Boreantrops guatemalensis, 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 : 320

Boreantrops guatemalensis sp. nov.

( Figs. 45, 46 , 69, 110)

Diagnosis. Separable from other members of the mexicanus subgroup by the following combination of characters: Leg joints narrowly orange. Mid tibia with 1 anterodorsal bristle. Mesoscutum strongly sculptured. Male sternite 5 slightly longer than wide, not flared, with a notch in posterior margin. Male distiphallus with dorsal tube broad at tip.

Description. Head orange, occiput mostly orange with some black around foramen, ocellar triangle may be brownish, prementum brown with ventral third orange, maxillary palp yellow. Mostly covered with microtomentum, frons with microtomentum medially reaching from postocellar bristles anteriorly through ocellar triangle to anterior margin of frons, microtomentum on orbital plates reaching bases of interfrontal setae, bare in a small patch just anterior to vertical bristles, face with thin line of microtomentum below lunule and antenna. Ocellar bristles at level of anterior margin of median ocellus. Subvibrissal bristle and anterior genal bristles about 0.5X length of vibrissa.

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

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

Wing brown, veins dark brown, crossveins r-m and dm-cu white, vein R4+5 with 2 pale spots distal to crossvein r-m.

Abdominal syntergite 1+2 heavily sclerotized with a semicircular weakly sclerotized patch anteriorly, black, covered with microtomentum. Tergites 3–4 mostly heavily sclerotized, tergite 5 weakly sclerotized. Sternites weakly sclerotized.

Male postabdomen: Sternite 5 slightly longer than wide, slightly wider posteriorly, posterior margin deeply notched medially with interrupted row of setae, anterior apodeme broad, about as long as external portion, without keel ( Fig. 46 ). Surstylus paddle-shaped. Hypandrial arms with ventral tab-like structures. Pregonite small, discrete. Postgonite with lobes narrowly separated, anterior lobe broad, rounded, posterior lobe narrow, rounded. Basiphallus with long epiphallus, broad, transparent preepiphallus. Distiphallus with strongly curved spinose dorsal tube, distal portion short, broad ( Fig. 45 ).

Female postabdomen: Tergites 6–7 with anterior and lateral margins heavily sclerotized, center and posterior margin not sclerotized. Tergite 8 covered with microtomentum, except anterior margin. Epiproct without anterior arms, mostly covered with microtomentum except anterior corners, with 2 setae. Cerci broad. Sternites 6–7 with margins heavily sclerotized, center not sclerotized. Sclerites of sternite 8 broadest posteriorly, posterior half covered with microtomentum. Hypoproct lozenge-shaped, covered with microtomentum. Spermathecae about 5X longer than wide, thick-walled, annulated, apex invaginated, sclerotized duct about 0.75X as long as bulb (Fig. 69).

Type material. Holotype ♂: GUATEMALA: Zacapa : San Lorenzo, 7 km N, 2000 m, dung, 10–17 Jun 1993, B.D. Gill, debu01040417 ( DEBU). Paratypes: same data as holotype (8 ♂, DEBU); Baja Verapaz: Purulhá, 8 km S, FIT, 29 May 1991, H. & A. Howden (1 ♂, DEBU); Quetzaltenango: Zunil, 8 km SE, 2450 m, FIT #1, 17–19 Jun 1993, Ashe & Brooks (2 ♂, DEBU); as above but 2480 m, FIT #2 (1 ♂, DEBU); as above but 2630 m, FIT #4 (1 ♂, DEBU); as above but 19–21 Jun 1993 (1 ♂, DEBU); as above but 2620 m, FIT #5, 17–19 Jun 1993 (1 ♂, DEBU); as above but 2650 m, FIT, 19–21 Jun 1993 (1 ♂, DEBU). MEXICO: Chiapas: Coapilla, 5 km NE, 1990 m, 2° mesophil forest, Malaise trap, 25 May–14 Jun 2008, [no collector] (1 ♂, DEBU); as above but 2020 m, 2° mesophil forest (1 ♂, 3 ♀, DEBU, CEET); Coapilla, 5 km NNW, 1910 m, 2° mesophil forest, Malaise trap, 25 May 2008, [no collector] (1 ♂, 2 ♀, DEBU); Lagos de Montebello, Lago Pojoj, 1500 m, FIT, 2–12 Jun 1990, B. Gill (1 ♂, DEBU).

Distribution. Guatemala and Chiapas (Fig. 110). Elevations above 1500 m.

Etymology. The species name refers to the occurrence of this species in Guatemala.

Figures

FIGURES 43 – 48. Boreantrops male terminalia. B. friburguensis: 43) phallus, postgonite, and phallapodeme, lateral view, 44) sternite 5; B. guatemalensis: 45) phallus, postgonite, and phallapodeme, lateral view, 46) sternite 5; B. hispidus: 47) phallus, postgonite, and phallapodeme, lateral view, 48) sternite 5.