Junnanotrechus baehri Deuve, 2011

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 : 411-422

Junnanotrechus baehri Deuve, 2011 .

( Figs. 13–16 )

Junnanotrechus baehri Deuve, 2011: 70 , fig. 7 (type locality: “ Chine, Yunnan, Jizu Shan, 2622 mètres, 25°59´17´´ N – 100°20´17´´ E ”).

Material: 5(4)♂, 1♀, China (Yunnan), Dali Bai Aut. Pref., Jeu Shan, summit plateau, 37 km NE Dali, 3150 m, 25°58´30´´ N / 100°21´36´´ E, (mixed forest, sifted from litter, moss, mushrooms), 5.09.2009, (M. Schülke) [28]( ZISP, CBK, CDW) { Fig. 35 : 3}; 1(1)♂, China (Yunnan), Dali Bai Aut. Pref., Jeu Shan, path to cable car, 37 km NE Dali, 2450 m, 25°58´N / 100°23´E, (mixed forest, litter, moss sifted), 5.09.2009, (D.W. Wrase) [29]( CDW) { Fig. 35 : 4}; 2(1)♂, 3♀, CHINA (Yunnan), Ji Zu Shan Mt., Shanzhi env., 2180–2580 m, along pass to summit 25°57.7–8´N / 100°22.1–23.6´E (dense mixed forest with dominant Pinus , Quercus and Rhododendron under stones), 22.–24.VI.2007, (J. Růžička) [ CH 45–47]( CBK, CDW) { Fig. 35 : 5}.

Description. Medium-sized species (body length slightly above average for genus) with very narrow and strongly convex body ( Figs. 13–14 ). Legs and antennae rather stout and average in length. Color of upper-side from amber-reddish to dark brownish, legs and antennae slightly paler, uniformly reddish-testaceous. Base, suture and margins of elytra, at most, vaguely tinged with reddish.

Head rather small, oblong and convex. Eyes small but above average in size, protrudent (head across eyes markedly wider than at level of temples. The latter long and strongly convex, covered with sparse and long hairs. Supraorbital carina extending onto upper edge of eye and slightly dilated there. Width of head across eyes only marginally wider than across tempora. Frontal furrows regular, deep and continuous, strongly approached and nearly parallel-sided in median part, only slightly deeper in posterior parts, occasionally, with shallow transverse wrinkles obliquely extending onto frons; parietal impression rather weak. Supraorbital pores well-defined, anterior one more deeply foveolate, located on imaginary lines clearly convergent posteriad. Inner clypeal seta rather short. Labrum concave. Mandibles relatively 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 moderately separated from the remainder of tooth. Labial tooth relatively long, grooved ventrally, blunt or truncate apically. Normally 6 submental setae, though median pair occasionally more or less reduced. Mental suture distinct. Palpi long and slender.

Pronotum weakly wider than long, strongly convex, slightly constricted toward base. Its sides weakly rounded for most length, nearly straight posteriorly, normally with slight sinuation at level of anterior lateral seta and, at most, barely sinuate before hind angles. Basal margin lobed: rectilinear or slightly convex medially, deeply incised, then convex to rectilinear laterally; seldom hind angles obtusangular, their posterior margins rectilinear as in J. microps . Anterior margin normally strongly salient, anterior angles rounded. Lateral gutter narrow, weakly dilated just near hind angles and anterior lateral seta. Lateral border continuous. Prebasal transverse impression deeply engraved, rather variable in structure, from relatively regular with a few wrinkles to consisting of 5 equidistant impressions. Basal surface mostly smooth, occasionally shallowly rugose; basal foveae small and shallow. Apical transverse impression shallow, pronotal surface in front of it normally with a row of punctures or irregular wrinkles, very seldom smooth. 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 rather narrow, regularly ovate, strongly convex, slightly flattened on disk, with maximum width near mid-length. Humeri rather oblique, rounded; both elytra conjointly rounded and usually blunt at apex, at most, forming only very small and weak re-entrant angle; preapical sinuation shallow. Lateral gutter very narrow, especially so in front of humeral group of umbilicate series, although visible from above. Discal striolation reduced; at most, striae 1–4 fragmentary traceable in basal half. The first stria rather well-developed on basal slope of elytra near parascutellar pore, becoming shallower posteriorly and gradually disappearing on disk of elytra. Apical striole long and well-engraved, straight, rather sharply interrupted anteriorly at level between of umbilicate pores 7 and 8, occasionally its anteriormost part slightly and briefly curved inward. Parascutellar pore and tubercle well-developed; parascutellar striole with small round puncture-like impression at level of parascutellar pore. 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, at level, on average, a bit behind umbilicate pore 5. Preapical pore near level of anterior termination of apical reccurrent striole. Apical triangle elongate, its inner side nearly subparallel to suture; exterior pore located markedly outward line connecting preapical and angulo-apical pores, approximately at middle between preapical and angulo-apical pores being closer to the latter or former depending on the specimen. Umbilicate series as in J. wrasei sp. n., the humeral group being especially close to elytral base and removed from median one.

