New Spider Species Of Cnephalocotes And Peponocranium (Aranei, Linyphiidae) From The North-East Of Ukraine
Author
Gnelitsa, V. A.
text
Zoodiversity
2024
58
3
187
194
http://dx.doi.org/10.15407/zoo2024.03.187
journal article
10.15407/zoo2024.03.187
2707-7268
12520083
759B133C-ADC8-4D4B-B20B-94AB20242B4F
Peponocranium fallax
sp. n.
(
figs
11–13
,
16
,
17
)
urn:lsid:zoobank.org:act:
80522BBA-5C03-44C8-BE50-17DC2B3599CD
Material examined.
Holotype
}
:
Ukraine
,
Sumy Region
, Vakalivshchina village,
51.04° N
34.94° E
, grass meadow by the edge of mixed forest (
Quercus
,
Acer, Fraxinus
with
Pinus
), on the ground,
16.05.1992
(
V
. Gnelitsa) (
SIZK
).
Diagnosis. Female of the new species can be easy distinguished by the epigyne and vulva structure.
Description (
holotype
}
). Total length 1.82, carapace 0.8 long, 0.57 wide (
figs
13
,
16
), smooth and shining, no sulci, grey-brown-yellow, with grey frontal (head) part.
Posterior median eyes are 0.66 of their diameter apart.
Chelicerae: anterior margin with five teeth, proximal tooth stands apart of the rest four ones. Posterior margin with four tiny teeth gradually diminished distally, fine stridulating files are barely visible.
Sternum 0.45 long 0.43 wide, yellow, gradually turns into dark grey yellow to the margins, extends between coxae IV.
Figs
11–16
.
Peponocranium fallax
sp. n.
:
11
— epigyne ventrally;
12
— vulva ventrally;
13
— carapace laterally;
16
— carapace dorsally.
P. praeceps
(Ukraine, Vakalivshchina):
14
— epigyne ventrally,
15
— vulva ventrally.
Legs spination: Ti I–IV with one dorsal spine. Ti IV spine length (left/right) 1.52/1.81 of tibia diameter.
Position of Mt trichobothrium (left/right): I — 0.87/0.87, II — 0.90/0.88, III — 0.88/0.84, IV — 0.88/0.86.
Leg measurements given in
table 2
.
Epigyne: see
fig.
11
, vulva: see
figs
12
,
17
.
Abdomen grey, no dorsal pattern.
Male: unknown.
Etymology. The name means “fallacious” in Latin and is given due to similarity with
P. ludicrum
(O. Pickard-Cambridge, 1861)
that earlier caused a misidentification of this spider specimen (
Gnelitsa, 1993
,
1998
,
2001
).
Tabl e 2. Leg measurements of
P. fallax
sp. n.
(holotype)
| Legs |
Femur |
Patella |
Tibia |
Metatarsus |
Tarsus |
Sum |
| I |
0.58 |
0.22 |
0.50 |
0.42 |
0.25 |
1.97 |
| II |
0.56 |
0.23 |
0.49 |
0.42 |
0.25 |
1.95 |
| III |
0.52 |
0.21 |
0.41 |
0.42 |
0.24 |
1.80 |
| IV |
0.68 |
0.22 |
0.62 |
0.56 |
0.27 |
2.35 |
Figs
17–20
. Vulva, course of seminal ducts: 17 —
P. fallax
sp. n.
;
19 —
P. praeceps
(Ukraine, Vakalivshchina); diagrammatic course of seminal ducts:
18 —
P. fallax
sp. n.
,
20 —
P. praeceps
(Ukraine, Vakalivshchina).
The new species can be distinguished with the following key.
Key to species of the genus
Peponocranium
occurring in
Ukraine
(females)
1. Receptacles of the epigyne are directed obliquely out and frontally. ...................................
P. fallax
sp. n.
– Receptacles are directed frontally and convergent. ........................................................................................ 2
2. Laminae of the vulva directed frontally and convergent; carapace is pale coloured .........
P. orbiculatum
– Laminae directed to each other; carapace is brown.......................................................................
P. praeceps