New species and records of Lathrobium from the Palaearctic region, primarily from Nepal (Coleoptera: Staphylinidae: Paederinae)
Author
Assing, Volker
text
Beiträge Zur Entomologie = Contributions to Entomology
2014
2014-07-31
64
1
1
28
https://www.contributions-to-entomology.org/article/view/1848
journal article
10.21248/contrib.entomol.64.1.1-28
0005-805X
4753531
Lathrobium hebes
sp. n.
(
Figs 106–114
,
Map 2
)
Type material
:
Holotype
[teneral]: “
NEPAL
SW
Dhaulagiri
, E Jaljala
3000 m
, 24.IX.12 lg.
J. Schmidt
,
28°30'49"N
,
83°15'18"E
/
Holotypus
Lathrobium hebes
sp. n.
, det.
V
. Assing 2013” (
NME
).
Paratypes
: 1 : same data as holotype (
NME
); 1 : “
NEPAL
SW
Dhaulagiri
, E Jatiala[sic]
3000 m
,
28°30'49"N
,
83°15'18"E
,
24.IX.2012
leg.
J. Schmidt
” (cAss)
.
Etymology
: The specific epithet (Latin, adjective: blunt) alludes to the apically blunt ventral process of the aedeagus.
Description
: Body length
4.8–5.5 mm
; length of forebody
2.4–2.8 mm
; male somewhat larger than females. Habitus as in
Fig. 106
. Coloration: forebody reddish; abdomen dark-brown to blackish-brown; legs and antennae reddish.
Head (
Fig. 107
) weakly oblong, 1.02–1.04 times as long as broad; punctation moderately dense and moderately coarse, sparser in median dorsal portion; interstices with distinct microreticulation. Eyes small, composed of approximately 10 ommatidia, approximately one-sixth as long as postocular region in dorsal view. Antenna
1.2–1.5 mm
long.
Pronotum (
Fig. 107
) approximately 1.25 times as long as broad and about as broad as head; punctation similar to that of head; midline broadly impunctate; interstices without microsculpture.
Elytra (
Fig. 107
) approximately 0.6 times as long as pronotum; punctation shallow; interstices without distinct microsculpture. Hind wings completely reduced. Protarsomeres I–IV with moderately pronounced sexual dimorphism; metatibia weakly compressed in apical twothirds in both sexes. Metafemora without distinct sexual dimorphism.
Abdomen slightly broader than elytra; punctation distinct and moderately dense; interstices with shallow microsculpture; posterior margin of tergite VII without palisade fringe; tergite VIII with convex posterior margin.
: protarsomeres I–IV strongly dilated; sternite VII (
Fig. 108
) distinctly transverse, in postero-median portion with transverse cluster of long and stout black setae, posterior margin with broad, bisinuate, and shallow posterior excision, margin of this excision with a comb of approximately 30 long palisade setae; sternite VIII (
Fig. 109
) 1.1 times as broad as long, in median portion extensively without pubescence, posterior excision moderately deep, moderately broad, and anteriorly rounded, lateral margins of this excision with a row of dense short setae; aedeagus (
Figs 110–111
)
0.9 mm
long and symmetric; ventral process basally broad and apically extending into a straight, spine-shaped, and apically truncate process in ventral view (
Fig. 112
); dorsal plate broad and very short; internal sac without appreciable structures.
: protarsomeres I–IV moderately dilated; sternite VIII (
Fig. 113
) 1.2 times as long as broad, posteriorly convexly produced; tergite IX (
Fig. 114
) with antero-median portion undivided in the middle and with short posterolateral processes; tergite X (
Fig. 114
) flattened and of oval shape, approximately 1.5 times as long as antero-median portion of tergite IX.
Comparative notes
: Among the species of the
L. pectinatum
group,
L. hebes
is characterized particularly by the
distinctive shape of the ventral process of the aedeagus and additionally by the shapes and chaetotaxy of the male sternites VII and VIII.
Distribution and natural history
: The type locality is situated in the southwestern
Dhaulagiri
range, Central
Nepal
(
Map 2
), at an altitude of
3000 m
. The
holotype
is distinctly teneral.