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DEUVE ET AL.: CARABID BEETLE FAUNA OF THE GAOLIGONG MOUNTAINS 361<br />
eral lobes. Submentum with six setae subapically, gula broad. Genae with a single seta ventrally on<br />
each side. Antennae long and slender, extended to (in females) or slightly beyond (in males) the<br />
middle of the elytra, with five or six antennomeres beyond the pronotal base; antennonmeres 3 and<br />
4 virtually the same length and antennomere 2 slightly shorter.<br />
Pronotum. Relatively small, not or only slightly narrowed basally, only slightly transverse,<br />
ratio Pw/PL = 1.21, widest at anterior one-third; lateral margins rectilinear in basal half, not sinuate<br />
except for a very slight and short inflexion just anterior to the basal angle, which is subrectangular<br />
and sharp; pronotal disc smooth, glabrous, moderately convex; median longitudinal impression<br />
very fine; basal foveae deep, basal flattened area rather small, delimited laterally by short but<br />
deep and oblique furrows. Lateral explanation slender and moderately reflexed in anterior twothirds,<br />
then progressively broader in basal one-third without. Midlateral pair of setae inserted at<br />
anterior one-fifth and basolateral pair inserted at hind angles.<br />
Elytra. Convex, large and broad, especially in relation to pronotum, elytral silhouette ovoid,<br />
about equally narrowed apically and basally, humeri evident but rounded. All discal striae evident,<br />
regular, deeply impressed and punctate, however striae 1 to 4 effaced or nearly so near base, parascutellar<br />
striole rather long, recurrent stria continuous anteriorly with discal stria 5, intervals convex,<br />
only a single discal seta (anterior seta) present, inserted at basal one-eighth near stria 3. Parascutellar<br />
setiferous pore present at base at common origin of discal striae 1 and 2. Anterior discal<br />
seta present, inserted at basal one-eighth of elytra in stria 3, which is effaced anterior to that point.<br />
Middle discal seta absent. Preapical seta present on interval 3 near stria 2 opposite the anterior edge<br />
of the subapical sinuation. Umbilicate setal series with setae of humeral group equidistant for each<br />
other and those of median group both inserted posterior to middle of elytra.<br />
Legs. Slender but only moderately long. Protibiae furrowed. Male protarsi with tarsomeres 1<br />
and 2 dilated and apicomedially toothed.<br />
Male aedeagus. Median lobe (Fig. 9b) short, with apex bent ventrally and bluntly pointed,<br />
endophallus with a spoon-shaped sclerite.<br />
COMMENTS.— Members of this new species are morphologically similar to those of<br />
Agonotrechus birmanicus Bates (1892), described from Kachin State in Myanmar, and<br />
Agonotrechus tenuicollis Uéno (1986), described from eastern Nepal. However, they can be distinguished<br />
from members of both of these other species by the following features: pronotum with<br />
anterior margin straight, not concave, anterior angles only faintly projected and more broadly<br />
rounded, and lateral borders more slender anteriorly and at middle; and apex of the median lobe of<br />
the male aedeagus narrower and more curved.<br />
HABITAT DISTRIBUTION.— Members of this species have been found in and under rotting logs<br />
in dark, closed-canopy broadleaf evergreen forest (Fig. 44) at elevations ranging from 2020 to 2067<br />
m. Although members of no other Agonotrechus species have been found syntopic with those of A.<br />
xiaoheishan, specimens of Trechus indicus were collected in the same samples.<br />
GEOGRAPHICAL DISTRIBUTION WITHIN THE GAOLIGONG SHAN.— Fig. 9c. we examined a total<br />
of 14 specimens (4 males and 10 females), all from Xiaoheishan Forest Reserve in the southern<br />
part of the Gaoligong Shan (see Type material above for exact collection data).<br />
This species was recorded only from near the top of the western slope in the southern part of<br />
the study area (Core Area 6). Its known geographical range does not overlap with that of any other<br />
Agonotrechus species, although A.yunnanus has been recorded from the adjacent Core Area 7 on<br />
the eastern slope of the Gaoligong Shan, 13.3 km to the north.<br />
OVERALL GEOGRAPHICAL DISTRIBUTION.— This species currently is known only from the type<br />
area in the southern part of the Gaoligong Shan, in western Yunnan Province, China.