A survey of Palaearctic Dictynidae (Araneae). 1. Taxonomic notes on Dictynomorpha Spassky, 1939, Brigittea Lehtinen, 1967 and Lathys Simon, 1884
Author
Marusik, Yuri M.
Author
Esyunin, Sergei L.
Author
Tuneva, Tatyana K.
text
Zootaxa
2015
3925
1
129
144
journal article
10.11646/zootaxa.3925.1.9
98786b6c-26a1-4204-9967-e2190ecce616
1175-5326
243577
52C2B852-7814-4313-B18A-717241C81E4F
“
Lathys
”
mussooriensis
Biswas & Roy, 2008
Lathys mussooriensis
Biswas & Roy 2008
: 44
, figs 1–3 (♀).
Comments
. This species was described from a
holotype
female and 2 immature females from Uttaranchal State (northern
India
). The description of the species, comments on the genus and its taxonomic placement is full of contradictions and confusions.
Biswas & Roy (2008)
report the distribution of the genus as New
England
,
Canada
and Asia, neglecting that the
type
species is from Europe. In the description of the species, the authors mentioned that
L. mussooriensis
is similar to
Theridiidae
and allied to
Lycosidae
: “These spiders are peculiar in their body shapes look like as Theridiid, having the elongated abdomen. Detailed study of different morphological features, clearly shows that they are allied to
Lycosidae
” (
Biswas & Roy 2008: p. 44
). The distribution of the species is given as “
India
: Mussoorri, Uttaranchal (New record). Elsewhere: North
America
,
Canada
)” (
Biswas & Roy 2008: p. 46
). A few lines below the authors state in their comments: “
Lathys
is one of the important genus under the family
Dictynidae
which was only found in
America
and Europe”. In the diagnosis,
Biswas & Roy (2008)
compare their new species with the Nearctic
L
.
foxii
(Marx, 1891)
. The authors mentioned that this is the first record of
Lathys
on the Indian sub-continent, neglecting
Lathys balestrerii
Caporiacco, 1934
(considered a synonym of
L. stigmatisata
) described from
British India
(now
Pakistan
).
The description and figures provided for habitus and copulatory organs indicate that the species belongs not to the
Dictynidae
but to the
Amaurobiidae
. The body length of the Indian “
Lathys
” (
15 mm
) exceeds by 3–8 times size of other
Lathys
species and larger than any
Dictynidae
known. The epigyne and vulva of
“L.”
mussooriensis
is similar to epigynes of
Himalmartensus
Wang & Zhu, 2008
, a genus known to include three species from
Nepal
. The epigyne of
“L.”
mussooriensis
has long coiled insemination ducts forming a kind of column.
Himalmartensus
lacks a cribellum but has a colulus (
Wang & Zhu 2008
). Although it is unknown if
“L.”
mussooriensis
has a cribellum or not,
“L.”
mussooriensis
differs from members of
Himalmartensus
by the number of cheliceral teeth (
1 in
promargin and
2 in
retromargin [such state is unknown in any
Amaurobiidae
and
Lathys
, and authors very likely overlooked small teeth], and 6–7 promarginal and 5–8 retromarginal in
Himalmartensus
). Therefore, we transfer this species from
Dictynidae
to
Amaurobiidae
and suggest the new combination
Himalmartensus mussooriensis
(
Biswas & Roy, 2008
)
,
comb. n.
FIGURES 43–50.
Lathys truncata
(43 from Buryatia, 44 from Almaty Area),
L. spasskyi
(45–47 from Kyrgyzstan),
L. stigmatisata
(48–50 from Azerbaijan), copulatory organs. 43–46, 48 Epigyne, ventral. 47, 50 Male palp, retrolateral. 49 Epigyne, dorsal. Scales = 0.1 mm. Abbreviations: Es—septum; Fo—atrium; Pc—conical outgrowth of patella; Tc—tip of conductor.
FIGURES 51–55.
Lathys stigmatisata
(51–52 from Crimea),
L. spasskyi
(53–55 ♂ from Kyrgyzstan, ♀ from Akmola), copulatory organs. 51, 53 Bulbus, dorsal. 52, 54 Tip of conductor. 55 Epigyne, fronto-ventral. Abbreviations: Eb—base of embolus; Fo—atrium; Sl—seminal loop.
It is worth noting that
H
.
mussooriensis
is also similar to “
Titanoeca
”
palpator
Hu & Li, 1988, a cribellate species from Xizang (Tibet) which also is large, and has a similar epigyne. The species from Tibet appears also to be misplaced in
Titanoecidae
judging from the copulatory organs and large body length (up to
17.4 mm
).