Two new species of the genus Loxopamea Hreblay & Plante 1995 (Lepidoptera: Noctuidae) from China
Author
Gyulai, Peter
Author
Saldaitis, Aidas
text
Zootaxa
2015
4032
3
345
350
journal article
10.11646/zootaxa.4032.3.12
004a66db-570b-4edf-a6b7-00d1cd0f27ce
1175-5326
234153
0B2FFD29-A738-4603-915A-2DADA89BCCA4
Loxopamea jakobi
sp. n.
(
Figs 3, 4
,
8, 9
,
14, 15
)
Type
material.
Holotype
: female (
Figs 3
,
14
)
China
, W. Sichuan, road Yaan/Kangding, Erlang Shan Mt., H-
2161 m
,
N29°87’
340”,
E102°30’
970”,
20.VIII.2014
, Floriani & Saldaitis leg., slide No PGY4094f (coll. PGM, later to be deposited in the
HNHM
).
Paratypes
:
12 males
,
10 females
(
Figs 4
,
8, 9
,
15
), with the same data as the
holotype
; slide Nos PGY
4040 m
, PGY
4086 m
, PGY
4090 m
, PGY4043f (colls AFM, ASV & PGM).
Diagnosis and description.
Wingspan
29–32 mm
, length of forewing
14–16 mm
. The adults of the
L. jakobi
sp. n.
are easily separable from the closely related Taiwanese
Loxopamea rufus
(
Chang, 1991
)
(
Figs 5, 6
) by their generally darker brown forewings with more extensive dark brown suffusion particularly in the middle and marginal fields, the regularly more white suffused reniform stigma and the somewhat distinct wing pattern (more arcuated postmedial line and obscure orbicular and claviform spots). The hindwing colouration of the two sister-species is practically the same, but the ground colour of the new species is slightly darker on both surfaces. The pubescence of the head and the thorax are darker deep chocolate-brown in
L. jakobi
without the rufous hue. The antemedial and postmedial crosslines are clearly visible, thin, defined by blackish and ochre-brown scales. The orbicular is a tiny circular spot, defined by black scales. The reniform stigma is variable brown and white, in certain specimens the white colouration enlarged in almost the whole stigma, but sometimes it is restricted to the outer edge of the stigma as a white semi annulus; however, the lower corner of the stigma is always defined by a rather sharp black dot. In the external features somewhat similar to
L. augustasi
(
Figs 1, 2
) (however in the genitalia armature very distinctive, since the two new species belong to different species groups), the pubescence of the head and the thorax and the basic colouration of the wings are darker brown in
L. jakobi
, whereas in
L. augustasi
the forewings are majorly ochre-brown, with variably strong rufous suffusion in the basal area, much stronger defined ante- and postmedial transversal lines and only a few white scales are in the filling of the reniform stigma. The known distribution of the two sister-species
L. rufus
and
L. jakobi
is completely allopatric since
L. rufus
occurs only in
Taiwan
, therefore the collecting locality also helps in the identification.
Male genitalia. The configuration of the male genitalia of
L. jakobi
(
Figs 8, 9
) are very similar to
L. rufus
(
Fig. 10
), with the following differences: the new species has falcifer, somewhat longer and thinner, distally more pointed digitus, that of its tip distally curves toward the ventral margin of valva, whereas in
L. rufus
it is almost straight, distally less tapered and its tip is projected toward the ventral edge of cucullus;
L. jakobi
has dorsally more ample, much longer vesica, smaller subterminal large diverticulum, with a shorter spine field in it.
Female genitalia. The female genitalia of
L. jakobi
(
Figs 14, 15
) is much more distinctive from that of the
L. rufus
(
Fig 16
), than the male genitalia. The most conspicuous differences are in the shape, length and sclerotization of ductus bursae and in the shape of appendix bursae and corpus bursae.
L. jakobi
can be easily distinguished by its longer, asymmetrically calycular, anteriorly much slimmer, longitudinally more ribbed-sclerotized ductus bursae; less prominent appendix bursae, curving distally towards the corpus bursae and by the shorter, globular corpus bursae.
Bionomy and distribution.
The new species is known from the Erlang Shan Mountains at the eastern edge of the Tibetan plateau in China's Sichuan province. Twenty three specimens were collected at late August at altitude ranging
2200 m
. All specimens were attracted by light and appear to have a very local distribution as
L. jakobi
was discovered in a single valley. The new species was collected in virgin mixed forest habitat dominated by various broad-leaved trees such as oaks (
Quercus dentata
,
Q. glauca
), poplars (
Populus cathayana
,
P. simonii
), elm (
Ulmus parvifolia
), rhododendrons (
Rhododendron brachycarpum
,
R. dauricum
), and bamboos (
Phyllostachys
ssp.,
Borinda
ssp.,
Fargesia
spp.).
Etymology
. The new species is named after Jakob Seibald (Vienna,
Austria
).