On Venezuelan pholcid spiders (Araneae, Pholcidae)
Author
Huber, Bernhard A.
33607F65-19BF-4DC9-94FD-4BB88CED455F
0000-0002-7566-5424
Zoological Research Museum Alexander Koenig, Bonn, Germany.
b.huber@leibniz-zfmk.de
Author
Villarreal, Osvaldo
679C385E-B068-4351-9D2F-97753E534C26
0000-0001-5355-3723
Museo del Instituto de Zoología Agrícola, Universidad Central de Venezuela, Maracay, Venezuela. & Museu Nacional / UFRJ, Rio de Janeiro, Brazil.
osvaldovillarreal@gmail.com
text
European Journal of Taxonomy
2020
2020-10-01
718
1
317
journal article
10.5852/ejt.2020.718.1101
2118-9773
4069574
F9E9A91E-488C-4DB1-9361-E788E9AC5BC1
Chibchea tunebo
Huber, 2000
Figs 110–111
,
127
,
134–140
, 1035
Chibchea tunebo
Huber, 2000: 171
, figs 652–655 (♂).
Diagnosis
Distinguished from similar congeners (
C. merida
Huber, 2000
;
C. thunbergae
Huber
sp. nov.
;
C. danielae
Huber
sp. nov.
) by male chelicerae (
Huber 2000
: fig. 652; long hairs proximally, deep frontal invagination, short spine-like hairs distally) and by female internal genitalia (
Figs 127
,
137
; Y-shaped anterior receptacle).
Type
material
VENEZUELA
–
Táchira
•
♂
holotype
,
AMNH
,
Pregonero
,
“2nd forest road at Camp Siberia”
,
1280 m
a.s.l.
[approximately
7.893° N
,
71.719° W
],
10–13 Jul. 1989
(
S. & J. Peck
)
.
New record
VENEZUELA
–
Táchira
•
3 ♂♂
,
6 ♀♀
,
2 juvs
,
ZFMK
(Ar 21845), and
4 ♀♀
,
4 juvs
in pure ethanol,
ZFMK
(Ven20-120),
SE Pregonero
,
forest near La Trampa
(
7.9236° N
,
71.7152° W
),
1300 m
a.s.l.
,
10 Feb. 2020
(
B.A. Huber
,
O. Villarreal M.
,
Q. Arias C.
)
.
Assigned tentatively
VENEZUELA
–
Mérida
•
5 ♂♂
,
1 ♀
,
ZFMK
(Ar 21846), and
4 ♀♀
,
1 juv.
in pure ethanol,
ZFMK
(Ven20-135),
forest above Caño Azul
(
8.8543° N
,
71.3651° W
),
280 m
a.s.l.
,
13 Feb. 2020
(
B.A. Huber
,
O. Villarreal M.
,
Q. Arias C.
)
•
1 ♂
,
3 ♀♀
,
1 juv.
,
ZFMK
(Ar 21847), and
3 ♀♀
in pure ethanol,
ZFMK
(Ven20-109),
Las Piedras
, ‘site 2’ (
8.9002° N
,
70.6279° W
),
1700 m
a.s.l.
,
degraded forest
,
7 Feb. 2020
(
B.A. Huber
,
O. Villarreal M.
,
Q. Arias C.
)
.
Note
We were
not
able to exactly locate the
type
locality “2
nd
forest road at Camp Siberia”, but “Campamento Siberia” is at
3 km
from our new collecting site, suggesting that the new site is within a few km from the
type
locality.
Redescription of male
(amendments; see
Huber 2000
)
Measurements (male from near La Trampa): Total body length 2.4, carapace width 0.9. Distance PME– PME
80 µm
; diameter PME
90 µm
; distance PME–ALE
80 µm
; distance AME–AME
15 µm
; diameter
AME
20 µm
. Leg 1: 19.1 (4.4 +0.3+ 4.6+8.4+ 1.4), tibia 2: 3.0, tibia 3: 2.4, tibia 4: 3.2; tibia 1 L/d: 61. Pair of lateral distal patches of short modified hairs situated on low light brown humps. Retrolateral
trichobothrium on tibia 1 at 10%; prolateral trichobothrium absent on tibia 1. Tibia
1 in
three other newly collected males from near La Trampa: 4.2, 4.5, 4.7.
Males from Caño Azul are slightly smaller (tibia
1 in
five males: 3.6–4.2, mean 3.9) but appear otherwise indistinguishable from males from near La Trampa. They are assigned tentatively because of the accompanying females (see below).
The male from
Las Piedras
has considerably shorter legs (tibia 1: 3.2), and the spines on the chelicerae are
not
divided into two patches on each side; the palps appear identical to males from La Trampa.
Description of female
Female in general very similar to male (
Fig. 111
). Epigynum simple, weakly curved transversal plate, without posterior plate (
Fig. 134
). Internal genitalia (
Figs 127
,
137–138
) with pair of large oval pore plates, anterior transparent receptacle Y-shaped. Tibia
1 in
six females: 3.2–3.6 (mean 3.4).
Females from Caño Azul are slightly smaller (tibia
1 in
five females: 2.7–3.0, mean 2.9) and have a slightly longer but narrower epigynal plate (
Fig. 135
; length/width: 0.22/0.34, versus 0.20/
0.40 in
females from near La Trampa). They are therefore assigned tentatively. The internal genitalia appear largely identical (large oval pore plates; Y-shaped anterior receptacle).
Females from
Las Piedras
are slightly smaller (tibia
1 in
six females: 2.7–3.0, mean 2.8) and the posterior epigynal margin is protruding rather than indented (
Fig. 136
); the internal genitalia (
Figs 139–140
) differ slightly in the shape of the pore plates (narrowing laterally) and in the shape of the receptacle (widened posteriorly rather than Y-shaped). They are therefore assigned tentatively.
Figs 128–133.
Chibchea
Huber, 2000
; epigyna, ventral views and cleared female genitalia, ventral and dorsal views.
128–130
.
C. thunbergae
Huber
sp. nov.
; from Lara, between Coro and Barquisimeto (type locality; ZFMK Ar 21842).
131–133
.
C. danielae
Huber
sp. nov.
; from Mérida, above Mesa Bolívar (type locality; ZFMK Ar 21844).
Distribution
Known from three localities in the Venezuelan states
Táchira
and
Mérida
(Fig. 1035); however, specimens from
Mérida
are assigned tentatively.
Natural history
At all three new localities, the spiders were found in the leaf litter, in curved leaves that provided space for the small, weakly domed webs.