Seeversiella paramoana Gusarov

Gusarov, Vladimir I., 2003, A revision of the genus Seeversiella Ashe, 1986 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 142, pp. 1-102 : 94-95

28. Seeversiella paramoana Gusarov , sp. n. ( Figs. 372­384 )

Type material. Holotype ,, COSTA RICA: Cartago: Cerro Chirripó, Valle de los Conelos, 9°28'37"N 83°29'23"W, 3600 m, paramo shrub litter (R.Anderson), 26.vi.1999 ( KSEM).

Paratypes: COSTA RICA: Cartago:, 6, same data as the holotype ( KSEM).

Diagnosis. Seeversiella paramoana can be distinguished from other species of Seeversiella by having brownish yellow body; small eyes (temple length to eye length ratio 4.0­5.0); glossy pronotum with weak isodiametric microsculpture; elytra much shorter than pronotum; wings reduced, shorter than elytra; the distinct shape of aedeagus ( Figs. 376­380, 382­384 ) and spermatheca ( Fig. 381 ).

Seeversiella paramoana differs from S. flavida in having tergum 8 with four pairs of macrosetae; and pointed apex of median lobe (in parameral view) ( Figs. 377­378 ).

Seeversiella paramoana differs from S. adusta in having tergum 8 with four pairs of macrosetae; and longer proximal portion of spermatheca ( Figs. 381 ; 358).

Description. Length 2.2­2.4 mm, pronotal width 0.40­0.47 mm. Body brownish yellow to light brown.

In all external character states S. paramoana is very similar to S. flavida , but differs in the characters listed in the diagnosis.

Aedeagus as in Figs. 376­380, 382­384 .

Spermatheca as in Fig. 381 .

Distribution. Known from Cerro Chirripó, Costa Rica ( Fig. 389 ).

Natural History. Seeversiella paramoana was collected in paramo shrub litter at altitude of 3600 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 372 ­ 375. Abdominal segment 8 of Seeversiella paramoana Gusarov, sp. n. (372 ­ 373, holotype; 374 ­ 375, paratype from Cerro Chirripó, Costa Rica). 372 – male tergum 8; 373 – male sternum 8; 374 – female tergum 8; 375 – female sternum 8. Scale bar 0.2 mm.

FIGURES 376 ­ 384. Genitalia of Seeversiella paramoana Gusarov, sp. n. (376 ­ 380, 382 ­ 383, holotype; 381, 384, paratypes from Cerro Chirripó, Costa Rica). 376 – apex of left paramere; 377 – median lobe, parameral view; 378 – apex of median lobe, parameral view; 379 – median lobe, lateral view; 380 – apex of median lobe, lateral view; 381 ­ spermatheca; 382 – details of internal sac retracted into median lobe, abparameral view; 383 – details of internal sac retracted into median lobe, lateral view; 384 – everted internal sac, parameral view. Scale bar 0.1 mm (376, 378, 380 ­ 381, 384), 0.2 mm (377, 379, 382 ­ 383).