.
differs from all other known species of the region by its elongate-conical shell shape with 6 whorls, by more convex whorls and proportionally smaller body whorls and by a characteristically elongated labrally depressed aperture with a slightly depressed labral margin. From
Lanzaia ephantota
(Megerle von Mühlfeld, 1824)
it differs by larger more elongate shell wit finer, more close-set ribbs and more depressed aperture. Shell morphometry comparison with the related species is presented in the
Table 3
.
Habitat
The empty shell of this subterranean species was washed out by a middle-sized karst spring (
173 m
a.s.l.) rising from a 1.5 m-broad limestone crack among houses in the village. The strong stream flows under the main road, depositing the sand at a pond just before the old watermill ruins. The spring is likely getting its water from sinkholes north of village Drinovci (
245 m
a.s.l.) in Imotsko Polje.
Fig. 12. A–B
.
Plagigeyeria jakabi
sp. nov.
, Studenci, spring Guljevina
A
. Holotype (HNHM- MOLL-104172).
B
. Paratype (JG F1204).
C–D
.
P. vriosticaensis
sp. nov.
, Vitina, Vrelo Vrioštica
C
. Holotype (HNHM-MOLL-104182).
D
. Paratype (JG F1214).
E
.
P. angyaldorkae
sp. nov.
, Vrelo Jakšenica (holotype HNHM-MOLL- 104163).
F
.
P. ozimeci
sp. nov.
, Vitina, Vrelo Vrioštica, holotype (HNHM-MOLL-104173).
G–K
.
P. ozimeci
sp. nov.
, Vitina, Vrelo Vrioštica, paratypes (JG F1215).
Distribution
Only known from the
type
locality