Seeversiella

Gusarov, Vladimir I., 2003, A revision of the genus Seeversiella Ashe, 1986 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 142, pp. 1-102 : 10-11

Key for identification of species of Seeversiella

1 Elytra longer or only a little shorter than pronotum. Pronotal length to elytral length (measured from humeral angle) ratio 1.1 or less ......................................................... 2

– Elytra much shorter than pronotum ( Figs. 18­19 ). Pronotal length to elytral length (measured from humeral angle) ratio more than 1.1 ................................................. 28

2 Pronotum glossy, with weak isodiametric microsculpture or without microsculpture 3

– Pronotum matte, with strong isodiametric microsculpture ....................................... 25

3 Punctation of pronotum asperate. Tergum 8 with three pairs of macrosetae ( Figs. 222, 224 ). Proximal seta of the apex of paramere is approximately as long as the other three setae ( Fig. 233 ). Aedeagus: Figs. 226­233 . Spermatheca: Fig. 234 . Body length 2.6­3.0 mm, pronotal width 0.53­0.56 mm. Known from Cerro Punta, Panama, at altitude of 2100 m ( Fig. 388 ) .............................. 16. S. brevipennis Gusarov , sp. n.

– Punctation of pronotum not asperate. Tergum 8 with four pairs of macrosetae ( Figs. 20, 22 ). Proximal seta of the apex of paramere is much longer than the other three setae ( Fig. 33 )............................................................................................................... 4

4 Pronotum with weak isodiametric microsculpture ...................................................... 5

– Pronotum without microsculpture ............................................................................. 23

5 Males ............................................................................................................................ 6

– Females (Females of S. nigriceps are unknown) ........................................................ 15

6 Distal sclerites of internal sac strongly sclerotized, hook­shaped ( Figs. 31, 35 ; 48, 51; DS) or dentiform ( Figs. 63, 65 ; DS) 7

– Distal sclerites of internal sac poorly sclerotized, not hook­shaped or dentiform and may have numerous spicules ( Figs. 87 ; 99, 101; 124; 146; DS) ............................... 10

7 Distal sclerites of internal sac hook­shaped ( Figs. 31, 35 ; 48, 51) ............................. 8

– Distal sclerites of internal sac dentiform ( Figs. 63, 65 ; 124) ...................................... 9

8 Body dark brown. Microsculpture on head and pronotum less distinct. Apex of median lobe in lateral view straight ( Figs. 26­27 ). Copulatory piece of internal sac long ( Figs. 29, 34 ). Elytra (measured from humeral angle) longer than pronotum. Wings fully developed, 4 times as long as elytra. Aedeagus: Figs. 24­31, 33­36 . Body length 2.4­3.3 mm, pronotal width 0.44­0.54 mm. Widespread in North America, known from Canada to Honduras ( Figs. 385­387 ) .................................................. ...............................................................................1. S. globicollis (Bernhauer) (males)

– Body brown. Microsculpture on head and pronotum more distinct. Apex of median lobe in lateral view bent paramerally ( Figs. 43­44 ). Copulatory piece of internal sac short ( Figs. 46, 49­50 ). Elytra (measured from humeral angle) shorter than pronotum. Wings short, 2 times as long as elytra. Aedeagus: Figs. 41­52 . Body length 2.5­2.8 mm, pronotal width 0.44­0.49 mm. Known from the Guadalupe Mountains, Texas, at altitude of 2400 m ( Fig. 386 ) ............................... 2. S. texana Gusarov , sp. n. (males)

9 Distal sclerites of internal sac wider ( Figs. 63, 65 ). Aedeagus: Figs. 58­61, 63­67 . Body length 2.3­2.8 mm, pronotal width 0.40­0.44 mm. Known from the Huachuca

Mountains, Arizona, at altitude of 2150 m ( Fig. 386 ) ................................................... ........................................................ 3. S. sonomotoides Gusarov , sp. n. (males, in part) – Distal sclerites of internal sac narrower ( Fig. 124 ). Aedeagus: Figs. 119­125 . Body length 2.4 mm, pronotal width 0.47 mm. Known from Mexico, at altitude of 2400 m ( Fig. 387 )...............................................8. S. nigriceps Gusarov , sp. n. (males, in part)

10 Apex of median lobe in lateral view widened subapically ( Figs. 112­113 ; 156­157) 11

– Apex of median lobe in lateral view not widened subapically ( Figs. 85­86 ) ............. 14

