Boreantrops punctipennis, Kits, Joel H. & Marshall, Stephen A., 2015

Kits, Joel H. & Marshall, Stephen A., 2015, A revision of Boreantrops Kits & Marshall (Diptera: Sphaeroceridae: Archiborborinae), Zootaxa 3915 (3), pp. 301-355 : 342-343

Boreantrops punctipennis sp. nov.

(Figs. 20, 92, 127)

Diagnosis. Separable from other members of the emarginatus group by the following characters: Occiput black, prementum yellow. Anterior margin of anepisternum shiny below spiracle. Mid tibia without row of anterodorsal bristles. Hind tibia with one ventroapical bristle. Wing with white spot on vein R4+5 basal to r-m crossvein and at vein tips. Male postgonite with a triangular projection on posterior margin.

Description. Occiput black, frontal triangle and orbital plates reddish brown to dark brown, interfrontal plates orange to reddish brown, face, gena, and antenna orange. Maxillary palp and prementum yellow. Occiput and gena covered with microtomentum, frons mostly shiny with microtomentum on orbital plate in a line medial to inner vertical and around bases of orbital bristles, face with microtomentum below lunule and in dense crescent below antenna. Ocellar bristles just anterior to median ocellus. Subvibrissal and anterior genal bristle about 0.5X length of vibrissa.

Thorax black, mostly covered with microtomentum. Proepisternum shiny, anepisternum mostly shiny with microtomentum covering dorsal quarter and posterior third, katepisternum with a shiny spot behind fore coxa, meron and metapleuron shiny with band of microtomentum between posterior spiracle and hind coxa. Halter white, brownish below knob.

Legs black, trochanters and joints dark reddish brown, fore tarsus brown, mid and hind tarsi with 2 basal tarsomeres yellow, 3 distal tarsomeres brown. Mid tibia with 1 anteroventral, 6 subapical bristles. Hind tibia with 1 long thin anteroventral, 1 ventroapical bristle.

Wing brown, veins dark brown. White spots on crossvein r-m, bm-cu, and dm-cu, veins R2+3 and M with spots at apex, vein R4+5 with 1 spot basal to crossvein r-m, 2 distal to crossvein r-m, and 1 at apex. Vein R2+3 slightly recurved (Fig. 20).

Abdomen with tergites and sternites weakly sclerotized. Syntergite 1+2 with posterolateral corners and a thin band between them strongly sclerotized, tergites 3–4 with a thin posterior band moderately sclerotized.

Male postabdomen: Sternite 5 with lateral margins strongly rounded, posterior margin broadly but shallowly notched, anterior apodeme slightly longer than external portion, without keel. Epandrium extending medially above cerci but not fused in middle, anal opening keyhole shaped. Surstylus with anterior thumb-like projection, ventral portion narrow, posterior margin with peg-like setae ventrally. Pregonite not fused with postgonite, fairly large. Postgonite very narrow, posterior margin with a triangular tooth-like projection, lobes not separated, posterior lobe longer. Basiphallus narrow, with long epiphallus, preepiphallus broad with sides parallel medially. Distiphallus with a long dorsal tube with spines near base, flanked by two spike-like sclerites, distal sclerite not projecting dorsally ( Fig. 92 ).

Female postabdomen: Tergites 6–7 and sternites 6–7 much wider than long, tergite 6 not sclerotized or with irregular sclerotization along margins, tergite 7 sclerotized along anterior and lateral margins only, sternite 6 with some irregular sclerotization along anterior margin, sternite 7 sclerotized around margins, medial unsclerotized patch round. Tergite 8 broad, heavily sclerotized, lateral margins rounded, anterior margin with a narrow notch, shallowly emarginated posteriorly, posterior two-thirds covered with microtomentum. Epiproct with fairly long anterior arms, 1 pair of setae, microtomentum medially. Cerci long, narrow. Sclerites of sternite 8 with anterior half shiny and sculptured, posterior half slightly wider, covered with microtomentum. Hypoproct rounded, moderately sclerotized except small, central weakly sclerotized spot. Spermathecae sausage-shaped, about 5X longer than wide, with shallow apical invagination, sclerotized duct about two-thirds as long as bulb.

Type material. Holotype ♂: BOLIVIA: La Paz: Coroico, Cerro Uchumachi, 16°12'43"S 67°42'49"W, 2550 m, cloud forest, 5 Apr 2001, S.A. Marshall, debu00189504 ( UASC). Paratypes: same data as holotype (5 ♂, 5 ♀, DEBU, UASC); as above but elfin forest, dung pans, 5–6 Apr 2001 (6 ♂, 7 ♀, DEBU, UASC); Apa Apa, 8 km S Chulumani, 1950–2100 m, 24 Mar 2001, S.D. Gaimari (1 ♂, USNM); Caranavi, ca. 10 km NW, road to ENTEL tower, 1400 m, dung baits, 13 Apr 2001, S.A. Marshall (1 ♂, DEBU); as above but dung pans (6 ♂, 5 ♀, DEBU, UASC); as above but 1700 m, bamboo (3 ♂, 1 ♀, DEBU); Chulumani, Apa Apa Reserve, 2000 m, 1 Apr 2001, S.A. Marshall (2 ♂, DEBU); as above but dung baits (3 ♂, 2 ♀, DEBU); as above but pan traps, 1–3 Apr 2001 (3 ♀, DEBU); as above but sweeping, 1 Apr 2001 (1 ♂, DEBU); Coroico, 0.5 km SE, 15 Apr 2001, S.A. Marshall (1 ♂, DEBU); Zongo, roadside, sweeping cut foliage, 18 Apr 2001, S.A. Marshall (1 ♂, DEBU).

Distribution. Western Bolivia (Fig. 127). Elevations from 1400–2550 m.

Etymology. The species name refers to the boldly spotted wings, which distinguish this species (as well as B. pollex ) from other Boreantrops.

Figures

FIGURES 86 – 92. Boreantrops male terminalia. B. machinator: 86) phallus, postgonite, and phallapodeme, lateral view, 87) sternite 5, 88) right surstylus, interior view; B. pollex: 89) phallus, postgonite, and phallapodeme, lateral view, 90) sternite 5, 91) right surstylus, interior view; B. punctipennis: 92) phallus, postgonite, and phallapodeme, lateral view. sls: spike – like sclerites.