Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Guangxi, South China
Author
Liu, Sheng-Nan
Author
Tang, Liang
text
Zootaxa
2017
4268
2
238
254
journal article
33042
10.11646/zootaxa.4268.2.4
d4cb7abf-edbd-4fd6-a205-04fd50a801d7
1175-5326
580207
75749A7A-2658-485E-A285-CD175A787C71
Stenus jinxiuensis
Liu and Tang
,
new species
(
Figs 9, 10
,
49–53
)
Type
material.
CHINA
:
Guangxi
:
Holotype
:
♂
,
Jinxiu County
, alt.
1200–1400m
.
27.VII.2011
,
PENG
Zhong
leg. (
SHNU
).
Description.
Brachypterous; body dark brown except head blackish, each elytron with a large elongate yellow spot near lateral margin, which is about 2/3 as long as and 1/2 as broad as the respective elytron. Antennae, maxillary palpi and legs yellowish except antennal club infuscate. Labrum reddish brown.
BL:
3.3 mm
, FL:
1.6 mm
.
HW:
0.71 mm
, PL:
0.51 mm
, PW:
0.50 mm
, EL:
0.54 mm
, EW:
0.59 mm
, SL:
0.44 mm
.
Head 1.20 times as wide as elytra; interocular area with two deep longitudinal
furrows, median portion convex, slightly extending beyond the level of inner eye margins, with a broad impunctate line along midline; punctures round, mostly well defined, slightly larger and sparser in median portion than near inner margins of eyes, diameter of large punctures about as wide as apical cross section of antennal segment II; interstices smooth, narrower than half to entire diameter of punctures except those along the midline of the convex median portion, which may be twice as wide as diameter of punctures. Paraglossae oval.
Pronotum 1.02 times as long as wide; disk relatively even, without distinct median longitudinal furrow; punctures round and more or less confluent, larger in size than those of head; interstices smooth, much narrower than half the diameter of punctures except for those at the actual middle of the pronotum, which could be slightly larger.
Elytra 0.92 times as long as wide, disk relatively uneven, each with distinct humeral impression; punctures round and confluent, similar size of those on pronotum; interstices smooth, distinctly narrower than half the diameter of punctures.
FIGURES 9–10.
Dorsal habitus of
Stenus jinxiuensis
sp. n.
Scale bars: 1 mm.
Legs with tarsomeres IV strongly bilobed.
Abdomen cylindrical; paratergites very narrow and almost impunctate, present only in segment III, tergites and sternites totally fused in segments IV–VI, posterior margin of tergite VII with indistinct palisade fringe; punctures round, gradually becoming smaller and sparser posteriad; interstices smooth, varying from narrower to much wider than diameter of punctures.
Male. Sternite VIII (
Fig. 49
) with shallow emargination at middle of posterior margin; sternite IX (
Fig. 51
) with long and straight apicolateral projections, posterior margin serrate; tergite X (
Fig. 50
) with posterior margin convex. Aedeagus (
Fig. 52
) with apical sclerotized area subtriangular and roundly projected at apex; expulsion clasps large; parameres distinctly longer than median lobe, each with 9 setae on apico-internal margins.
Female. Unknown.
Distribution.
China
(
Guangxi
).
Remarks.
The new species can be distinguished from other species by the combination of the following characters: body size smaller, the convex median portion of head with a broad impunctate midline throughout, each elytra with spot and different sexual characters.
Etymology.
The specific name is derived from the
type
locality of this species.