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. All dorsum finely but distinctly micropunctured, occasionally with a few larger punctures located either along lateral depression of pronotum or frontal furrows. 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 thick, strongly grooved externally, their anterior surface nearly glabrous, without distinct hairs. 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. Tarsi of hind legs short.

Aedeagus ( Figs. 15 – 16 ) rather large, strongly curved just before its mid-length; its basal bulb very long, ventral margin of apical portion more or less clearly S-shaped, apex button-like, with only dorsal protruding. In dorsal view, median lobe nearly parallel-sided except for rather short apical portion which is sharply narrowed distally and truncate just at apex ( Fig. 16 b). Sagittal aileron indistinct; basal orifice not emarginate. Endophallus armature feebly sclerotized, consisting of a few long scaly plicae located in dorsal, median and ventral parts of median lobe while viewed laterally. Its shape varying significantly depending on the position of the endophallus (see Figs. 15 a and 16 a). Parameres strongly curved in median part, with very thin and parallel-sided distal portions, each bearing normally 4 apical setae of which dorsal and ventral ones tend to be shifted proximally and deprived of distinct ventral apophyses; left paramere longer.

Comparative notes. As far as the external characters concerned, J. baehri is very similar to J. microps differing from it by the pronotum weaker constricted toward base (see PW/PB ratio) and more convex elytra (see EL/BH ratio). However, the male genitalia are markedly different in the two species: the median lobe is more slender, more markedly and evenly curved, with clearly longer basal portion, the endophallus armature is very poorly sclerotized in J. baehri ( Figs. 15–16 vs. Fig. 9 ).

Sexual dimorphism. In contrast to other congeners, available male and female specimens of this species do not differ from each other in the elytral shape. Males have, on average, the antennae weakly longer and the pronotum between the anterior angles weakly wider.

Distribution. The species inhabits the Jizu (=Ji Zu or Jeu) Shan Mountain Range Yunnan, Dali Bai Autonomous Prefecture ( Fig. 35 , black rhomb). This species co-exits with J. exophtalmus , for the moment the only known case of the sympatry for the species of the genus.

Bionomics. The new species occurs in a wide belt of altitudes between 2180–3150 m a.s.l. inhabiting the thick litter of mixed forests. Specimens of the type series were obtained from sifting litter and moss as well as from under stones.

Junnanotrechus wrasei Belousov & Kabak , sp. n. ( Figs. 10–12 )

Type material: Holotype: CHINA: 1(1)♂, “ China (N Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, pass 43 km NW Dali, 3104 m, 25°59´33.5´´ N / 99°52´12.5´´ E, (pasture & shrubs, litter, moss and mushrooms sifted), 23.08.2009, (M. Schülke) [01]( ZISP) { Fig. 35 : 1}. Paratypes: CHINA: 3(1)♂, 4♀, collected with the holotype; 2(1)♂, “ China (Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, pass 43 km NW Dali, 3104 m, 25°59´33.5´´ N / 99°52´12.5´´ E, (oak shrubs, Rhod., bamboo, litter sifted), 23.08.2009, (D.W. Wrase) [01A]( CDW, CBK) { Fig. 35 : 1}; 1♀, China (Yunnan), Dali Bai Nat. Aut. Pref., Diancang Shan, pass, 43 km NW Dali, 2700 m, 25°59´50´´ N / 100°00´30´´ E, (secondary pine forest, litter, moss, mushrooms sifted), 23.08.2009, (M. Schülke) [02] ( CDW, CBK) { Fig. 35 : 2}.

