Seeversiella scabricollis Gusarov

Gusarov, Vladimir I., 2003, A revision of the genus Seeversiella Ashe, 1986 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 142, pp. 1-102 : 50-55

14. Seeversiella scabricollis Gusarov , sp. n. ( Figs. 11, 15 , 190­207 )

Type material. Holotype ,, COSTA RICA: Cartago: Sendero a Cerro Chirripó, 9°26'47"N 83°32'12"W, 2800 m, mixed oak forest litter (R.Anderson), 27.vi.1999 ( KSEM).

Paratypes: COSTA RICA: Cartago: 42 specimens, same data as the holotype; 50 specimens, ditto but 9°26'37"N 83°32'14", 2950 m, oak forest litter;, Cerro Chirripó, Base Crestones, 9°27'17"N 83°30'16"W, 3350 m, elfin forest litter (R.Anderson), 25.vi.1999; 17 specimens, 2 km S Villa Mills, 3000 m, ridgetop oak forest litter (R.S.Anderson), 10.ii.1996;, 2.0 km E Villa Mills, 9°34'00"N 83°41'50"W, 2750 m, oak forest litter (R.S.Anderson), 15.ii.1998;, Cerro Buenavista, 9°43'02"N 83°45'14"W, 3300 m, subparamo litter (R.Anderson); 10 specimens, Cerro de la Muerte, 4 km NE Cañon, 2350 m, malaise trap (P.Hanson), i.1995; 2 specimens, ditto but 1.i­30.iii.1995; 3 specimens, ditto but 1­30.iv.1995; 1 specimen, ditto but 1­30.v.1995; 2 specimens, ditto but 1­30.vi.1995; 6 specimens, ditto but 1­30.vii.1995; 2 specimens, ditto but 1­ 30.viii.1995; 1 specimen, ditto but 1­30.i.1996; 1 specimen, ditto but 1.iv­30.v.1996; 7 specimens, ditto but 1­30.vii.1996; 3 specimens, ditto but 1­30.ix.1996; 4 specimens, 2 km N P. N. Volcán Irazú, 10°00'00"N 83°51'00"W, 2900 m, berlese forest litter (R.Anderson), 18.vi.1997; 6 specimens, 3 km N P. N. Volcán Irazú, 9°59'45"N 83°51'00"W, 2750 m, berlese forest litter (R.Anderson), 18.vi.1997;, Madreselva, Finca Los Lagos, A. C. Amistad, 2000­2600 m, 12­19.vi.1993; 2, ditto but 28.vi­10.vii.1993;, ditto but ix.1993;, ditto but x.1993; San Jose / Cartago: 11 specimens, km 71, Int. Amer. Hwy., nr. Tres de Junio, 9°37'44"N 83°50'13"W, 2900 m, wet cloud forest litter (R.Anderson), 23.vi.1999; 3, km 69, Int. Amer. Hwy., nr. Tres de Junio, 9°39'30"N 83°51'30"W, 2600 m, flight intercept trap (S. & J.Peck), 7­19.vi.1997; 11 specimens, km 78, Int. Amer. Hwy., nr. Ojo de Agua, 9°36'30"N 83°50'20"W, 2800 m, cloud forest litter (R.Anderson), 8.vii.1999; 9 specimens, km 72, Int. Amer. Hwy., 3 km W Ojo de Agua, 9°37'30"N 83°50'30"W, 2950 m, berlese forest litter (R.Anderson), 7.vi.1997;, km 87, Int. Amer. Hwy., nr. Cerro Buenavista, 9°36'30"N 83°46'00"W, 3150 m, berlese forest litter (R.Anderson), 8.vi.1997; 8 specimens, Cerro Buenavista, km 89, Int. Amer. Hwy., 9°33'00"N 83°45'30"W, 3200 m, berlese leaf litter (R.Anderson), 18.vi.1998;, 2, km 55, Int. Amer. Hwy., 3 km S El Empalme, 9°42'30"N 83°57'00"W, 2350 m, berlese forest litter (R.Anderson), 8.vi.1997; San Jose: 15 specimens, Estación Cuerici, 4.6 km E Villa Mills, 9°34'00"N 83°40'00"W, 2600 m, berlese forest litter (R.Anderson), 26.vi.1997; 3 specimens, ditto but 19.vi.1997;

