Junnanotrechus microps Uéno & Yin, 1993

Belousov, Igor A. & Kabak, Ilya I., 2014, A taxonomic review of the genus Junnanotrechus Uéno & Yin, 1993 (Coleoptera: Carabidae: Trechinae), with description of six new species, Zootaxa 3811 (4), pp. 401-437 : 406-410

Junnanotrechus microps Uéno & Yin, 1993

( Figs. 7 , 9 )

Junnanotrechus microps Uéno & Yin, 1993: 358 , Figs. 1–3 (type locality: “Mt. Zhonghe Feng, 2,620 m in altitude, of the Diancang Shan Mountains, in Dali Shi of Yunnan, Southwest China ”).

Material examined: 5(1)♂, 4♀, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, 4 km W Dali old town, 2900–3000 m, 25°41.4' N / 100°06.7' E, E slope (edge of road, S slope with Salix, bamboo, knot grass, leaf litter, sifted), 22.06.2005, (D.W. Wrase) [15]( ZISP, CDW, CBK) { Fig. 35 : 6}; 2♀, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, 4 km W Dali old town, creek valley above cabble car, 2900–3000 m, 25°41.4' N / 100°06.7' E, E slope (devastated/old pine forest), 31.08.2003, (Schülke) [20]( CDW, CBK) { Fig. 35 : 6}; 1(1)♂, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, 3 km W Dali old town, creek valley and pine forest at "Cloud Road", right upper chair lift station, 2650–2750 m, 25°41.1' N / 100°06.8' E, (pine needles, dry moss in ditches), 30.08.2003, (M. Schülke) [19A]( CBK) { Fig. 35 : 7}; 1♀, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, 3 km W Dali old town, creek valley and pine forest at "Cloud Road", right upper chair lift station, 2650–2750 m, 25° 41.1 N / 100°06.8' E, (litter, pine needles, dry and wet moss), 29.08.2003, (Schülke) [19]( CDW) { Fig. 35 : 7}; 1(1)♂, 1♀, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, 5 km SSW Dali old town, creek valley above cabble car, 2800 m, 25°38.7' N / 100°08.3' E (shrubs, bamboo, moss, old flood debris), 26.08.2003, (Wrase) [15]( CDW) { Fig. 35 : 9}; 2♂, 1♀, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, 5 km SSW Dali old town, creek valley above cabble car, 2800 m, 25°38.7' N / 100°08.3' E (shrubs, bamboo, moss, old flood debris), 26.08.2003, (Schülke) [15]( CDW, CBK) { Fig. 35 : 9}; 4(2)♂, 1♀, “ CHINA (Yunnan), Cang Shan Mts., Dali env., E slope of Zhonghe Shan Mt., 2650 m, 25°41.2' N / 100°07.9' E (mixed forest with Pinus and Rhododendron , detritus and leaves sifted, in more humid depressions), 13.VI.2007, (J. Růžička leg.) [ CH 23]”( CDW, CBK) { Fig. 35 : 8}.

1(?) ♀, China (Yunnan), Dali Bai Aut. Pref., Zhemo Shan, 7 km SW Xiaguan, 2870–2970 m, 25°32–33' N / 100°10–11' E, (scrubs with bamboo, oaks, Rhododendr., litter sifted), 18.09.2009, (M. Schülke) [60]( CDW) { Fig. 27 :?“}. This female specimen is temporarily placed to J. microps . Examination of the male genitalia is necessary to clarify the true taxonomic position of this population.

Description. Medium-sized species with relatively narrow and convex body ( Fig. 7 ). For all morphometric characters of this and other species see Table 1 . Legs and antennae rather thick and average in length. Color of upper-side dark amber brownish, legs and antennae paler, uniformly amber reddish.

Indices Range (average), number ......continued on the next page

Indices Range (average), number

microps baehri wrasei triporus schuelkei koroleviellus oblongus elegantulus Head a little above average in size, oblong. Eyes small (but a little above average for genus), weakly to moderately convex. Tempora long, evenly and strongly convex, covered with sparse and long hairs, uppermost seta located markedly outside level of supraorbital pores. Supraorbital carina evenly developed, without distinct dilation above eye, at most, weakly depressed just near anterior edge of eye (not protruding beyond contour of eye). Width of head across eyes approximately the same as across tempora. Frontal furrows regular, deep and continuous, arcuate, only slightly impressed in posterior parts; parietal impression rather weak. Supraorbital pores well-defined, anterior one moderately, posterior one slightly foveolate, located on imaginary lines clearly convergent posteriad. Inner clypeal seta rather short. Labrum weakly concave. Mandibles large and slender, gradually and weakly curved, tooth on the right one with long base, tridentate, median denticle weaker than others, strongly spaced from distal one; premolar clearly defined. Labial tooth relatively long, with blunt or truncate apex, its ventral surface clearly longitudinally grooved. 6 submental setae. Palpi long and slender. Antennae long and stout.

