Seeversiella grandis Gusarov

Gusarov, Vladimir I., 2003, A revision of the genus Seeversiella Ashe, 1986 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 142, pp. 1-102 : 38-40

9. Seeversiella grandis Gusarov , sp. n. ( Figs. 126­134 )

Type material. Holotype ,, GUATEMALA: Quetzaltenango: 8 km SE Zunil, 2620 m, flight intercept trap (J.S.Ashe & R.Brooks), 19­21.vi.1993 ( KSEM).

Diagnosis. Seeversiella grandis can be distinguished from other species of Seeversiella by having large body (3.7 mm), brownish black body with brown elytra and legs; large eyes (temple length to eye length ratio 0.9); matte pronotum with strong isodiametric microsculpture; elytra longer than pronotum; wings fully developed; tergum 8 with four pairs of macrosetae; and the distinct shape of aedeagus ( Figs. 129­134 ).

Description. Length 3.7 mm. Body brownish black, elytra and legs brown.

Head surface matte, with fine isodiametric microsculpture, fine punctation, distance between punctures equals 1­2 times their diameter, anteromedial portion of the disc without punctation. Temple length to eye length ratio 0.9. Antennal article 2 as long as 3, article 4 elongate (ratio 1.2), 5 quadrate, 6­10 transverse (ratio 1.2­1.3).

Pronotum slightly transverse, 1.3 times as wide as head, width 0.74 mm, length 0.66 mm, width to length ratio 1.1, surface matte, with fine isodiametric microsculpture and fine punctation, distance between punctures equals ½­1 times their diameter. Elytra wider and longer (measured from humeral angle) than pronotum (pronotal length to elytral length ratio 0.8), 1.3 times wider than long, glossy, with fine and weak isodiametric microsculpture; with fine and asperate punctation, distance between punctures equal to ½­ 1 time their diameter. Wings fully developed.

Abdominal terga glossy, terga 3­6 with fine microsculpture consisting of transverse waves and strongly transverse meshes, with fine punctation, distance between punctures equals 3­6 times their diameter. Tergum 7 with microsculpture consisting of transverse meshes and with fine and sparse punctation, distance between punctures equal to 4­7 times their diameter. Apical margin of tergum 7 with white palisade fringe. Tergum 8 with four pairs of macrosetae ( Fig. 126 ).

In the only known male specimen pronotum with wide medial impression, posterior margin of male tergum 3 with two short and obtuse projections (as in Fig. 19 ), tergum 7 with medial tubercle in front of posterior margin. Posterior margin of male tergum 8 without emargination ( Fig. 126 ). Aedeagus as in Figs. 129­134 . Proximal seta of the apex of paramere is much longer than the other three setae ( Fig. 134 ).

Female unknown.

Distribution. Known from Guatemala ( Fig. 387 ).

Natural History. The only known specimen of S. grandis was collected with a flight intercept trap at altitude of 2620 m.

Figures

FIGURE 387. Geographical distribution of Seeversiella from Mexico to Honduras.

FIGURES 126 ­ 134. Abdominal segment 8 and aedeagus of Seeversiella grandis Gusarov, sp. n. (holotype). 126 – male tergum 8; 127 – male sternum 8; 128 – median lobe, parameral view; 129 – apex of median lobe, parameral view; 130 – median lobe, lateral view; 131 – apex of median lobe, lateral view; 132 – details of internal sac retracted into median lobe, abparameral view; 133 – details of internal sac retracted into median lobe, lateral view; 134 – apex of left paramere. Scale bar 0.4 mm (126 ­ 127), 0.3 mm (128, 130, 132 ­ 133), 0.1 mm (129, 131, 134).

FIGURES 17 ­ 19. Body outline of Seeversiella globicollis (Bernhauer) (17, Volcán Tacana, Mexico), S. micralymma Gusarov, sp. n. (18, paratype from Cerro de la Muerte, Costa Rica) and S. flavida Gusarov, sp. n. (19, paratype from Cerro de la Muerte, Costa Rica). Scale bar 1 mm.