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 latibasale
sp. n.
(
Figs 38–44
,
Map 1
)
Type material
:
Holotype
: “
NEPAL
oc. Distr. Jumla, Gothichaur Khola, SE,
10.VI.1997
,
3400–3600 m
, Rhododend. Buschzone, leg.
A. Weigel
GSB /
Holotypus
Lathrobium latibasale
sp. n.
, det.
V
. Assing 2013” (
NME
)
.
Paratypes
: 2 , 3 : same data as holotype (
NME
, cAss)
.
Etymology
: The specific epithet is an adjective composed of the Latin adjectives latus (broad) and basalis (basal) and alludes to the broad base of the ventral process (ventral view), the character best distinguishing this species from the similar
L. fodens
.
Map 2:
Distributions of
Lathrobium
species
in Nepal:
L. flexaculeatum
(white square),
L. rectaculeatum
(black star),
L. curvaculeatum
(white star),
L. hebes
(black square),
L. imberbe
(black triangle),
L. plicatum
(black diamond),
L. calcaratum
(circles; white circles: new records; black circle: type locality),
L. fodens
(white triangles),
L. aculeatum
(white diamonds).
Description
: Body size sexually dimorphic: body length in
6.4–6.8 mm
, in
5.3–6.2 mm
; length of forebody in 2.8–3.0 mm, in
2.5–2.7 mm
. Habitus as in
Fig. 36
. External characters (
Figs 36–37
) as in
L. fodens
.
: protarsomeres I–IV moderately dilated; posterior margin of tergite VIII convex; sternite VII (
Fig. 38
) distinctly transverse, posterior margin with relatively shallow bisinuate median excision, margin of this excision with comb of approximately 30 long pectinate setae, anterior to this comb with cluster of numerous stout black setae (
Fig. 39
); sternite VIII (
Fig. 40
) weakly transverse and with shallow impression in posteromedian portion, middle of this impression and anterior portion of sternite without pubescence, remainder of sternite with sparse pubescence, posterior excision of almost semi-circular shape; aedeagus (
Figs 41–42
) approximately
1.25 mm
long, symmetric; ventral process with broad base (ventral view) and apically shaped like a long straight sting; dorsal plate broad and short, in lateral view curved; internal sac without sclerotized structures.
: protarsomeres I–IV moderately dilated, slightly less so than in male; posterior margin of tergite VIII weakly convex; sternite VIII (
Fig. 43
) approximately 1.1 times as long as broad, sparsely pubescent, and with strongly convex posterior margin; tergite IX (
Fig. 44
) undivided in the middle and with moderately long, apically acute postero-lateral processes; tergite X (
Fig. 44
) flat, of oval shape, and indistinctly longer than antero-median portion of tergite IX.
Comparative notes
: As can be inferred from the highly similar external and sexual characters,
L. latibasale
is the adelphotaxon of
L. fodens
of the
L. pectinatum
group, which too is distributed in Jumla District. The new species is reliably distinguished from
L. fodens
only by the morphology of the aedeagus (base of ventral process broader in ventral view).
Distribution and natural history
: The
type
locality is situated in Jumla District,
Karnali Province
, West
Nepal
(
Map 1
). The specimens were collected in the rhododendron shrub zone at an altitude of
3400–3600 m
.