Pronotum elongate moderately transverse, strongly convex; its sides very broadly rounded anteriorly, nearly straight or barely emarginate before hind angles, often slightly sinuate or angularly curved near anterior lateral seta. Hind angles small, obtusangular, rounded apically, markedly shifted anteriad. Basal margin slightly lobed: rectilinear or slightly convex medially, deeply incised and clearly oblique laterally. Anterior margin clearly salient, anterior angles rounded off. Lateral gutter rather narrow; evenly narrowed anteriad, strongly narrowed behind anterior lateral seta though weakly dilated just near hind angles. Lateral border continuous and evenly developed. Prebasal transverse impression very close and parallel to basal margin of pronotum, deeply engraved especially so opposing to very steep posterior slope of pronotal disk, consisting of 5 equidistant impressions including median one and basal foveae. Basal surface smooth; basal foveae small and shallow. Apical transverse impression normally simple, usually rather sharply engraved; occasionally either double or shallowing medially or even split into several fragments. Apical surface of pronotum more or less longitudinally rugulose. Discal foveae small but distinct. Median line average, not reaching anterior margin of pronotum, becoming deeper near prebasal transverse impression and shallow at base of pronotum.

Elytra oblong, relatively broad, with maximum width before mid-length, strongly convex. Humeri marked though rounded; both elytra conjointly rounded; preapical sinuation shallow. Lateral gutter very narrow, especially so in front of humeral group of umbilicate series although visible from above. Discal striae shallow, often completely effaced: at most, fragments of striae 1–2 distinguishable. Apical reccurrent striole long and wellimpressed, straight or, at most, slightly arcuate; only anteriorly curved medially and interrupted a bit posteriad of umbilicate pore 7. Parascutellar pore and tubercle well-developed; parascutellar striole as a short triangular impression, carinate interiorly. Apart from preapical pore, three discal setigerous pores on each elytron of which two anterior pores located on site of stria 3, posterior one – on site of stria 4, all being markedly shifted anteriad. Preapical pore in usual position, located approximately at level of anterior termination of apical reccurrent striole or slightly before it. Apical triangle strongly elongate, its inner side nearly subparallel to suture; outer summit of triangle (exterior pore) located only barely outward of inner side, either in middle between preapical and anguloapical pores or closer to former. Umbilicate series well-aggregated in oblong direction: divided into three usual groups but its pores located at different distance from lateral margin: pore 1 slightly, pores 3 and 4 stronger and pore 5 markedly shifted medially onto disk of elytra compared with umbilicate pore 6. Umbilicate pores 1–4 equidistant, pores 5 and 6 most approached and pores 7 and 8 most spaced.

Microsculpture completely obliterate on head, well traceable and consisting of transverse meshes on pronotum, indistinct on elytra. Surface of both pronotum and elytra iridescent. Dorsal surface completely glabrous, only a few very short hairs distinguishable on lateral margins of pronotum just before hind angles. All dorsum finely micropunctured. Ventrites irregularly microsculptured, a little more strongly near anterior margin.

Only one paramedian setae on each side of ventrite. Ventrites 2 and 3 fused (medially without distinct suture between them but with a transverse impression).

Front tibiae straight and excessively thick, strongly grooved externally, their anterior surface nearly glabrous, only with vestigial hairs in apical quarter. Male protarsi with two basal segments strongly dilated and each provided with massive inner tooth, even segment 1 clearly wider than long; adhesive appendages elongate.

Aedeagus ( Fig. 9 ) rather large, strongly curved, its basal part proportionally large, apex distinctly curved upward. In dorsal view, median lobe weakly curved, with small apical portion clearly attenuating. Sagittal aileron barely distinguishable; basal orifice not emarginate. Endophallus armature with a large, heavily sclerotized scaly patch located in median part of aedeagus tube before its mid-length near left wall. Distal parts of endophallus armature consisting of two oblique scaly bands. Parameres strongly but obtusangularly curved before their midlength, with very thin and narrow, parallel-sided distal portions, each bearing normally 4 very short apical setae and deprived of distinct ventral apophyses; left paramere much longer.

Notes. J. microps Uéno & Yin is the type species of the genus. It shows more affinities with two northern neighboring species of the genus: J. baehri Deuve and J. wrasei sp. n. Their differences are described below.

Sexual dimorphism. The sexual dimorphism in the morphometric characters is as indicated for the genus.

Variation. The specimens of 22.06.2005 differ in having more elongate body shape, more distinct temporal pubescence, and basal part of aedeagus weakly shorter. Occasionally one more setigerous pore is present, located in stria 4, outside of anterior discal pore on one elytron.

Distribution. Rather widespread in the southern part of the Diancang Shan Mt. R., W–SSW of the Dali Town, N Yunnan ( Fig. 35 , white square).

