Seeversiella adusta Gusarov

Gusarov, Vladimir I., 2003, A revision of the genus Seeversiella Ashe, 1986 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 142, pp. 1-102 : 89-90

26. Seeversiella adusta Gusarov , sp. n. ( Figs. 356­358 )

Type material. Holotype ,, COSTA RICA: San Jose/Cartago: Cerro Buenavista, km 89, Int. Amer. Hwy., 9°33'00"N 83°45'30"W, 3300 m, forest litter (R.Anderson), 8.vi.1997 ( KSEM).

Diagnosis. Seeversiella adusta can be distinguished from other species of Seeversiella by having uniformly brown body; small eyes (temples 3.3 times as long as eyes); elytra much shorter than pronotum; reduced wings (shorter than elytra); tergum 8 with three pairs of macrosetae; and by the distinct shape of spermatheca ( Fig. 358 ).

Seeversiella adusta differs from S. flavida in having shorter proximal portion of spermatheca ( Figs. 358 ; 371).

Description. Length 2.0 mm, pronotal width 0.43 mm. Body uniformly brown, legs brownish yellow.

In all external character states S. adusta is very similar to S. flavida , but differs in having shorter proximal portion of spermatheca ( Fig. 358 ).

Male unknown.

Distribution. Known from Cerro de la Muerte, Costa Rica ( Fig. 389 ).

Natural History. Seeversiella adusta was collected in forest litter at altitude of 3300 m.

Figures

FIGURE 389. Geographical distribution of eleven species of Seeversiella (with very short elytra) in the high mountains of Costa Rica. Isohypses 1000 m, 2000 m and 3000 m are shown. Areas above 2000 m are grey and those above 3000 m are solid black.

FIGURES 356 ­ 358. Abdominal segment 8 and spermatheca of Seeversiella adusta Gusarov, sp. n. (holotype). 356 – female tergum 8; 357 – female sternum 8; 358 ­ spermatheca. Scale bar 0.2 mm (356 ­ 357), 0.1 mm (358).