On some new or rare spider species from Lesbos, Greece (Araneae: Agelenidae, Amaurobiidae, Corinnidae, Gnaphosidae, Liocranidae)
Author
Robert Bosmans
text
Arachnologische Mitteilungen
2011
2011-01-10
40
1
15
22
journal article
32813
10.5431/aramit4003
1c378233-1a46-406d-8343-a1a6cf6fc028
814865
Amaurobius lesbius
sp. nov.
(
Figs. 6-10
)
Type material:
Holotype
male
,
1
paratype
male
two
paratype
females
from
Greece
,
Lesbos
,
Nomos Kalloni
,
Skalochori
(
N 39°15’59”
E26° 05’ 30”
),
300 m
, litter in
Querem
forest,
2.X.2007
,
R. Bosmans
&
J. Van Keer
leg. Deposited in
KBIN
.
Etymology:
The species is named after the island of Lesbos.
Diagnosis
:
Amaurobius lesbius
n. sp.
is closely related to the larger
A
erberi
(Keyserling)
, also occurring on Lesbos. Males differ by the reduction of an intermediate apophysis in the palpal tibia, and the presence of a strongly protruding, rectangular tegular process. Females differ by the closely set spermathecae, separated by less than 1/4 their diameter in the new species and by their diameter in
A. erberi
.
.
Table 3
:
Amauroblus lesbius
sp. nov.
, leg measurements (holotype).
| Fe |
Pt |
Ti |
Mt |
Ta |
| Palp |
0.72 |
0.26 |
0.34 |
- |
0.39 |
| I |
1.51 |
0.76 |
1.36 |
1.54 |
0.91 |
| II |
1.42 |
0.74 |
1.14 |
1.08 |
0.89 |
| III |
1.31 |
0.75 |
0.99 |
1.29 |
0.77 |
| IV |
2.02 |
0.79 |
1.82 |
2.28 |
1.12 |
Description
Colour:
Prosoma yellowish brown, sometimes with greyish striae, thoracic part paler; chelicerae dark orange brown. Legs yellowish brown. Abdomen in males darkgreyto black with anteromedian pale stripe and some subterminal, pale grey chevrons, venter pale to dark grey, in females dorsally pale grey with dark grey pattern.
Measurements
(males: n=6; females: n= 8): Male: Total length 3.6-4.6; prosoma 1.81-2.24 long, 1.21- 1.56 wide. Female: Total length 4.8-6.8; prosoma 1.99-2.26 long, 1.18-1.54 wide. Leg measurements as in
Table 3
, leg spination as in
Table 4
.
Male palp
(
Figs. 6-8
):Tibiawith small, curved dorsal and larger blunt retrolateral apophyses, the former with a tooth at its base, intermediate apophysis reduced to a short crest.Tegular process strongly protruding, nearly rectangular. Tegular apophysis elongated, terminally hooked and embolus short and bent.
Epigyne and vulva
(
Figs. 9-10
): With reversed trapezoid plate. Spermathecae closely set, separated by less than V a their diameter, basal part covered by epigynal plate.
Figures
6-‘
10::
Amaurobius lesbius
sp
.nov.
6. Male palp, lateral view; 7. Idem, ventral view; 8. Palpal tibia, dorsal view; 9. Epigyne, ventral view; 10.Vulva, ventral view.C = conductor;
DTA
= dorsal tibial apophysis; E = embolus; ITA = intermediate tibial apophysis; MR = median plate; RTA= retrolateral tibial apophysis; ST = spermatheca;
TA
= tegular apophysis;
TP
= tegular process.
Table4
:Amaurobiuslesbius sp.nov.Jeg spination (holotype).
|
Fe
|
Pt |
Ti |
Mt |
Ta |
| I |
Pi |
- |
3pi 2rl 3pv 3rv |
2pl 2rl 3pv 3rv pdrd* |
- |
| II |
Pi |
- |
3pi 2rl 3pv 3rv |
3pl 2rl pv 2rv pdrd* |
- |
| III |
(pd rd) |
- |
3pl 3pv rv rl |
2pl pv 3rv pd rd* |
- |
|
IV
|
rd |
- |
pv 3rv rl |
rl pv 3rv pd pv* |
- |
Further material examined
Agiasos
:
Agiasos S.
(
N 39°05’53”
E 26°21’57”
),
550 m
,
5 males
, pitfalls in
Castanea
forest,
X.2007
-
IV.2008
(
CJVK
); -
Mandamados
: road
Klio-Sykaminia
(
N 39°22’33”
E 26°10’59”
),
350 m
, stones in small
Pinus
forest,
1 subadult
male
1 female
,
6.X.2007
,
6 females
,
27.III.2008
(
CHDK
,
CJVK
,
CRB
)
.
Ecology:
All specimens were captured in
Castanea
,
Pinus
and
Quereus
forests. Males were only collected in winter, females in winter and spring.
Distribution
: At the moment, the species is only known from Lesbos, but as
Amaurobius
species generally have large distribution areas, it may occur on other East Aegean Islands as well.