Description. Medium-sized (slightly above average for genus) species with narrow and strongly convex body ( Figs. 10–11 ). Legs and antennae relatively long and thick. Color of upper-side in mature specimens from amberreddish to brownish, legs and antennae a bit paler, uniformly reddish-testaceous. Base, suture and margins of elytra vaguely tinged with reddish.

Head small, oblong and convex. Eyes small (though slightly bigger than in other congeners), but rather convex. Tempora long, evenly and strongly convex, covered with sparse and long hairs. Supraorbital carina extending onto upper edge of eye and slightly dilated there. Width of head across eyes only marginally wider than across tempora. Frontal furrows regular, deep and continuous, less arcuate in median part, only slightly deeper near shallow parietal impression. Supraorbital pores well-defined, anterior one distinctly, posterior one barely foveolate, located on imaginary lines clearly convergent posteriad. Inner clypeal seta rather short. Labrum weakly concave. Mandibles relatively 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 moderately separated from the remainder of tooth. Labial tooth relatively long, with blunt or truncate apex, its ventral surface clearly longitudinally grooved. 6 submental setae. Palpi long and slender.

Pronotum more transverse than in other species of genus, rather massive, strongly convex. Its sides very broadly rounded anteriorly (normally evenly convex or slightly salient at level of anterior lateral seta), nearly straight or faintly sinuate before hind angles. Basal margin lobed: rectilinear or slightly convex medially, deeply incised and either convex or rectilinear laterally; inner part of posterior margin of hind angle subperpendicular to oblong axis of body, outward becoming obliquely truncate; occasionally hind angles obtusangular, their posterior margins rectilinear, approximately as in J. microps . Anterior margin salient, anterior angles completely rounded. Lateral gutter rather evenly narrow, weakly dilated just near hind angles and at level of anterior lateral seta. Lateral border continuous. Prebasal transverse impression deeply engraved, consisting of 5 equidistant impressions including median one and basal foveae. Basal surface smooth or finely rugulose; basal foveae small and shallow. Apical transverse impression simple, usually finely outlined. Anterior surface smooth or more seldom shallowly rugose. 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 relatively narrow, regularly ovate, strongly convex, slightly flattened on disk, occasionally weakly impressed along suture, with maximum width near mid-length. 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 striolation reduced; at most, stria 1–4 fragmentary discernible in basal half as a row of isolated shallow very small foveae. The first stria rather well-developed on basal slope of elytra near parascutellar pore, becoming shallower posteriorly and being even less impressed on disk of elytra than striae 2 and 3. Apical striole long and well-engraved, straight, rather sharply interrupted anteriorly at level between of umbilicate pores 7 and 8, occasionally its anteriormost part slightly and briefly curved inward. 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 at level, on average, a bit before umbilicate pore 5. Preapical pore normally at or slightly behind level of anterior termination of apical reccurrent striole. Apical triangle elongate, its inner side nearly subparallel to suture; exterior pore located markedly outward line connecting preapical and angulo-apical pores, approximately at middle between preapical and angulo-apical pores. Umbilicate series well-aggregated in oblong direction and clearly divided into three usual groups (median group is especially well-separated) 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. Distance between pores within humeral group of umbilicate series gradually increasing towards pore 4, especially so in regard with distance between pores 3 and 4. Pores 5 and 6 most approached and distance between pores 7 and 8 approximately the same as between pores 3 and 4.

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 thick, strongly grooved externally, their anterior surface nearly glabrous, without distinct hairs. 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. 12 ) medium-sized, moderately curved, its basal part not very large, apex button-like, with only dorsal protruding. In dorsal view, median lobe nearly parallel-sided, with apex sharply truncate. Sagittal aileron small in lateral view but well-distinguished in dorsal view; basal orifice not emarginate. Endophallus armature consisting of moderately sclerotized and complicatedly folded scaly area. Parameres strongly curved in median part, with thin and narrow distal portions, each bearing 4, more seldom 5–6 apical setae and deprived of distinct ventral apophyses; left paramere clearly longer.

