On Venezuelan pholcid spiders (Araneae, Pholcidae)
Author
Huber, Bernhard A.
33607F65-19BF-4DC9-94FD-4BB88CED455F
Zoological Research Museum Alexander Koenig, Bonn, Germany.
b.huber@leibniz-zfmk.de
Author
Villarreal, Osvaldo
679C385E-B068-4351-9D2F-97753E534C26
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
4069574
F9E9A91E-488C-4DB1-9361-E788E9AC5BC1
Pisaboa
Huber, 2000
Notes
The South American genus
Pisaboa
previously included four species, three of them in
Peru
and
Bolivia
(including the
type
species
P. silvae
Huber, 2000
), one in
Venezuela
. The Venezuelan species
P. laldea
Huber, 2000
appeared isolated
not
only geographically but also morphologically in having a modified male sternum.
Pisaboa marcuzzii
(
Caporiacco, 1955
)
comb. nov.
and the three newly described Venezuelan species below support the assignment of
P. laldea
to
Pisaboa
: for example,
P. marcuzzii
comb. nov.
is almost indistinguishable from
P. silvae
in its male palp morphology, and it shares the modified male sternum with
P. laldea
;
P. fombonai
Huber
sp. nov.
and
P. lionzae
Huber
sp. nov.
share the articulated male cheliceral apophyses with
P. silvae
and the modified male sternum with
P. laldea
. Our preliminary molecular data (J.J. Astrin, B.A. Huber, unpubl. data) also support the close relationship between
P. silvae
,
P. marcuzzii
comb. nov.
and
P. retracta
Huber
sp. nov.
Collecting in
Colombia
will most likely show that the geographic gap is artificial.
One of the characters that were originally thought to be diagnostic (
Huber 2000
) is
not
shared by
P. marcuzzii
comb. nov.
and
P. retracta
Huber
sp. nov.
: articulated male cheliceral apophyses. All other diagnostic characters in
Huber (2000)
are shared by all known species: female internal genitalia with arched pore plates and membranous putative receptacle; long and slender procursus; male palpal femur with finger-shaped ventral apophysis.
Nothing has previously been known about the biology of species of
Pisaboa
. Data from recent expeditions document considerable microhabitat diversity. Two of the new species below were collected from leaf litter, the other three species in retreats among vegetation
0.5–2 m
above the ground (see details below). At Tabatinga (
Brazil
), we collected
P. silvae
from the extremely spiny stems of Tucumá trees (
Astrocaryum vulgare
), with the spiders and their small webs well protected at the bases of the long spines (B.A. Huber & L.S. Carvalho, unpubl. data).