Gabrius coryndoni, Cameron, 1942

Hromádka, Lubomír, 2014, A review of the Afrotropical Gabrius coryndoni species group (Coleoptera: Staphylinidae: Staphylininae), Acta Entomologica Musei Nationalis Pragae 54 (2), pp. 555-562 : 557-559

Key to species of the Gabrius coryndoni species group

1 Smaller species, body length 4.0– 4.2 mm. ..................................................................... 2

– Larger species, body length 4.6–5.9 mm. ....................................................................... 3

2 Head square, median lobe with apical part parallel-sided, long and slender, not as wide as width between branches of paramere, in lateral view more elongate ( Figs 22–23 ) ...... ................................................................................................ G. negus Tottenham, 1956

– Head trapezoidal, apical part of median lobe conically narrowed into short obtuse apex ( Figs 16–17 ). .................................................................................... G. lepidina sp. nov.

3 Antennae unicoloured, black or brown. ......................................................................... 4

– Antennae with antennomeres 1 or 1–2 differently coloured than remainig antennomeres. .................................................................................................................................. 5

4 Antennae black and long, reaching posterior margin of pronotum when reclined, whole body black, legs brown, head slightly wider than long (ratio 18: 16). Genitalia as in Figs 19–21 . .................................................................................. G. lethifer Tottenham, 1956

– Antennae brown and short, reaching posterior fourth of pronotum when reclined, pronotum and abdomen brown-black, elytra brown-red, legs yellow, tibiae infuscate. Head distinctly wider than long (ratio 20: 16). Genitalia as in Figs 4–6 . .................................................. ............................................................................................ G. coryndoni Cameron, 1942

5 Smaller species, body length 4.6–4.9 mm. ..................................................................... 6

– Larger species, body length 5.2–5.8 mm .........................................................................9

6 Antennae short, reaching midlength of pronotum or posterior fourth of pronotum when reclined. .......................................................................................................................... 7

– Antennae long, reaching posterior ¿fth or posterior margin of pronotum when reclined...........................................................................................................................................8

7 Antennae reaching midlength of pronotum when reclined. Apical portion of median lobe distinctly narrowed into very long and very narrow apex ( Fig. 34 ). ................................. ........................................................................................................... G. amadina sp. nov.

– Antennae reaching posterior fourth of pronotum when reclined. Apical portion of median lobe in lateral view ( Fig. 11 ), widened and with truncate apex. ....................................... ........................................................................................... G. fleuxellus Tottenham, 1956

8 Antennae reaching posterior ¿fth of pronotum when reclined. Apical portion of median lobe in lateral view as in Fig. 29 . ........................................ G. ramifer Tottenham, 1956

– Antennae reaching posterior margin of pronotum when reclined. Genitalia as in Figs 13–15 . ................................................................................ G. huendus Tottenham, 1956

9 Antennae short, reaching posterior fourth or ¿fth of pronotum when reclined. .......... 10

– Antennae long, reaching posterior margin of pronotum when reclined. .......................11

10 Antennae reaching posterior fourth of pronotum when reclined, apex of median lobe ( Fig. 31 ), wider than in following species (compare with Fig. 1 ). ............................................ .............................................................................................. G. vulcanus Cameron, 1950

– Antennae reaching posterior ¿fth of pronotum when reclined, apex of median lobe ( Fig. 1 ) narrower than that in previous species (compare with Fig. 31 ). ................................... ................................................................................................ G. amans Tottenham, 1963

11 Elytra wider than long (ratio 27: 23), median lobe parallel-sided, apex almost straight ( Fig. 25 ). ............................................................................. G. obnixus Tottenham, 1956

– Elytra as long as wide, median lobe slightly narrowed towards obtusely rounded apex ( Fig. 7 ). ............................................................................... G. dolosus Tottenham, 1956

Figures

Figs 1–24. Genitalia of representatives of the Gabrius corydoni group (aedeagus in ventral and lateral views and detail of parameres in ventral view).1–3 – G. amans Tottenham, 1963; 4–6 – G. coryndoni Cameron, 1942; 7–9 – G. dolosus Tottenham, 1956; 10–12 – G.Àexuellus Tottenham, 1956; 13–15 – G. huendus Tottenham, 1956; 16–18 – G. lepidina sp. nov.; 19–21 – G. lethifer Tottenham, 1956; 22–24 – G. negus Tottenham, 1956

Figs 25–36. Genitalia of representatives of the Gabrius corydoni group (aedeagus in ventral and lateral views and detail of parameres in ventral view). 25–27 – G. obnixus Tottenham, 1956; 28–30 – G. ramifer Tottenham, 1956; 31–33 – G. vulcanus Cameron, 1950; 34–36 – G. amadina sp. nov.