, 2.0 km E Villa Mills, 9°33'30"N 83°42'00"W, 2800 m, berlese forest litter (R.Anderson), 26.vi.1997;, 2, km 97, Int. Amer. Hwy., Villa Mills, 3000 m, flight intercept traps (S. & J.Peck), 26.vi.1997; 3,, Cerros de Escazú, 2 km S San Antonio, 9°53'30"N 84°09'00"W, 1650 m, berlese forest litter (R.Anderson), 13.vi.1997; 8 specimens, Cerro de la Muerte, 6 km N San Gerardo, 2800 m (P.Hanson), viii­ix.1992; 4 specimens, ditto but x­xii.1992; 2 specimens, ditto but iv.1992; 2, malaise trap, ditto but iv.1993;, Cerro de la Muerte, 19 km S and 3 km W of Empalme, 2600 m, malaise trap (P.Hanson), ix­x.1992; 7, 26 km N San Isidro, 2100 m (P.Hanson), xi.1992 ­ i.1993;, ditto but vi­vii.1990;, ditto but ix­x.1992; 2 specimens, 2 km W Empalme, Cerro de la Muerte, 2300 m (P.Hanson), 1­30.vii.1995, malaise trap; Heredia: 2, 2, 3 specimens, Porrosati, 6 km N San José de la Montana, 10°05'30"N 84°07'00"W, 1900 m, berlese forest litter (R.Anderson); 44 specimens, P. N. Braulio Carrillo Volcán Barva, 10°07'30"N 84°07'30"W, 2600 m, berlese forest litter (R.Anderson), 11.vi.1997; 21 specimens, ditto but, flight intercept trap (S. & J.Peck), 11­27.vi.1997; 4 specimens, Vara Blanca, Finca Georgina, 2100 m (P.Hanson), vi­vii.1990; Alajuela: 28 specimens, P. N. Volcán Poás, 10°11'30"N 84°14'00"W, 2500 m, berlese forest litter (R.Anderson), 6.vi.1997;,, ditto but flight intercept trap (S. & J.Peck), 6­28.vi.1997; PANAMA: Chiriquí: 31 specimens, 5.9 km NE Cerro Punta, Par. Nac. Volcán Barú, 8°52'N [the latitude on the label (8°22'0"N) is incorrect] 82°34'W, 2100 m, flight intercept traps (J.S.Ashe & R.Brooks), 14­16.vi.1995;, ditto but 2400 m, bamboo forest litter (R.S.Anderson), 14.vi.1995; 12 specimens, ditto but 2150 m, alder forest litter (R.S.Anderson), 14.vi.1995;

, 27.7 km W Volcán Hartmann's Finca, 1450 m, 8°51'48"N 82°44'36"W, 1450 m, forest litter (R.S.Anderson), 14.vi.1995; 22 specimens, NNE of Las Nubes @ continental divide, 2490 m (A.R.Gillogly), 14­15.vi.1995; 5 specimens, N of Las Nubes, 2350­2450 m, continental divide (A.R.Gillogly), 15.vi.1995; 2, Cerro Pando, 1875 m, 8°54'42"N 82°43'18"W, 1875 m, flight intercept trap (J.S.Ashe, R.Brooks), 17­18.vi.1996;, ditto but 1850 m; 6 specimens, 11 km NW Boquete, Volcán Barú, 2150 m, 8°48'00"N 82°29'00"W, 2150 m, oak forest litter (R.S.Anderson), 18.vi.1995 (all ­ KSEM).

Diagnosis. Seeversiella scabricollis can be distinguished from other species of Seeversiella by having dark brown body with brown elytra, legs and mouthparts; large eyes (temple length to eye length ratio 0.9­1.1); matte pronotum with strong microsculpture; elytra longer than pronotum; wings fully developed or reduced; tergum 8 with three pairs of macrosetae; the distinct shape of aedeagus ( Figs. 194­204, 206­207 ) and the shape of spermatheca ( Fig. 205 ).

Seeversiella scabricollis differs from S. furcativentris in having parallel­sided apex of median lobe (in parameral view) ( Figs. 194­196 ; 212­213).

Seeversiella scabricollis differs from S. brunnea in having straight apex of median lobe (in lateral view) ( Figs. 197­198 ; 241­242).

Seeversiella scabricollis differs from S. brevipennis in having matte pronotum; pronotal punctation not asperate; elytra longer than pronotum; apex of median lobe parallelsided (in parameral view) ( Figs. 194­196 ; 226­227).

Seeversiella scabricollis differs from S. curtipennis in having larger eyes; longer elytra; wings longer than elytra; posterior margin of male tergum 8 with medial emargination ( Fig. 190 ); narrow apex of the median lobe (in parameral view) ( Figs. 194­196 ; 251­ 252); short medial lamellae of the internal sac ( Figs. 201 ; 258); lateral diverticula with sclerotized denticles ( Figs. 200, 207 ; 259); and shorter spermatheca ( Figs. 205 , 255 ).

CP – copulatory piece; LD – lateral diverticulum of internal sac.

Description. Length 2.7­3.1 mm. Body dark brown, with brown elytra, legs and mouthparts.

