Taxonomic review of the Thysanoptyx Hampson generic complex (Lepidoptera: Erebidae: Arctiinae: Lithosiini). II. The genus Thysanoplisna Volynkin with descriptions of seven new species from Vietnam and mainland China
Author
Volynkin, Anton V.
text
Zootaxa
2024
2024-09-09
5506
3
428
450
http://dx.doi.org/10.11646/zootaxa.5506.3.7
journal article
10.11646/zootaxa.5506.3.7
1175-5326
13747211
F7F39F20-07D0-434B-9DB7-160C19D519E5
Thysanoplisna tenebrosa
sp. nov.
(
Figs 31, 32
,
51
,
66
)
Type material
.
Holotype
(
Figs 31
,
51
):
♂
, “
China
, Sichuan-prov. |
Kangding
|
30.VI.2009
” / “Museum Witt | München” / “Slide |
ZSM
Arct. | 2021-
448♂
|
A. Volynkin
” (MWM/
ZSM
).
Paratypes
.
CHINA
:
1 ♀
, same data as holotype, gen. prep.
No.
:
ZSM
Arct.
2021
-
448♀
(MWM/
ZSM
)
;
1 ♂
,
1 ♀
, [
Sichuan Prov.
] 25.31.
Mt. Omei
,
3000–4000 ft.
, 17.vii.[19]31,
G.M. Franck
[leg.] (
NHMUK
)
;
1 ♂
, [
Sichuan Prov.
, Kangding]
Chasseurs
indigénes de Tâ-tsien-lou,
Récolte
de 1910 /
Ex Oberthür Coll.
,
Brit. Mus.
1927–3. /
Brit. Mus.
1963-505, unique ID:
NHMUK010606151
(
NHMUK
)
.
Diagnosis
. The forewing length is
16.5–17.5 mm
in males and 18.0–19.0 mm in females.
Thysanoplisna tenebrosa
sp. nov.
is superficially similar to
Th. directa
but can be distinguished by its darker, brownish-grey forewing ground colour (it is ochreous brown in the congener), and the remarkably broader medial forewing spot in both sexes. The male genital capsule of the new species is very similar to
Th. directa
but has a narrower and somewhat more elongate distal section. The phalli of the two species are alike. Compared to
Th. directa
, the vesica of
Th. tenebrosa
sp. nov.
has a longer basal diverticulum, a narrower distal section with markedly thinner and slightly shorter cornuti, and an additional, short lateral diverticulum bearing a small spike-like cornutus. The female genitalia of
Th. tenebrosa
sp. nov.
differ from
Th. directa
in the posteriorly broader ductus bursae, the larger posterior gelatinous enlargement of the corpus bursae, and the longer and broader appendix bursae. Additionally, the signum bursae of the new species is smaller and nearly round whereas it is elliptical in the congener.
Distribution
. Southwestern
China
(
Sichuan Province
).
Etymology
. The Latin ‘tenebrosus’ means ‘dark, gloomy’ and refers to the dark forewing ground colour of the new species. The name is an adjective in apposition to the genus name.