Sexual dimorphism. As indicated under the genus description.

Comparative notes. Externally, the species is very similar to J. microps Uéno & Yin, 1993 , except for more massive pronotum and more weakly flattened elytra. Additionally, the posterior margin of hind angle (in other words, lateral portions of the pronotal base) approximately perpendicular to oblong axis of body and often convex while obliquely truncate in J. microps . The new species can be readily distinguished from J. microps only based on the structure of the male genitalia: the median lobe smaller, less strongly curved, its apical part in dorsal view truncate, not triangular shaped as in J. microps . The endophallus armature is deprived of large and heavily sclerotized scaly patch near the left wall of the median lobe, with only small scaly patch in its distal part in ventrolateral position and rather narrow band in dorsal position.

Externally J. wrasei sp. n. is most similar to J. baehri . The differences between these two taxa are only marginal: first of all, J. wrasei sp. n. is distinct in having the wider pronotum, more markedly constricted toward base, with the lateral margins not sinuate near level of anterior lateral seta and without a row of punctures or shallow wrinkles anteriad of prebasal transverse impression. Additionally, J. wrasei sp. n. differs by the elytra less convex and slightly narrower and longer legs and antennae (for more detailed information with respect to the significance level of differences see Table 2 ). Despite the subtle external similarity, these two species differ readily from each other in the structure of the male genitalia: the aedeagus of J. wrasei sp. n. is smaller, less strongly curved in median part, the apical portion not narrowed, broadly truncate apically in dorsal view ( Fig. 16 b vs. Fig.

12). The endophallus armature is also different: with distinct scaly patches and deprived of fine longitudinal bands (plicae) of scales.

Distribution. The species inhabits the northern part of the Diancang Shan Mountain Range, N Yunnan ( Fig. 35 , black square).

Bionomics. The species was sifted from the forest and shrub litter (according to the label: pasture & shrubs, oak shrubs, Rhododendron , bamboo, secondary pine forest, litter, moss and mushrooms sifted) at elevations of 2700–3104 m a.s.l.

Derivatio nominis. We are pleased to name this species after our friend and colleague, a well-known carabidologist, Dr. David W. Wrase (Berlin), who always provided us with rich and valuable material.

Junnanotrechus triporus Belousov & Kabak , sp. n. ( Figs. 17–20 )

Type material: Holotype: CHINA: 1(1)♂, „ China (Yunnan), Dali Bai Aut. Pref., mount range E Weishan, 12 km NE Weishan, 2630–2660 m, 25°17´02–15´´ N / 100°22´23–30´´ E, (scrub with pines and bamboo, litter sifted), 15.09.2009, (M. Schülke) [54]( ZISP) { Fig. 35 : 10}. Paratypes: CHINA: 2(2)♂, 2♀, collected with the holotype ( CDW, CBK); 1♀, “ China (Yunnan), Dali Bai Aut. Pref., mount range E Weishan, 12 km NE Weishan, 2630–2660 m, 25°17´02–15´´ N / 100°22´23–30´´ E, (scrub with pines and bamboo, litter sifted), 15.09.2009, (D.W. Wrase) [54A]( CDW) { Fig. 35 : 10}.

Description. Small-sized (smallest species of genus), body length 2.68–3.18 (2.91) mm, habitus oblong, oval, strongly convex, with rather short legs and antennae ( Figs. 17–18 ). Color of upper-side nearly concolorous reddishbrown, posterior half of head occasionally darker than remainder of dorsum; legs and antennae paler, uniformly pale brownish.

Head oblong, medium-sized, clearly narrower than pronotum. Eyes small, regularly shaped, rather strongly convex; tempora long, evenly and moderately convex, covered with sparse and long hairs. Head across eyes approximately as wide as across tempora. Supraorbital carina rather short, markedly isolated from eye, i.e. not extended on upper edge of eye. Frontal furrows regularly arched, more deeply impressed anteriorly and behind middle; parietal impression very shallow. Supraorbital pores well-defined, anterior one strongly, posterior one barely foveolate, located on imaginary lines clearly convergent posteriad. Inner clypeal seta weaker than outer one. Labrum weakly concave. Mandibles slightly elongate, gradually and weakly curved. Tooth on right mandible tridentate, median denticle poorly distinct, premolar and distal denticle moderately spaced for genus. Labial tooth relatively short, triangular-shaped, its apex bifid, clearly grooved ventrally. 7 submental setae (3 median setae irregularly placed). Mental suture indistinct. Palpi long and slender.