Head surface matte, with fine isodiametric microsculpture, fine and slightly asperate punctation, distance between punctures equals 2 times their diameter. Temple length to eye length ratio 0.9­1.1. Antennal article 2 longer than article 3, article 4 subquadrate, 5 slightly transverse, 6­10 transverse (ratio 1.5­2.0).

Pronotum slightly transverse, 1.2 times as wide as head, width 0.49­0.54 mm, length 0.41­0.46 mm, width to length ratio 1.2, surface matte, with fine isodiametric microsculpture; punctation fine and weak, distance between punctures equal to their diameter. Elytra wider and longer (measured from humeral angle) than pronotum (pronotal length to elytral length ratio 0.8), 1.3 times as wide as long, glossy, with fine and weak isodiametric microsculpture; with fine punctation, distance between punctures equal to ½­1 time their diameter. Wings fully developed or partially reduced, longer than elytra.

Abdominal terga glossy, with fine microsculpture consisting of strongly transverse meshes, with fine punctation, distance between punctures equals 2­4 times their diameter on terga 3­5 and 4­7 times on tergum 7. Apical margin of tergum 7 with white palisade fringe. Tergum 8 with three pairs of macrosetae ( Figs. 190, 192 ).

In males posterior angles of tergum 3 projecting as spines up to 3 times as long as tergum 3 (measured medially); tergum 7 with medial carina along midline, the carina up to 2/ 3 as long as tergum length; posterior margin of tergum 8 with medial emargination delimited by short dentiform projections ( Fig. 190 ).

Aedeagus as in Figs. 194­204, 206­207 . Apex of paramere broad, proximal seta approximately as long as the other three setae ( Fig. 202 ).

Spermatheca as in Fig. 205 .

Distribution. Known from Costa Rica and Panama ( Fig. 388 ).

Natural History. Seeversiella scabricollis was collected in leaf litter and with flight intercept and malaise traps, at altitudes of 1450­3300 m.

Figures

FIGURE 388. Geographical distribution of Scabricollis group in Costa Rica and Panama. 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 10 ­ 16. Details of Seeversiella globicollis (Bernhauer) (10, Anticosti, Quebec; 13, Waterton Lakes National Park, Alberta), S. scabricollis Gusarov, sp. n. (11, 15, paratype from Volcán Barva, Costa Rica) and S. micralymma Gusarov, sp. n. (12, 14, 16, paratype from Cerro Buenavista, Costa Rica). 10 ­ 12 – pronotum; 13 ­ 14 – mesometathorax; 15 – male tergum 3 and paratergites; 16 – male tergum 3. Scale bar 0.4 mm (10 ­ 11, 15), 0.3 mm (12 ­ 13, 16), 0.2 mm (14).

FIGURES 190 ­ 193. Abdominal segment 8 of Seeversiella scabricollis Gusarov, sp. n. (190 ­ 191, holotype; 192 ­ 193, paratype, Sendero a Cerro Chirripó, Costa Rica). 190 – male tergum 8; 191 – male sternum 8; 192 – female tergum 8; 193 – female sternum 8. Scale bar 0.4 mm.

FIGURES 194 ­ 198. Aedeagus of Seeversiella scabricollis Gusarov, sp. n. (194, 196 ­ 198, holotype; 195, paratype, San José de la Montana, Costa Rica). 194 ­ 195 – median lobe, parameral view; 196 – apex of median lobe, parameral view; 197 – median lobe, lateral view; 198 – apex of median lobe, lateral view. Scale bar 0.2 mm (194 ­ 195, 197), 0.1 mm (196, 198).

FIGURES 199 ­ 207. Genitalia of Seeversiella scabricollis Gusarov, sp. n. (199, 204, holotype; 200 ­ 203, 205 ­ 207, paratypes, sendero a Cerro Chirripó, Costa Rica). 199 – details of internal sac retracted into median lobe, abparameral view; 200 – everted internal sac, parameral view; 201 – medial lamellae, parameral view; 202 – apex of left paramere; 203 – everted internal sac, lateral view; 204 – details of internal sac retracted into median lobe, lateral view; 205 – spermatheca; 206 – right distal sclerite of internal sac; 207 – left lateral diverticulum of internal sac, with denticulate sclerotized portion. Scale bar 0.2 mm (199 ­ 200, 203 ­ 204), 0.1 mm (201 ­ 202, 205 ­ 207).

FIGURES 251 ­ 255. Genitalia of Seeversiella curtipennis Gusarov, sp. n. (paratypes, Volcán Irazú, Costa Rica). 251 – median lobe, parameral view; 252 – apex of median lobe, parameral view; 253 – median lobe, lateral view; 254 – apex of median lobe, lateral view; 255 ­ spermatheca. Scale bar 0.2 mm (251, 253), 0.1 mm (252, 254 ­ 255).