Boreantrops talamanca, 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 : 345-346

Boreantrops talamanca sp. nov.

( Figs. 96, 97 , 129)

Diagnosis. Separable from other members of the emarginatus group by the following characters: Occiput black, prementum orange. Anterior margin of anepisternum with microtomentum below spiracle. Mid tibia with row of anterodorsal bristles. Hind tibia with anteroventral bristle just past half, with one ventroapical bristle. Wing without white spots. Male sternite 5 with deep U-shaped notch in posterior margin.

Description. Head brown to dark brown, occiput black, prementum brown to dark brown, ventral corners of face may be darker than rest of face, antenna orange. Mostly covered with microtomentum, frons with shiny spots lateral to ocelli, face mostly shiny with microtomentum below antenna and lunule. Ocellar bristles just anterior to median ocellus. Subvibrissal and anterior genal bristles about 0.3X length of vibrissa.

Thorax black, mostly covered with microtomentum. Proepisternum shiny, anepisternum with ventromedial shiny spot covering about three-quarters height and half length of sclerite, katepisternum with a shiny spot behind fore coxa, thin shiny stripe along margin of meron and metapleuron, metapleuron with a shiny spot in posteroventral corner. Halter white, brownish below knob.

Legs black, joints, trochanters, and tarsi yellow, distal 3 tarsomeres of fore tarsus brown. Fore basotarsomere with a small spur in male. Mid tibia with row of anterodorsals, 1 anteroventral, 1 posteroventral, 5 subapical bristles. Hind tibia with 1 ventroapical bristle.

Wing brown, veins dark brown, crossveins r-m and dm-cu paler.

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 long, lateral margins rounded, posterior corners projecting posteriorly, posterior margin with a deep U-shaped notch, anterior apodeme broad for most of its length with a pointed tip, with a prominent dorsal keel ( Fig. 97 ). Epandrium extending medially above cerci but not fused in middle, anal opening keyhole shaped. Surstylus paddle-shaped, anterior face with setae concentrated near margins. Pregonite indistinct, fused with postgonite. Postgonite with distal portion narrow, lobes overlapping, both narrow, truncate, posterior lobe longer. Basiphallus with very broad epiphallus, narrow preepiphallus. Distiphallus with long dorsal tube, medial portion straight and with a few spines, flanked by a single spike-like sclerite ( Fig. 96 ).

Female postabdomen: Tergites 6–7 and sternite 6 sclerotized along anterior and lateral margins only, sternites 7 sclerotized around margins with oval-shaped central unsclerotized spot. Tergites with 3 posterior strips, sternites with 2 posterior strips. Tergite 8 covered with microtomentum except anterior margin, shallowly emarginated anteriorly and posteriorly. Epiproct with very short anterior arms, microtomentum medially, with 1 pair of setae. Cerci long, narrow. Sclerites of sternite 8 subrectangular, broadened at apex, covered with microtomentum except anterior third, pinched near anterior third. Hypoproct with a bilobed anterior notch, weakly sclerotized laterally. Spermathecae sausage-shaped, about 4X longer than wide, with shallow apical invagination, sclerotized duct about as long as bulb.

Type material. Holotype ♂: PANAMA: Chiriquí: Cerro Punta, 2 km E, 1760 m, Baldwin forest, dung traps, 30 May–8 Jun 1977, S. Peck, debu01039664 ( DEBU). Paratypes: same data as holotype (5 ♂, 1 ♀, DEBU); Cerro Punta, 2 km W, 1760 m, dung, 5 Jun 1977, S. Peck (2 ♂, DEBU); Cerro Punta, 22 km W, 1760 m, collected on dung, 8 May 1977, S. Peck (3 ♂, 1 ♀, USNM); Cerro Punta, 5 km ESE, 2600 m, dung traps, 23–28 May 1977, S. Peck (1 ♂, DEBU); Hartmann's Finca, 1550 m, dung trap, 31 May 1977, S. Peck (1 ♀, DEBU); Hartmann's Finca, 15 km NW Hato de Volcán, 1200 m, dung trap, 20–25 May 1977, S. Peck (2 ♂, 2 ♀, DEBU); as above but 20–31 May 1977 (1 ♀, USNM). COSTA RICA: Guanacaste: Las Pailas Biol. Stn., 800–1200 m, 18 Feb 1996, S.A. Marshall (1 ♀, INBIO ); Puntarenas: Monteverde, near biology station, sweep, 25 May 1998, S.A. Marshall (1 ♂, DEBU); as above but 1500 m, 20 Feb 1980, D.M. Wood (1 ♂, DEBU); as above but cloud forest, FIT, 25 Jun–2 Jul 1983, H.F. Howden (1 ♂, DEBU); as above but dung traps, 19–25 Aug 1993, E.R. Barr (5 ♂, 3 ♀, DEBU, INBIO ); as above but site C, Malaise, 20–26 Aug 1993 (1 ♂, DEBU); as above but 1520 m, Nov 1992, N. Obando (1 ♀, INBIO ); as above but 1539 m, primary tropical cloudforest, Malaise trap (coarse), 25–31 May 1988, B. Hubley, D. Bell (1 ♂, ROME); as above but 1560 m, dung trap, 11–18 Jun 1983, D.H. Lindeman (1 ♂, DEBU); Monteverde Biol. Res., 1500 m, 13 Jun 2000, S.A. Marshall (1 ♂, DEBU); as above but on dung, 12 Jun 2000 (2 ♂, DEBU); as above but sweeping tree fall & trail, 14 Jun 2000, M. Buck (1 ♂, DEBU); as above but cloud forest, 11–13 Jun 2000, S.A. Marshall (3 ♂, DEBU); as above but Malaise trap, 13 Jun 2000, L.W. Quate (10 ♂, DEBU, INBIO ); as above but pans along stream, 12–13 Jun 2000, M. Buck (1 ♂, DEBU); as above but 13–14 Jun 2000 (1 ♂, 2 ♀, DEBU); as above but sweeping, 11 Jun 2000 (1 ♂, DEBU); Monteverde Biol. Stn., lower trail, cloud forest, 11 Jun 2000, S.A. Marshall (1 ♂, DEBU).

Distribution. Western Panama to northern Costa Rica (Fig. 129). Elevations from 1200–2600 m.

Etymology. The species name is an arbitrary combination of characters referring to the Cordillera de Talamanca , which includes the type locality of the species.

Figures

FIGURES 93 – 97. Boreantrops male terminalia. B. subemarginatus: 93) phallus, postgonite, and phallapodeme, lateral view, 94) sternite 5, 95) right surstylus, interior view; B. talamanca: 96) phallus, postgonite, and phallapodeme, lateral view, 97) sternite 5.