Junnanotrechus 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 : 434

Key to species of Junnanotrechus Uéno & Yin, 1993

1. First discal stria deeply and sharply engraved, distinctly punctured, at least in basal half of elytra..................... 2

- Discal striae of elytra reduced, even first stria indistinct, at most, partly traceable.................................. 3

2. Each elytron with only three setigerous pores, preapical pore lacking. All discal setigerous pores weakly foveolate. Their location is the same as in most of other members of the genus. Elytra very briefly but distinctly pubescent. Pronotum only weakly constricted posteriad, its sides without distinct sinuation before hind angles, pronotal base rather smooth. Body size very small, its length 2.68–3.18 (2.91) mm. Yunnan: vicinity of Weishan..................................... J. triporus sp. n.

- Each elytron with a row of four setigerous pores, i.e. preapical pore present. Both discal striae and discal setiferous pores markedly shifted outwards. Discal setigerous pores and even umbilicate pores strongly foveolate. Elytra without distinct pubescence; at most, a few tiny hairs discernible, mostly near suture of elytra. Pronotum strongly constricted posteriad, its sides distinctly sinuate before hind angles, pronotal base rudely rugose. Body size average for genus, length 3.38 mm. Yunnan: Ailao Shan.............................................................................. J. schuelkei sp. n.

3. Dorsal surface of both pronotum and elytra pubescent: tiny suberect hairs visible not only on disk of pronotum and elytra but also on their lateral borders. Supraorbital carinula of usual length not extended to upper posterior edge of eye, disappearing near the latter........................................................................................ 4

- Dorsal surface of both pronotum and elytra completely glabrous, without hairs. Only posterior part of lateral borders of pronotum with a few barely distinguishable hairs. Supraorbital carinula very long, extended to upper posterior edge of eye and often clearly widened here.................................................................................. 6

4. Pronotum without distinct pedunculate lobe at base behind prebasal impression, the latter reaching laterally basal margin of pronotum which only weakly emarginate here. Lateral border of pronotum well-developed throughout. Eyes flatter. Antennae becoming paler toward apices. Aedeagus ( Figs. 23–26 ) with apex strongly curved up and backward in lateral view. Body length 3.00–3.46 (3.15) mm. Yunnan: W of Yunxian Town................................... J. koroleviellus sp. n.

- Pronotum clearly pedunculate, its base lobed due to lateral parts of basal margin strongly emarginate and prebasal transverse impression sharply impressed; pronotal hind angles strongly shifted anteriad. Lateral border of pronotum either reduced or very fine near posterior lateral setigerous pore. Eyes more convex. Antennae paler at their base. Aedeagus with apex not directed backward.................................................................................... 5

5. Smaller, body rather briefly ovate, appendages thin. Hind angles of pronotum extremely strongly shifted forwards ( Fig. 41 ). Lateral border of pronotum reduced between anterior and posterior lateral setae. Antennae obscured beginning with third antennomere. Head extraordinarily large, markedly wider across tempora than across eyes. First discal stria on basal slope of elytra between scutellum and parascutellar setigerous pore evenly impressed and gradually sinuate. Elytra weakly truncate apically. Apical triangle very long. Aedeagus ( Fig. 33 ) rather small, obtusangularly curved at base, button-like apex without ventral protruding in lateral view; parameres of medium length, less sharply curved. Body length 3.11–3.64 (3.36) mm. Yunnan: Daxue Shan Mountain E of Mengsa Village................................................. J. elegantulus sp. n.

- Larger, body oblong, appendages rather thick. Hind angles of pronotum typical of the genus: with well-developed lobes of hind angles and well-developed lateral parts of basal margin ( Fig. 39 ). Lateral border of pronotum distinct throughout between anterior and posterior lateral setae. Antennae obscured beginning with second antennomere. Head average for genus, approximately as wide across tempora as across eyes. First discal stria on basal slope of elytra with sharply engraved comma-like fovea and often small tubercle in front of parascutellar striole. Elytra commonly rounded apically. Apical triangle only slightly elongate. Aedeagus ( Fig. 29–30 ) large, nearly rectangularly curved at base, button-like apex with distinct ventral protruding in lateral view; parameres proportionally very short, sharply curved. Body length 3.57–4.16 (3.87) mm. Yunnan: Daxue Shan Mountain located W of Niutoushan Village.................................................... J. oblongus sp. n.

6. Smaller and more gracile, eyes pedunculate. Aedeagus ( Fig. 42 ) very slender and elongate. Yunnan: Jizu Shan Mountain Range......................................................................... J. exophtalmus Deuve, 1998

- Larger and more robust, eyes less pedunculate. Aedeagus larger and thicker ( Figs. 9 , 12 , 15–16 )...................... 7

7. Pronotum narrower, only slightly wider than long, slenderer as compared with rather ample elytra; posterior margins of hind angles of pronotum mostly rectilinear and obliquely truncate. Endophallus armature with well-defined scaly patch near left wall of aedeagal tube ( Fig. 9 b). Body length 3.24–3.76 (3.49) mm. Southern part of the Diancang Shan Mountain Range..................................................................................... J. microps Uéno & Yin

- Pronotum more massive as compared with relatively narrow and more distinctly depressed elytra; posterior margins of hind angles of pronotum mostly more or less convex, nearly perpendicular to oblong axis of body. Endophallus armature consisting of poorly sclerotized scaly folds, without well-defined scaly patch near left wall of aedeagal tube ( Figs. 12 b, 16 b)...... 8

8. Pronotum wider, 1.11–1.21 (1.15) times as wide as long, its lateral margins distinctly convex at level of anterior lateral seta, normally without weak sinuation; anterior surface of pronotum usually smooth, without punctures and wrinkles in front of prebasal transverse impression. Aedeagus smaller, less strongly curved in lateral view, its apex broadly truncate, without median protruding ( Fig. 12 ) in dorsal view. Endophallus armature with a few more or less compact scaly areas. Body length 3.33–3.72 (3.57) mm. Northern part of the Diancang Shan Mountain Range.................................... J. wrasei sp. n.

- Pronotum narrower, only marginally wider than long, PW/PL 1.04–1.12 (1.08); its lateral margins barely convex at level of anterior lateral seta, normally with weak sinuation here; anterior surface of pronotum usually with a few punctures and wrinkles in front of prebasal transverse impression. Aedeagus bigger, very strongly curved in lateral view, its apex truncate, with a small median protruding in dorsal view ( Fig. 16 ). Endophallus armature with narrow bands of feebly sclerotized scaly areas. Body length 3.24–3.80 (3.53) mm. Jizu Shan mountains.......................................... J. baehri Deuve

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 33. Male genitalia of Junnanotrechus elegantulus sp. n.: a—lateral view, b—dorsal view, c—genital segment.

FIGURE 42. Male genitalia of Junnanotrechus exophtalmus Deuve, lateral view (from Deuve, 2011).

FIGURES 23 – 26. Male genitalia of Junnanotrechus koroleviellus sp. n.: a—lateral view, b—dorsal view, c—parameres, d—genital segment.

FIGURES 36 – 41. Junnanotrechus spp, pronotum: 36 — J. baehri Deuve; 37 — J. triporus sp. n.; 38 — J. koroleviellus sp. n.; 39 — J. oblongus sp. n.; 40 — J. schuelkei sp. n.; 41 — J. elegantulus sp. n.

FIGURES 29 – 30. Male genitalia of Junnanotrechus oblongus sp. n.: a—lateral view, b—dorsal view, c—genital segment.

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