On the taxonomic validity of Indian ground spiders: IV. Genera Apodrassodes Vellard, 1924, Herpyllus Hentz, 1832 and Sergiolus Simon, 1892 (Araneae: Gnaphosidae)
Author
Sankaran, Pradeep M.
Author
Caleb, John T. D.
Author
Sebastian, Pothalil A.
text
Journal of Natural History
2021
2021-04-23
54
43 - 44
2839
2857
http://dx.doi.org/10.1080/00222933.2020.1871523
journal article
10.1080/00222933.2020.1871523
1464-5262
5405189
Hitobia singhi
(
Tikader & Gajbe, 1976
)
comb. nov.
(
Figure 8
)
Sergiolus singhi
Tikader & Gajbe, 1976: 189
, figs 10–13 (
♀
).
Tikader 1982: 445
, figs 338–342 (
♀
).
Gajbe 2007: 474
, figs 146–150 (
♀
).
Sergiolus singhii
Brignoli, 1983: 577
(lapsus).
Type material
Holotype
female from
INDIA
:
Karnataka
: Tumakuru (=Tumkur): Chiknayakanhalli Taluk: Bellara:
Forest Lodge Compound, N.P
. Singh leg.,
30 October 1975
, repository NZC-ZSI, Kolkata (no register number), examined.
Justification of the transfer
Detailed examination of the
type
of
S. singhi
revealed that it lacks diagnostic features of
Sergiolus
(see previous paragraph on
H. lamhetaghatensis
), but has all of the diagnostic features of
Hitobia
as in the case of previous species (compare
Figure 8
(b–d) with Kamura
Figure 8.
Hitobia singhi
comb. nov.
, female holotype of
Sergiolus singhi
(NZC-ZSI-5052/18). (a) habitus, dorsal view. (b) eyes, dorsal view. (c) epigyne, ventral view. (d) same, dorsal view. (e) label from type bottle. Scale bars a = 2 mm; b = 0.5 mm; c–d = 0.2 mm.
1992, figs 11, 16, 20, 25). Based on these observations, we propose to transfer
S. singhi
to
Hitobia
.
Diagnosis
Females of
H. singhi
comb. nov.
seem closely related to the females of
H. poonaensis
comb. nov.
in the shape of spermathecae, but can be distinguished from the latter by epigyne without anterior hood (which is present in
H. poonaensis
) and epigynal plate with V-shaped posterior margin (which is crescent-like in
H. poonaensis
) (compare
Figure 7
(d–e) with
Figure 8
(c–d)).
Supplementary description
Female (
holotype
,
Figure 8
(a–b)). Body length 9.44. Prosoma length 3.42, width 2.72. Opisthosoma length 6.02, width 3.72. Eye sizes and interdistances: ALE 0.13. AME 0.12. PLE 0.14. PME 0.11; AME–AME 0.12. AME–PME 0.20. PME–PLE 0.16. PME–PME 0.15. Length of chelicerae 1.05. Clypeus height at ALEs 0.12, at AMEs 0.15.
Epigyne
(
Figure 8
(c–d)): epigynal plate sclerotised, with V-shaped posterior epigynal margin (
Figure 8
(c)). Copulatory openings small, lying distantly from each other. Spermathecae large sac-like. (
Figure 8
(d)). Fertilisation ducts narrow, diverging.
Male
. Unknown.
Remarks
The ZSI collection has one glass bottle for this species labelled as ‘holotype’ (5052/18) containing a female specimen in poor condition. The same bottle has a small glass vial containing the dissected epigyne.
There
is a glass bottle in the ZSI collection containing a female specimen (4017/18) in poor condition collected from
Maharashtra
by
V
.D. Srivastava on
10 February 1970
. It is misidentified as
S. singhi
and is, in fact,
H. poonaensis
comb. nov.