Panurginus

Key for the genus Panurginus of Siberia, Far East of Russia and allied areas

Male

1. Labral plate longitudinal, flattened latero-laterally, or knobby.—Metasomal terga shiny, with small punctures. Wings yellowish-brown, veins yellow to light-brown. S6 without lateral hair tuft (Fig. 93). S8 apical plate with basal hill not defined and postero-lateral angles bent ventro-anteriorly (Figs 88–90). Body length 5–8 mm.— Russia (S Primorskiy Kray), Japan, Korea ...................................................................................... P. crawfordi

- Labral plate transverse, flattened dorso-ventrally............................................................ 2

2. Middle and hind TM2–TM4 conical, or only TM4 cordate. S6 without lateral hair tuft. S7 apical teeth narrowly divided one from another. T2&T3 smooth or shagreened............................................................... 3

- Middle and hind TM2–TM4 cordate. S6 with lateral hair tuft. S7 apical teeth widely shifted one from another. T2&T3 shagreened............................................................................................. 8

3. T2&T3 shagreened................................................................................... 4

- T2&T3 smooth or tessellated........................................................................... 5

4. Middle basitarsus yellow. S6 posterior margin medially with arched elevation inside pubescent (Fig. 111). Genal area with longitudinal depression.—Pedicel transverse, F1 equilaterally triangular, as long as F2. Body length 6–8 mm.—NW Europe, Russia (Siberia and the Far East from Magadan to Primorskiy Kray)......................................... P. ro m a n i

- Middle basitarsus brown. S6 posterior margin medially straight (Fig. 117). Genal area without longitudinal depression.—Pedicel as long as wide, F1 elongate. Body length 5.5 mm.—N China ....................................... P. n i g r i p e s

5. Clypeus with antero-lateral angles two times longer than wide basally (Fig. 107). S7 apical teeth long, narrow, in the same plane with disc (Fig. 110). S8 reduced to small, narrow plate with plane margins (Figs 108, 109). Body length 5–5.5 mm.— Russia (Primorskiy Kray)....................................................................... P. arsenievi

- Clypeus with antero-lateral angles not protruded. S7 apical teeth bent ventrally, wide. S8 as usual: with disc, neck and apical plate............................................................................................... 6

6. Wings without color fumigation, veins yellow. S6 apical arch narrowly oval, with apical angles pooled ventrally and pubescent; median excavation inside impubescent (Figs 102, 103). S7 apical teeth wide and long, a few times longer than posterior margin of sternum. Body length 4.5–6 mm.—Europe, Russia (E Siberia)................................. P. labiatus

- Wings brownish, veins light brown. S6 apical arch wider than deep, inside densely pubescent (Fig. 71). S7 apical teeth narrowly triangular (lateral view), shorter than posterior margin of sternum (Fig. 70).................................. 7

7. Labral plate rounded (Fig. 65). Scutum and scutellum slightly shagreened, with pits 0.5−2 pit diameters apart. Body length 4.5–6 mm.— Russia (E Siberia, Far East), Mongolia .................................................... P. n i g e r

- Labral plate widely triangular (Fig. 74). Scutum and scutellum glossy with pits 1−5 pit diameters apart. Body length: male 5 mm.— Russia (SW Siberia), NW Mongolia ....................................................... P. m u r a v i o v i

8. Labral plate yellow. Basitarsi short: middle 3 times, hind 2.5 times as long as wide. Body length 6.5–7 mm.— Mongolia .................................................................................................. P. k o z l o v i

- Labral plate black. Basitarsi relatively longer............................................................... 9

9. Labral plate strongly narrowed apically or apically angled, almost triangular. Pubescence more plentiful than usually..... 10

- Labral plate slightly narrowed apically, trapezoid or rounded.................................................. 12

10. Scutum smooth, only anteriorly delicately tessellate, with deep, round pits dense to confluent (10−20 µm / 0.5−1). Wing transparent. Middle basitarsus enlarged towards apex. S6 apical elevation deeply arcuate (Fig. 22).— S8 apical plate with basal hill 90˚, not protruded (lateral view). Gonostylus about 4 times as long as wide (Fig. 15). Body length 8 mm.—E Kazakhstan ........................................................................................... P. obruchevi

- Scutum entirely shagreened, with deep, round pits dense to confluent. Wing brown fumigated. Middle basitarsus enlarged on distal 2/3. S6 apical elevation shallowly arcuate (Fig. 31).................................................... 11

11. S8 apical plate with basal hill strongly pooled dorsally, as long as wide and less than 90˚ in lateral view (Fig. 29). Body length 6–7 mm.— Russia (Khabarovsk Kray); Mongolia .................................................. P. alpotanini

- S8 apical plate with basal hill short, directed posteriorly, ca 90˚ in lateral view (Fig. 38). Body length 6–8 mm.— Russia (Siberia, Zabaykalskiy Kray, Altai Mountains)........................................................... P. mikh no

12. S6 posterior margin medially straight, with short hair fringe and lateral spine long and narrow (Fig. 52); ventral hair tufts short, do not overlapping posterior margin of the sternum. S7 apical bifurcation with bottom straight (Fig. 50). Gonostylus enlarged subtriangularly, with maximal width at lower third (Fig. 46).—Middle basitarsus 4–4.5 times as long as wide. T1 entirely shagreened. Body length 6–7.5 mm.—Europe (Alps), Russia (Siberia), Mongolia ............................ P. h e r z i

- S6 posterior margin medially arcuate, inside with wide hair fringe (Fig. 1); ventral hair tufts long, overlapping posterior margin. S7 apical bifurcation arcuate (Fig. 7). Gonostylus rectangularly enlarged (Fig. 3)—Middle basitarsus 3.5–4 times as long as wide. T1 partially smooth or delicately tessellate. Body length 6–8 mm.—Caucasus, Russia (Karachaevo-Cherkessia; Samara Oblast, Orenburg Oblast, Bashkortostan), Kazakhstan ......................................... P. alticolus