Pronotum convex; clearly wider than long, only moderately constricted toward base, its sides briefly rounded anteriorly, straight posteriorly, normally without sinuation before hind angles. The latter rather large, obtusangular, rounded apically. Basal margin distinctly lobed, straight medially and obliquely truncate laterally. Anterior margin strongly convex, anterior angles completely lacking. Lateral depression shallow and wide, clearly expanded posteriorly. Lateral border continuous. Prebasal transverse impression deep, consisting of 5 equidistant foveae; basal surface finely and shallowly rugulose. Basal foveae small and very shallow. Apical transverse impression singular, irregularly marked; apical surface of pronotum smooth or shallowly rugulose. Discal foveae small normally lacking. Median line rather weakly impressed, though distinct, becoming deeper at level of prebasal and apical transverse impressions.

Elytra oblong, broadest near mid-length, moderately and evenly convex. Humeri broadly rounded, sides behind them straight and then broadly ovate. Both elytra conjointly rounded, preapical sinuation shallow. Lateral margins moderately and evenly expanded throughout. First discal stria well-impressed and sharply engraved in anterior part, becoming shallower posteriad and completely disappearing in apical third, distinctly punctured. Striae 2 and 3 shallowly impressed, only partly traceable, occasionally recognizable as a row of punctures. Apical striole long and straight, well-engraved, interrupted anteriorly a little before umbilicate pore 8. Interspaces 2 and 3 approximately equal in width and about 1.5 times as wide as the first one. Parascutellar pore well-developed, with adjacent short striole. Three discal setigerous pores on each elytron of which two anterior pores attached to stria 3, posterior one – on site of stria 4, preapical pore lacking. All setigerous pores strongly foveolate. Angulo-apical seta markedly shorter than exterior one, located approximately at the same distance from the latter than from the suture. Humeral group of umbilicate series regularly aggregated, umbilicate pores 2 and 6 most approached to lateral margin, umbilicate pore 7 relatively varying in position.

Microsculpture reduced, more visible on pronotum and elytra, consisting of fine strongly transverse meshes, surface of both pronotum and elytra clearly iridescent. Dorsal surface with tiny errect hairs, 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. Ventrites 2 and 3 fused (medially without distinct suture between them but with a transverse impression). Only one paramedian setae on each side of ventrite. Female with two pairs of setae along posterior edge of anal sternite, male with one pair.

Front tibiae very slightly sinuate, rather thick, sharply grooved externally, without clear pubescence on anterior surface. Metatarsi short.

Sexual dimorphism. Similarly to other congeners, females of this species have wider elytra than males with ranges even not overlapped but number of specimens too small to reach significance level.

Variation. In one specimen anterior setigerous pore lacking on left elytron.

Aedeagus ( Figs. 19–20 ) medium-sized, rather thin, with maximum width near mid-length in both lateral and dorsal view. Ventral margin of median lobe relatively evenly concave, only near apex clearly sinuate; basal part proportionally relatively large, apex small and button-like modified. Sagittal aileron well-developed; basal orifice not emarginate. Endophallus armature represented by a moderately sclerotized and complicatedly folded scaly field; in dorsal view, two major pieces recognizable: one in latero-proximal and another in dorso-distal position. Parameres strongly obtusangularly curved clearly before their mid-length, with thin and parallel-sided distal portions, each bearing 4 apical setae and deprived of ventral apophyses; left paramere clearly longer. Apices of both parameres either strongly protruding or, at least, strongly obliquely truncate, dorsal seta, therefore, clearly shifted proximally. Genital segment ( Fig. 20 d) with rather thick fused proximal part as compared with other congeners.

Comparative notes. Among all members of the genus J. triporus sp. n. is easily distinguished by its very small body size and complete reduction of the preapical setigerous pore.

Distribution. Mountain range E Weishan, 12 km NE Weishan, Yunnan: Dali Bai Autonomous Prefecture ( Fig. 35 , white triangle).

