Ischnopoderona externa ( Fauvel, 1907 ) Fauvel, 1907

Paśnik, Grzegorz, 2007, Revision and phylogenetic analysis of the African genus Ischnopoderona (Scheerpeltz, 1974) new status (Coleoptera, Staphylinidae: Aleocharinae), Zootaxa 1412, pp. 1-54 : 23-24

Ischnopoderona externa ( Fauvel, 1907) , comb. n.

( Figs. 30–32 , Map 2)

Tachyusa externa Fauvel, 1907: 59 .

Tachyusa (Caliusa) externa: Bernhauer & Scheerpeltz, 1926: 586 . Amanota externa: Pace, 1995: 780 .

Type material. Lectotype (here designated): Ψ: [ Kenya], Nakuro, Rift Valley, externa Fvl. ( IRSNB). Paralectotypes: 3ΨΨ: same data as lectotype ( IRSNB).

Additional material. Democratic Republic of Congo: Faradje, 19.II.1930, A. Collart, 1ex ( IRSNB); Tshiobo N’Goy, Kitokula river, Mayumbe, 29.VI.1926, A. Collart, 1ex ( IRSNB). Gabon: Belinga, 20.I.1963, 12 exx ( MNHN); 21.I.1963, 10 exx ( MNHN); 22.I.1963, 1 ex ( MNHN); 23.I.1963, 3 exx ( MNHN); 26.I.1963, 6 exx ( MNHN); 1.II.1963, 4 exx ( MNHN); 4.II.1963, 1 ex ( MNHN); 8.II.1963, 1 ex ( MNHN); 10.II.1963, 4 exx ( MNHN); 16.II.1963, 1 ex ( MNHN); 22.II.1963, 5 exx ( MNHN); 26.II.1963, 20 exx ( MNHN); 4.III.1963, 1 ex ( MNHN); 16.III.1963, 1 ex ( MNHN); 18.III.1963, 1 ex ( MNHN); 4.IV.1963, 1 ex ( MNHN); 10.IV.1963, 1 ex ( MNHN); 27.IV.1963, 1 ex ( MNHN); 5.V.1963, 3 exx ( MNHN); 23.V.1963, 1 ex ( MNHN); Makokou, 16.I.1963, 1 ex ( MNHN). Kenya: Nakuro, Rift Valley, XII.1903, Ch. Alluaud, 10 exx ( MNHN).

Redescription. Body. Length 2.7–2.9 mm, convex, parallel­sided, glossy; body colour brown; tergites V– VII black, antennae brown with antennomeres 1–2 red, legs yellow to yellowish­red.

Head circular in outline, convex; eyes relatively large, moderately protruding from lateral contours of head, length of each seen from above subequal to that of postocular region; surface of head without microsculpture; puncturation minute, pinprick­like and moderately sparse. Antennae long, extending to 1/2 of elytra, slightly increasing in width apically, antennomeres 2 and 3 subequal in length, antennomeres 4–8 longer than wide, antennomeres 9–10 as long as wide, antennomere 11 nearly coniform.

Pronotum quadrate, convex, lateral sides sinuately narrowed to obtuse hind angles; before base with small and shallow transverse impression; surface without microsculpture; puncturation in basal 2/3 fine and dense, in anterior 1/3 minute, pinprick­like and sparse; pubescence at midline directed posteriorly in apical 1/4 and anteriorly in basal 3/4.

Elytra subquadrate, at suture as long as pronotal length at midline; surface without microsculpture; puncturation minute, pinprick­like and moderately sparse.

Abdomen widened posteriorly, bases of tergites III–V each with deep transverse impression, first two impressions coarsely punctate, third impression smooth, impunctate; tergal puncturation fine and moderately dense; surface without microsculpture.

Male. Aedeagus as in Figs. 30–31 .

Female. Spermatheca as in Fig. 32 .

Remarks. Ischnopoderona externa is very similar to I. interna , from which it can be distinguished by the antennomere 11 brown, coloured like preceding antennomeres (antennomere 11 yellow in I. interna ), the pronotum as long as wide (longer than wide in I. interna ) and by the shape of the spermatheca.

Distribution. Gabon, Kenya (Map 2).

Figures

FIGURES 30 – 32. Ischnopoderona externa (Fauvel): 30 — aedeagus in lateral view, 31 — aedeagus in ventral view, 32 — spermatheca.