Six new species and additional records of Lathrobium from the Palaearctic region
Author
Assing, V.
text
Linzer biologische Beiträge
2013
2013-07-31
45
1
247
266
journal article
55731
10.5281/zenodo.4507360
4eab4a56-748d-4606-b925-2c605cff7b94
0253-116X
4507360
Lathrobium makaluicum
nov.sp.
(
Figs 8-13
,
Map 2
)
Type material:
Holotype
♂
: "O
Nepal
1980,
W. Wittmer
/
Mumbug
O
Makalu
3500 m
9.6. / Holotypus ♂
Lathrobium makaluicum
sp. n.
, det.
V. Assing
2013" (
NHMB
).
Etymology: The name is an adjective derived from the name of the mountain range where the
type
locality is situated.
Description: Body length
7.2 mm
; length of forebody
3.1 mm
. Coloration: forebody dark-brown; abdomen blackish; legs and antennae pale-reddish.
Head (
Fig. 8
) 1.03 times as broad as long; punctation moderately coarse and rather sparse; interstices with distinct microreticulation. Eyes weakly projecting from lateral contours of head, approximately one third as long as postocular region in dorsal view and composed of approximately 30 ommatidia.
Pronotum (
Fig. 8
) 1.18 times as long as broad and 1.02 times as broad as head; punctation similar to that of head; impunctate midline rather broad; interstices with microsculpture.
Elytra (
Fig. 8
) short, 0.53 times as long as pronotum; humeral angles weakly marked; punctation shallow and rather sparse; interstices without distinct microsculpture. Hind wings completely reduced.
Abdomen 1.1 times as broad as elytra; punctation fine and moderately dense, somewhat sparser on tergites VII-VIII than on tergites III-VI; posterior margin of tergite VII without palisade fringe; posterior margin of tergite VIII weakly convex.
♂: protarsomeres I-IV strongly dilated; sternite VII (
Fig. 9
) distinctly transverse and with rather extensive postero-median impression, this impression with moderately modified stout black setae, posterior margin weakly concave; sternite VIII (
Fig. 10
) distinctly transverse, middle with distinct longitudinal impression, this impression narrowly without setae along the middle, on either side of middle with extensive oblong cluster of numerous moderately modified stout black setae, posterior margin indistinctly concave in the middle; aedeagus (
Figs 11-13
)
1.15 mm
long and symmetric; ventral process curved and apically very acute in lateral view, apex narrowly truncate in ventral view; dorsal plate with moderately long and lamellate apical portion, and with short, weakly sclerotized basal portion; internal sac with dark membranous structures.
♀
: unknown.
Comparative notes: Based on the external (habitus, coloration, presence of microsculpture on the pronotum) and the male sexual characters,
L. makaluicum
undoubtedly belongs to the
L. nepalense
group. In the key in
ASSING (2012b)
, it would key out at couplet 13, together with the externally similar
L. diremptum
and
L. bibarbatum
from Taplejung district in eastern
Nepal
. It is distinguished from these species by the different shape and chaetotaxy of the male sternite VIII and by the different morphology of the aedeagus (shape of ventral process and of dorsal plate; internal structures).
Distribution and natural history: Thetypelocality is situated to east of the Makalu range in eastern
Nepal
(
Map 2
). The
holotype
was collected at an altitude of
3500 m
.