The pholcid spiders of Sri Lanka (Araneae: Pholcidae)
Author
Huber, Bernhard A.
text
Zootaxa
2019
2019-01-23
4550
1
1
57
journal article
27502
10.11646/zootaxa.4550.1.1
291701d4-652e-440e-adab-f6b0201c0972
1175-5326
2625030
2F7D1EC4-D4ED-4FAE-B227-CF7B79EAE833
Wanniyala
Huber & Benjamin, 2005
Wanniyala
Huber & Benjamin, 2005
: 3311
.
Type
species:
W. agrabopath
Huber & Benjamin, 2005
(
Sri Lanka
).
Notes
.
Wanniyala
is currently considered a Sri Lankan endemic genus but its apparent absence in
India
and the Western Ghats in particular is difficult to interpret. With only eleven pholcid species (three of them introduced),
India
ranks among the most poorly studied countries in the world with respect to pholcid spiders.
Wanniyala
spiders are cryptic litter-dwellers and may have been overlooked by previous generalist collectors.
In
Sri Lanka
,
Wanniyala
has experienced a remarkable radiation, mainly in the southwestern wet climatic zone and the central highlands. All known species are similar to each other in their morphology (see below) and apparently also genetically (five species included in the analysis of
Eberle
et al.
2018
), suggesting a rather recent radiation. However, available data also suggest that the closest relatives of
Wanniyala
are African, Madagascan, and Mediterranean taxa (
Eberle
et al.
2018
;
Huber
et al.
2018
). Thus, for
Wanniyala
Sri Lanka
might be both a ‘museum’ and a ‘cradle’ (cf.
Chown & Gaston 2000
).
The procursus is highly complex and species-specific but always includes the same five distal structures that are hinged against a simple proximal part (labeled in
Figs 160–161
,
167–168
,
176–177
): a retrolateral sclerite; a ventral transparent process; two prolateral sclerites; and a prolateral transparent process that usually has a bifid tip.