The only known female specimen from Zhemo Shan likely belongs to this species, though a male specimen is needed to prove it.

Bionomics. The species was collected in the forest litter (labelled as follows: “shrubs, bamboo, moss, old flood debris, creek valley and pine forest, pine needles, dry moss in ditches, litter, pine needles, dry and wet moss”) at elevations of 2620–3000 m a.s.l.

Figures

FIGURE 9. Male genitalia of Junnanotrechus microps Uéno & Yin: a—lateral view, b—dorsal view, c—parameres, d—genital segment.

FIGURE 35. Distribution of Junnanotrechus species.

FIGURES 7 – 8. Junnanotrechus spp, habitus: 7 — Junnanotrechus microps Uéno & Yin, male; 8 — Junnanotrechus schuelkei sp. n., holotype female.

FIGURES 1 – 6. Junnanotrechus elegantulus sp. n., paratype: 1 — mandibles: a—left, b—right; 2 — mentum, submentum, ligula and labial palpomeres; 3 — maxilla; 4 — labial palpus; 5 — elytra: a—left elytron, b—right elytron; 6 — male protarsus.

FIGURES 27 – 28. Junnanotrechus oblongus sp. n., habitus: 27 — male paratype; 28 — female paratype.

Tables

TABLE 1. Morphometric data of Junnanotrechus species. Character abbeviation as indicated in Material and Methods.

	microps	baehri	wrasei	triporus	schuelkei koroleviellus	oblongus	elegantulus
Length, mm	3.24–3.76 (3.49), 22	3.24–3.80 (3.53), 12	3.33–3.72 (3.57), 10	2.68–3.18 (2.91), 6	3.38, 1 3.00–3.46 (3.15), 18	3.57–4.16 (3.87), 29	3.11–3.64 (3.36), 20
PW/HW	1.18–1.32 (1.24), 22	1.21–1.33 (1.26), 12	1.24–1.32 (1.28), 10	1.18–1.26 (1.22), 6	1.23, 1 1.28–1.34 (1.30), 18	1.17–1.29 (1.24), 29	1.03–1.14 (1.10), 20
TL/YL	1.16–1.54 (1.37), 22	1.21–1.45 (1.32), 12	1.33–1.50 (1.41), 10	1.31–1.65 (1.44), 6	1.67, 1 1.54–2.08 (1.72), 18	0.95–1.31 (1.13), 29	1.43–2.43 (1.83), 20
L3/YL	1.17–1.50 (1.35), 21	0.20–1.53 (1.38), 12	1.34–1.50 (1.43), 10	1.02–1.25 (1.14), 6	1.60, 1 1.31–1.72 (1.52), 18	1.09–1.27 (1.19), 29	1.14–1.74 (1.45), 20
EL/AL	0.97–1.07 (1.01), 20	0.90–1.06 (0.97), 12	0.87–1.04 (0.94), 10	0.99–1.09 (1.03), 6	0.93, 1 0.95–1.08 (1.00), 18	0.96–1.11 (1.03), 29	0.85–0.95 (0.90), 20
AL/EL	0.94–1.03 (0.99), 20	0.95–1.11 (1.04), 12	0.96–1.14 (1.07), 10	0.92–1.01 (0.97), 6	1.07 0.93–1.05 (1.00), 18,	0.90–1.04 (0.97), 29	1.05–1.18 (1.11), 20
L3/L2	1.00–1.25 (1.15), 21	1.11–1.30 (1.21), 12	1.12–1.29 (1.20), 10	1.05–1.25 (1.15), 6	1.20, 1 0.93–1.07 (1.01), 18	1.00–1.21 (1.09), 29	1.07–1.23 (1.15), 20
L3/W3	1.50–2.00 (1.72), 21	1.67–2.09 (1.86), 12	1.72–2.14 (1.94), 10	1.45–1.70 (1.63), 6	1.98, 1 1.56–1.92 (1.74), 18	1.71–1.98 (1.84), 29	1.87–2.40 (2.12), 20
PW/PL	1.05–1.12 (1.08), 22	1.04–1.12 (1.08), 12	1.11–1.21 (1.15), 10	1.07–1.11 (1.09), 6	1.04, 1 1.10–1.22 (1.15), 18	1.06–1.18 (1.12), 29	0.98–1.09 (1.02), 20
PW/PB	1.42–1.57 (1.50), 22	1.38–1.52 (1.46), 12	1.41–1.53 (1.47), 10	1.35–1.41 (1.38), 6	1.59, 1 1.40–1.59 (1.52), 18	1.40–1.50 (1.46), 29	1.42–1.58 (1.50), 20
PA/PB	0.99–1.22 (1.10), 22	0.98–1.12 (1.05), 12	1.03–1.17 (1.09), 10	0.92–1.03 (0.97), 6	1.10, 1 1.03–1.16 (1.09), 18	1.00–1.15 (1.07), 29	1.07–1.26 (1.17), 20