11 Apex of median lobe in lateral view emarginate on parameral side ( Figs. 156­157 ). Aedeagus: Figs. 154­159 . Body length 2.5 mm, pronotal width 0.50­0.53 mm. Known from El Salvador, at altitude of 2100 m ( Fig. 387 ) ........................................... ................................................................................11. S. badia Gusarov , sp. n. (males)

– Apex of median lobe in lateral view may be slightly bent paramerally ( Figs. 141­142 ) but never clearly emarginate ( Figs. 112­113 ; 141­142) ............................................ 12

12 Apex of median lobe in parameral view wide ( Figs. 110­111 ). Aedeagus: Figs. 110­ 115 . Body length 2.4 mm, pronotal width 0.49 mm. Known from Mexico, at altitude of 1300 m ( Fig. 387 ) ............................... 7. S. tuberculicauda Gusarov , sp. n. (males)

– Apex of median lobe in parameral view narrow ( Figs. 139­140 ; 165­166) .............. 13

13 Apex of median lobe in parameral view with weak basal constriction ( Figs. 139­140 ). Aedeagus: Figs. 139­148 . Body length 2.2­2.8 mm, pronotal width 0.41­0.53 mm. Known from Mexico, at altitudes of 1700­2300 m ( Fig. 387 ) ....................................... ........................................................................ 10. S. mexicana Gusarov , sp. n. (males)

– Apex of median lobe in parameral view gradually widened basally, not constricted ( Figs. 165­166 ). Aedeagus: Figs. 165­173 . Body length 2.3­2.8 mm, pronotal width 0.48­0.54 mm. Known from Honduras, at altitude of 2000­2100 m ( Fig. 387 ) ............ ............................................................................. 12. S. similis Gusarov , sp. n. (males)

14 Distal sclerites of internal sac have weak spicules ( Fig. 87 ). Aedeagus: Figs. 83­88 . Body length 2.3­2.5 mm, pronotal width 0.46­0.50 mm. Known from Mexico, at altitude of 1700­1900 m ( Fig. 387 ) ............................. 5. S. fusca Gusarov , sp. n. (males)

– Distal sclerites of internal sac have strong spicules ( Figs. 99, 101 ). Aedeagus: Figs. 94­103 . Body length 2.3­2.8 mm, pronotal width 0.46­0.50 mm. Known from Mexico and Honduras, at altitude of 1500­2400 m ( Fig. 387 ) ............................................................................................................................6. S. castanea Gusarov , sp. n. (males)

15 Spermatheca S­shaped ( Figs. 149 , 160 ) .................................................................... 16

– Spermatheca L­, J­ or C­shaped ( Figs. 32 , 53 , 62 , 89 , 104 ) ....................................... 18

16 Umbilicus facing proximally ( Fig. 149 ). Body length 2.2­2.8 mm, pronotal width 0.41­0.53 mm. Known from Mexico, at altitudes of 1700­2300 m ( Fig. 387 ) ............. ..................................................................... 10. S. mexicana Gusarov , sp. n. (females)

– Umbilicus facing laterally ( Figs. 160 , 174 ). Two closely related species which cannot be distinguished by females ....................................................................................... 17

17 Body length 2.5 mm, pronotal width 0.50­0.53 mm. Spermatheca: Fig. 160 . Known from El Salvador, at altitude of 2100 m ( Fig. 387 ) .....................................................................................................................................11. S. badia Gusarov , sp. n. (females)

Figures

FIGURE 385. Geographical distribution of Seeversiella globicollis (Bernhauer).

FIGURE 386. Geographical distribution of Seeversiella in America north of Mexico.

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

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 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.

FIGURES 222 ­ 225. Abdominal segment 8 of Seeversiella brevipennis Gusarov, sp. n. (222 ­ 223, holotype; 224 ­ 225, paratype, 5.9 km N Cerro Punta, Panama). 222 – male tergum 8; 223 – male sternum 8; 224 – female tergum 8; 225 – female sternum 8. Scale bar 0.2 mm.

FIGURES 230 ­ 234. Genitalia of Seeversiella brevipennis Gusarov, sp. n. (230 ­ 233, holotype; 234, paratype, 5.9 km N Cerro Punta, Panama). 230 ­ 231 – details of internal sac retracted into median lobe, lateral view; 232 – details of internal sac retracted into median lobe, abparameral view; 233 – apex of left paramere; 234 – spermatheca. Scale bar 0.2 mm (230 ­ 232), 0.1 mm (233 ­ 234).