Bionomics. The species was sifted from the litter of scrub with pines and bamboo, at elevations of 2630–2660 m a.s.l.

Junnanotrechus schuelkei Belousov & Kabak , sp. n. ( Fig. 8 )

Type material: Holotype: CHINA: 1♀, “ China (Yunnan), Pu’er Pref., Ailao Shan, 37 km NW Jingdong, 24°45´12´´ N / 100°41´24.5´´ E, 2300 m, (devastated forest remnant, litter/dead wood sifted), 13.09.2009, (M. Schülke) [48]( ZISP) { Fig. 35 : 11}.

Description. Medium-sized species with body length weakly below average for genus, with narrow and strongly convex body, markedly constricted at pronotal base ( Fig. 8 ). Antennae long and relatively thick. Color of upper-side dark amber brownish; disk of head nearly blackish; legs and antennae paler, uniformly pale brownish.

Head a little above average in size, oblong. Eyes small, rather strongly convex; tempora long, evenly and moderately convex, covered with sparse and long hairs. Head across eyes markedly wider than across tempora. Supraorbital carina long, continuous, fused with upper edge of eye. Frontal furrows regular, deep and continuous, arcuate, only slightly impressed in posterior parts; parietal impression rather weak. Supraorbital pores welldefined, anterior one strongly, posterior one moderately foveolate, located on imaginary lines clearly convergent posteriad. Additional small seta between supraorbital setae (may be a part of temporal pubescence). Inner clypeal seta clearly shorter than outer one. Labrum weakly concave. Mandibles slightly elongate, gradually and weakly curved. Tooth on right mandible worn, tridentate, median denticle poorly distinct, premolar and distal denticle moderately (for genus) spaced. Labial tooth relatively long, with blunt apex, grooved ventrally. 5 submental setae (right median seta lacking). Palpi long and slender.

Pronotum nearly as long as wide (only 1.04 times wider), strongly constricted toward base, convex; its sides strongly rounded anteriorly, barely sinuate behind anterior lateral seta, broadly rounded posteriorly and briefly sinuate before hind angles. The latter small, obtusangular, blunt apically, weakly protruding. Basal margin distinctly lobed, its lateral portions obliquely truncate. Anterior margin strongly salient, anterior angles completely rounded off. Lateral gutter narrow, only a bit wider at both anterior and posterior lateral setae. Lateral border continuous and evenly developed. Prebasal transverse impression rather deep but not so sharply engraved as in some relatives, consisting of 5 equidistant impressions including median one and basal foveae; these small impressions irregularly extended posteriad rendering basal surface roughly rugose. Basal foveae small and moderately impressed. Apical transverse impression simple, distinctly engraved, only slightly interrupted medially and with a few small irregular impressions here; apical surface of pronotum shallowly 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, rather short, broadest a little behind mid-length, strongly convex, with steep lateral slopes, moderately steep apical slope, markedly impressed along suture. Humeri marked, slightly angular, sides behind them straight and then broadly ovate. Both elytra conjointly and broadly rounded; preapical sinuation extremely shallow. Lateral gutter very narrow. First discal stria well-impressed and sharply engraved in anterior part, becoming shallower posteriad and completely disappearing in apical third, distinctly punctured. Second stria shallow but distinct, at least so in basal two thirds, very finely punctured. Third discal stria vestigial, more or less traceable between two anterior discal setigerous pores. Apical striole long, well-engraved, straight, interrupted anteriorly just behind umbilicate pore 7. Parascutellar pore well-developed, with adjacent short striole. Apart from preapical pore, three discal setigerous pores on each elytron of which two anterior pores located in stria 3, posterior one—on site of stria 4. All setigerous pores strongly foveolate. First interspace very narrow, clearly sinuate in basal quarter of elytra; second interspace unusually wide, more than twice as wide as the first one. Preapical pore in usual position, located approximately at level of anterior termination of apical reccurrent striole. Apical triangle strongly elongate, its inner side on lines convergent posteriad; exterior pore located approximately twice close to preapical pore than to angulo-apical one, the latter strongly removed from suture. Humeral group of umbilicate series weakly aggregated: umbilicate pore 1 markedly removed from others, umbilicate pore 2 located just near lateral gutter, all other pores strongly shifted from lateral margin. Distance between umbilicate pores 7 and 8 approximately twice as long as between umbilicate pores 5 and 6. All umbilicate pores within humeral group very strongly foveolate and clearly isolated from each other. Umbilicate pores of both median (5–6) and preapical (7–8) groups located within two short fragments of stria 8.

