Oedichirus, Rougemont, 2018

Rougemont, Guillaume de, 2018, New oriental Oedichirus (Staphylinidae, Paederinae, Pinophilini), Linzer biologische Beiträge 50 (1), pp. 461-536 : 512-513

Key 3: species of Oedichirus known from Thailand

1 Elytra bicolorous, black and red, head black.......................................................................2

- Elytra unicolorous, black or brown .....................................................................................6

2 First four exposed abdominal segments red; legs entirely testaceous..................................3

- First three exposed abdominal segments red; knees and most of tibiae infuscate (see also key to O. Alatus group)................................................................................................4

3 Length of fore-body: 3.4 mm; elytra larger, more sparsely punctate, red portion occupying almost half of their length (Fig. 3h); male sternite VII: Fig. 3s8; aedoeagus: Fig. 3arl ................................................................................................ chapmani CAMERON

- Length of fore-body: 2.1 mm; elytra proportionately smaller, more densely punctate, the red portion only occupying one quarter of their length (Fig. 8h); male sternite VIII: Fig. 8s8; aedoeagus: Fig. 8arl................................................................. (sihanouki nov.sp.)

4 Habitus: Fig. 9h; male sternite VIII: Fig. 9s8; aedoeagus: Fig. 9arl; vulvar plate: Fig. 9vp ................................................................................................................ vexans nov.sp.

- Sexual characters otherwise ................................................................................................5

5 Male sternite VIII: Fig. 12s8: vulvar plate: Fig; 12vp ................................................ sp. A4

- Vulvar plate: Fig. 10vp............................................................................................... sp. A1

6 Bicolorous species, head, elytra and abdominal segments 7-8 black, pronotum and abdominal segments 3-6 red; punctures of tergites arranged in transverse rows.................7

- Unicolorous black or brown species; punctures of abdominal tergites disposed randomly .............................................................................................................................8

7 Elytra large, as long as pronotum, densely punctuate with prominent humeral angles; habitus: Fig. 14h; aedoeagus: Fig. 14arl............................................... longipennis KRAATZ

- Elytra small, much shorter than pronotum, sparsely punctuate, humeral angles obsolete; habitus: Fig. 17h.................................................................................. kochangensis nov.sp.

8 Fully winged species, elytra elongate, ample, convex, humeral angles prominent; body black, legs entirely testaceous .............................................................................................9

- Micropterous species, humeral angles obsolescent ...........................................................10

9 Smaller species, length of fore-body: 4 mm; habitus: Fig. 45h; aedoeagus: Fig. 45arl ......... ................................................................................................................ lannaensis nov.sp.

- Larger species, fore-body: 5 mm; habitus: Fig. 46h; aedoeagus: Fig. 46arl .......................... .................................................................................................................. (laoticus nov.sp.)

10 Elytra elongate, of characteristic shape (Fig. 42h); body black, knees broadly and deeply infuscate; abdomen entirely microsculptate............................... strictipennis nov.sp.

- Elytra small, as long as broad or transverse; knees unicolorous, testaceous; abdomen not entirely microsculptate ................................................................................................11

11 Larger species,> 8 mm; ventral sclerite of aedoeagus with a pair of large asymmetrical lamellate processes (Figs 43 arl,); male 8 th sternite: Fig. 43s8)................ birmanus FAUVEL

- Smaller species, <8 mm; ventral sclerite of aedoeagus with a single process ..................12

12 Habitus: Fig. 47h; puncturation of tergites V-VII finer, sparser and clearly arranged in transverse rows; aedoeagus: Fig. 48arl............................................ mediosiamensis nov.sp.

- Habitus: Fig. 48h; puncturation of tergites V-VII coarse, dense and disposed randomly aedoeagus: Fig. 48arl..................................................................................... uncifer nov.sp.