FIGURES 226 ­ 229. Aedeagus of Seeversiella brevipennis Gusarov, sp. n. (holotype). 226 – median lobe, parameral view; 227 – apex of median lobe, parameral view; 228 – median lobe, lateral view; 229 – apex of median lobe, lateral view. Scale bar 0.2 mm (226, 228), 0.1 mm (227, 229).

FIGURES 20 ­ 23. Abdominal segment 8 of Seeversiella globicollis (Bernhauer) (20 ­ 21, Cloudcroft, New Mexico; 22 ­ 23, Salmo, British Columbia). 20 – male tergum 8; 21 – male sternum 8; 22 – female tergum 8; 23 – female sternum 8. Scale bar 0.4 mm.

FIGURES 28 ­ 36. Genitalia of Seeversiella globicollis (Bernhauer) (28, 34 ­ 35, Cypress Hills Provincial Park, Alberta; 29 ­ 31, 33, 36, Cloudcroft, New Mexico; 32, Salmo, British Columbia). 28 – details of internal sac retracted into median lobe, abparameral view; 29 – everted internal sac, parameral view; 30 – medial lamellae, parameral view; 31 – right hook of internal sac; 32 – spermatheca; 33 – apex of left paramere; 34 ­ 35 – details of internal sac retracted into median lobe, lateral view; 36 – copulatory piece. Scale bar 0.2 mm (28, 34 ­ 35), 0.1 mm (29 ­ 33, 36).

FIGURES 58 ­ 67. Genitalia of Seeversiella sonomotoides Gusarov, sp. n. (paratypes from Carr Canyon, Arizona). 58 – median lobe, parameral view; 59 – apex of median lobe, parameral view; 60 – median lobe, lateral view; 61 – apex of median lobe, lateral view; 62 – spermatheca; 63 – details of internal sac retracted into median lobe, lateral view; 64 – apex of left paramere; 65 – right hook of internal sac; 66 – copulatory piece, lateral view; 67 – everted internal sac, parameral view. Scale bar 0.2 mm (58, 60, 63, 67), 0.1 mm (59, 61 ­ 62, 64 ­ 66).

FIGURES 83 ­ 89. Genitalia of Seeversiella fusca Gusarov, sp. n. (paratypes, 71 km NE Atoyac de Alvarez, Mexico). 83 – median lobe, parameral view; 84 – apex of median lobe, parameral view; 85 – median lobe, lateral view; 86 – apex of median lobe, lateral view; 87 – details of internal sac retracted into median lobe, lateral view; 88 – apex of left paramere; 89 – spermatheca. Scale bar 0.2 mm (83, 85, 87), 0.1 mm (84, 86, 88 ­ 89).

FIGURES 24 ­ 27. Aedeagus of Seeversiella globicollis (Bernhauer) (Cypress Hills Provincial Park, Alberta). 24 – median lobe, parameral view; 25 – apex of median lobe, parameral view; 26 – median lobe, lateral view; 27 – apex of median lobe, lateral view. Scale bar 0.2 mm (24, 26), 0.1 mm (25, 27).

FIGURES 41 ­ 44. Aedeagus of Seeversiella texana Gusarov, sp. n. (paratypes from Guadalupe Mountains National Park, Texas). 41 – median lobe, parameral view; 42 – apex of median lobe, parameral view; 43 – median lobe, lateral view; 44 – apex of median lobe, lateral view. Scale bar 0.2 mm (41, 43), 0.1 mm (42, 44).

FIGURES 45 ­ 53. Genitalia of Seeversiella texana Gusarov, sp. n. (paratypes from Guadalupe Mountains National Park, Texas). 45 – details of internal sac retracted into median lobe, abparameral view; 46 – copulatory piece, parameral view; 47 – medial lamellae, parameral view; 48 ­ 49 – details of internal sac retracted into median lobe, lateral view; 50 – copulatory piece, lateral view; 51 – right hook of internal sac; 52 – apex of left paramere; 53 – spermatheca. Scale bar 0.2 mm (45, 48 ­ 49, 53), 0.1 mm (46 ­ 47, 50 ­ 52).