Microsculpture strongly reduced, at most, barely distinguishable on posterior part of head and elytra, a little more distinct on disk of pronotum, consisting here of transverse lines. The very basal surface of pronotum covered with well-developed isodiametric mesh. Surface of both pronotum and elytra strongly shining, the latter with more distinct iridescence. Dorsal surface completely glabrous including lateral borders of both pronotum and elytra. All dorsum finely micropunctured.

Ventrites irregularly microsculptured, a little more strongly near anterior margin.

Only one paramedian setae on each side of ventrite. Female with two pairs of setae along posterior edge of anal sternite.

Front tibiae weakly sinuate and rather slender, at least so in female specimen known, distinctly grooved externally, their anterior surface nearly glabrous, only with vestigial hairs in apical quarter.

Comparative notes. Among all members of the genus with the complete pattern of the chaetotaxy, i.e. with four setigerous pores on each elytron, J. schuelkei sp. n. is distinct in having the first elytral stria well-impressed and setigerous pores foveolate and strongly shifted outwards. This species seems to be most closely related to J. triporus sp. n. sharing with it the following characters: the first elytral stria well-impressed and clearly punctured, not large body size and similarly shaped pronotum with fairly slight and oblique lateral emarginations of the basal margin. Since J. schuelkei sp. n. is known only for a single female specimen, its true systematic position should be re-assessed once male specimens will be available.

Distribution. The first member of the genus known from the Ailao Shan Mountain Range, Yunnan: Pu’er Prefecture ( Fig. 35 , black triangle).

Bionomics. The label bears the following data: devastated forest remnant, litter/dead wood sifted. The holotype specimen was found at an elevation of 2300 m a.s.l.

Derivatio nominis. We are pleased to name this species after our colleague, Dr. Max Schülke (Berlin).

Figures

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

FIGURE 12. Male genitalia of Junnanotrechus wrasei sp. n.: a—lateral view, b—dorsal view, c—parameres, d, e—genital segment.

FIGURE 35. Distribution of Junnanotrechus species.

FIGURES 13 – 14. Junnanotrechus baehri Deuve, habitus: 13 — male; 14 — female.

FIGURES 15 – 16. Male genitalia of Junnanotrechus baehri Deuve: a—lateral view, b—dorsal view.

FIGURES 10 – 11. Junnanotrechus wrasei sp. n., habitus: 10 — male paratype; 11 — female paratype.

FIGURES 17 – 18. Junnanotrechus triporus sp. n., habitus: 17 — male paratype; 18 — female paratype.

FIGURES 19 – 20. Male genitalia of Junnanotrechus triporus sp. n.: a—lateral view, b—dorsal view, c—genital segment.

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

Tables

TABLE 2. Statistically significant differences between Junnanotrechus baehri, J. microps and J. wrasei (p ≤ 0.05). Character abbeviation as indicated in Material and Methods.

Indices	Range (average), N	Range (average), N
J. baehri and J. microps
EL/BH	1.88–2.30 (2.06), 12	2.03–2.37 (2.20), 21
(D4/EL) x 100	56.8–66.2 (60. 7), 12	51.6–61.8 (55.9), 22
J. baehri and J. wrasei
PW/PL	1.04–1.12 (1.08), 12	1.11–1.21 (1.15), 10
EL/EW	1.42–1.52 (1.48), 12	1.38–1.47 (1.43), 10
J. microps and J. wrasei
AL/EL	0.94–1.03 (0.99), 20	0.96–1.14 (1.07), 10
L3/W3	1.50–2.00 (1.72), 21	1.72–2.14 (1.94), 10
PW/PL	1.05–1.12 (1.08), 22	1.11–1.21 (1.15), 10
(D4/EL) x 100	51.6–61.8 (55.9), 22	55.6–63.9 (59.5), 10