Baryopsis, FAIRMAIRE & GERMAIN, 1861

Assing, V., 2012, On the Baryopsis species of Peru (Coleoptera: Staphylinidae: Paederinae: Cryptobiina), Linzer biologische Beiträge 44 (1), pp. 335-346 : 344-345

Key to the Baryopsis species of Peru

1 Macropterous species of large body size (approximately 17 mm). Elytra with violet hue..................................................................................................... B. calcarata (SOLSKY)

- Micropterous species; elytra very short, approximately half the length of pronotum ( Figs 1 , 8 , 15 , 22 ). Elytra dark-brown to blackish, without violet hue................................2

2 Smaller species; body length 8.0- 8.5 mm. Pronotum with distinct microsculpture composed of longitudinal meshes ( Figs 17-18 ); dorsal series composed of 6-10 punctures. Pronotum and elytra without noticeable micropunctation ( Figs 17-18 ). Pronotum approximately 1.15 times as long as broad, with distinctly convex lateral margins in dorsal view, and distinctly broader than head ( Fig. 15 ). 3: aedeagus smaller, approximately 0.9 mm long, shaped as in Figs 20-21 . Southern Peruvian Andes (Cusco)............................................................................................ B. minor nov.sp .

- Larger species; body length at least 10 mm. Microsculpture of pronotum, if present, composed of isodiametric meshes. Pronotum and elytra with micropunctation. Pronotum mostly more oblong, parallel-sided, and at least as broad as head. 3: aedeagus distintly larger and of different shape..................................................................3

3 Conspicuously large species, body length 14-18 mm. Pronotum widest near anterior margin, posteriorly gradually tapering ( Fig. 8 ); lateral margins straight in anterior 3/4, weakly sinuate near posterior angles; microsculpture of head and pronotum distinct and distinctly isodiametric ( Figs 9-11 ). Abdomen with coarse and dense punctation; posterior margin of tergite VIII obtusely angled in the middle. 3: sternite VIII with relatively shallow posterior excision ( Fig. 12 ); aedeagus 2.1 mm long and with slender ventral process ( Figs 13-14 ); paramares not reaching apex of ventral process. Southern Peruvian Andes (Cusco)............................................................................ B. ingens nov.sp .

- Pronotum at most with very shallow microreticulation, either parallel-sided or with maximal width at some distance from anterior margin, lateral margins not sinuate posteriorly. Abdomen with relatively fine punctation; tergite VIII with convex posterior margin. 3: posterior excision of sternite VIII deeper and narrower; aedeagus with less slender and apically hooked ventral process. Northern Peruvian Andes..............4

4 Smaller species; body length 10.0- 13.5 mm. Head with shallower (at least posteriorly) ( Fig. 2 ), pronotum at a magnification of 50 x without microsculpture and conspicuously glossy ( Fig. 3 ). Pronotum more slender, approximately 1.25 times as long as broad, and not parallel-sided, widest in anterior half and distinctly tapering posteriorly ( Fig. 1 ). Elytra without distinct microreticulation and glossy, distinctly dilated posteriad ( Fig. 1 ). 3: posterior excision of sternite VIII deeper ( Fig. 4 ); aedeagus approximately 1.7 mm long, shaped as in Figs 5-7 ; ventral process apically dilated (ventral view). Ancash .................................................................. B. glabra nov.sp.

- Larger species; body length at least 14 mm. Head with pronounced ( Fig. 23 ), pronotum with shallow microreticulation ( Fig. 24 ). Pronotum less slender, approximately 1.15 times as long as broad, and parallel-sided ( Fig. 22 ). Elytra with pronounced microreticulation ( Fig. 25 ), almost matt, and weakly dilated posteriad. 3: posterior excision of sternite VIII less deep ( Fig. 26 ) ; aedeagus much larger, approximately 2.3 mm long; ventral process apically not dilated (ventral view) and shaped differently (lateral view) ( Figs 27-30 ). Environs of Cerro de Pasco ........... B. montivagans (BERNHAUER)

Figures

Figs 1-7: Baryopsis glabra nov.sp.: (1) habitus; (2) median portion of head; (3) median portion of pronotum; (4) male sternite VIII; (5-6) aedeagus in lateral view; (7) aedeagus in ventral view. Scale bars: 1, 4-7: 1.0 mm; 2-3: 0.5 mm.

Figs 8-14: Baryopsis ingens nov.sp., holotype: (8) forebody; (9) median portion of head; (10-11) median portion of pronotum; (12) male sternite VIII; (13-14) aedeagus in lateral and in ventral view. Scale bars: 8, 12-14: 1.0 mm; 9-10: 0.5 mm; 11: 0.1 mm.

Figs 15-21: Baryopsis minor nov.sp., holotype: (15) habitus; (16) median portion of head; (17-18) median portion of pronotum; (19) male sternite VIII; (20-21) aedeagus with internal sac extruded in lateral and in ventral view. Scale bars: 15: 1.0 mm; 19-21: 0.5 mm; 16-18: 0.2 mm.

Figs 22-30: Baryopsis montivagans (BERNHAUER), lectotype: (22) forebody; (23) median portion of head; (24) median portion of pronotum; (25) sutural portion of elytra; (26) male sternite VIII; (27-28) aedeagus in lateral and in ventral view; (29) apical portion of ventral process in lateral view; (30) apical portion of ventral process in ventral view. Scale bars: 22-28: 1.0 mm; 29-30: 0.5 mm.