FIGURES 117 ­ 125. Abdominal segment 8 and aedeagus of Seeversiella nigriceps Gusarov, sp. n. (holotype). 117 – male tergum 8; 118 – male sternum 8; 119 – median lobe, parameral view; 120 – apex of median lobe, parameral view; 121 – median lobe, lateral view; 122 – apex of median lobe, lateral view; 123 ­ 124 – details of internal sac retracted into median lobe, lateral view; 125 – apex of left paramere. Scale bar 0.3 mm (117 ­ 118), 0.2 mm (119, 121, 123 ­ 124), 0.1 mm (120, 122, 125). DS – distal sclerite of internal sac.

FIGURES 109 ­ 116. Genitalia of Seeversiella tuberculicauda Gusarov, sp. n. (109 ­ 115, holotype; 116, paratype from Jalapa, Mexico). 109 – apex of left paramere; 110 – median lobe, parameral view; 111 – apex of median lobe, parameral view; 112 – median lobe, lateral view; 113 – apex of median lobe, lateral view; 114 ­ 115 – details of internal sac retracted into median lobe, lateral view; 116 – spermatheca. Scale bar 0.1 mm (109, 111, 113, 116), 0.2 mm (110, 112, 114 ­ 115).

FIGURES 154 ­ 160. Genitalia of Seeversiella badia Gusarov, sp. n. (154 ­ 159, holotype; 160, paratype, 21.7 km NE Metapan, El Salvador). 154 – median lobe, parameral view; 155 – apex of median lobe, parameral view; 156 – median lobe, lateral view; 157 – apex of median lobe, lateral view; 158 – details of internal sac retracted into median lobe, lateral view; 159 – apex of left paramere; 160 – spermatheca. Scale bar 0.2 mm (154, 156, 158), 0.1 mm (155, 157, 159 ­ 160).

FIGURES 139 ­ 142. Aedeagus Seeversiella mexicana Gusarov, sp. n. (paratypes from Filo de Caballo, Mexico). 139 – median lobe, parameral view; 140 – apex of median lobe, parameral view; 141 – median lobe, lateral view; 142 – apex of median lobe, lateral view. Scale bar 0.2 mm (139, 141), 0.1 mm (140, 142).

FIGURES 165 ­ 168. Aedeagus of Seeversiella similis Gusarov, sp. n. (holotype). 165 – median lobe, parameral view; 166 – apex of median lobe, parameral view; 167 – median lobe, lateral view; 168 – apex of median lobe, lateral view. Scale bar 0.2 mm (165, 167), 0.1 mm (166, 168).

FIGURES 94 ­ 104. Genitalia of Seeversiella castanea Gusarov, sp. n. (paratypes from Rayon (94 ­ 97, 99 ­ 102) and Las Piedrecitas (98, 103 ­ 104), Mexico). 94 – median lobe, parameral view; 95 – apex of median lobe, parameral view; 96 – median lobe, lateral view; 97 – apex of median lobe, lateral view; 98 – everted internal sac, parameral view; 99 – right hook of internal sac; 100 ­ 101 – details of internal sac retracted into median lobe, lateral view; 102 – apex of left paramere; 103 – copulatory piece, lateral view; 104 – spermatheca. Scale bar 0.2 mm (94, 96, 98, 100 ­ 101), 0.1 mm (95, 97, 99, 102 ­ 104).

FIGURES 143 ­ 149. Genitalia of Seeversiella mexicana Gusarov, sp. n. (paratypes from Filo de Caballo (143, 145 ­ 148) Suchixtepec (144, 149), Mexico). 143 – everted internal sac, parameral view; 144 – medial lamellae, parameral view; 145 ­ 146 – details of internal sac retracted into median lobe, lateral view; 147 – copulatory piece, lateral view; 148 – apex of left paramere; 149 – spermatheca. Scale bar 0.2 mm (143, 145 ­ 146), 0.1 mm (144, 147 ­ 149).

FIGURES 169 ­ 174. Genitalia of Seeversiella similis Gusarov, sp. n. (171, 173, holotype; 169 ­ 170, 172, 174, paratypes from La Tigra, Honduras). 169 – everted internal sac, parameral view; 170 – medial lamellae, parameral view; 171 – apex of left paramere; 172 – everted internal sac, lateral view; 173 – details of internal sac retracted into median lobe, lateral view; 174 – spermatheca. Scale bar 0.2 mm (169, 172 ­ 173), 0.1 mm (170 ­ 171, 174).