Boreantrops longiphallus, 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 : 325-326

Boreantrops longiphallus sp. nov.

( Figs. 53, 54 , 72, 114)

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 narrow at tip, with a distinct thin apical extension.

Description. Head orange, occiput black with orange around posterior margin of eye, ocellar triangle 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 only reaching bases of 1 or 2 anterior interfrontal setae reaching, bare in a small patch just anterior to vertical bristles, face with patch of microtomentum below antenna reaching ventrally to level of U-shaped mark. 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 and in a thin line along anterior margin below spiracle, 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 broadly notched with interrupted row of setae, anterior apodeme broad, short, without keel ( Fig. 54 ). Surstylus paddleshaped. Hypandrial arms with ventral tab-like structures. Pregonite small, discrete. Postgonite with lobes widely separated, anterior lobe broad, rounded, posterior lobe narrow, pointed. Basiphallus with long epiphallus, broad, transparent preepiphallus. Distiphallus with strongly curved spinose dorsal tube, distal portion long with a thin extension at tip ( Fig. 53 ).

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 slightly longer than wide, annulated, apex invaginated, sclerotized duct about 3X as long as bulb (Fig. 72).

Type material. Holotype ♂: GUATEMALA: Guatemala: Santa Catarina Pinula, 1840 m, dung traps, 11–13 Jun 1991, B.D. Gill, debu01040466 ( DEBU). Paratypes: same data as holotype (6 ♂, DEBU); Baja Verapaz: Purulhá, 8 km S, FIT, 29 May 1991, H. & A. Howden (2 ♂, DEBU); Sacatepéquez: Antigua, 5 km SE, 2145 m, hardwood forest, Malaise trap, 10–13 Jun 2009, [no collector] (2 ♂, DEBU); as above but 2330 m, oak forest (3 ♂, 4 ♀, DEBU); as above but 2125 m, hardwood forest (2 ♂, 1 ♀, DEBU, UVGC); as above but 2335 m, oak forest (3 ♂, 5 ♀, DEBU, UVGC). EL SALVADOR: Santa Ana: Cerro Verde summit, 4 mi down, 20 Aug 1972, G.F. & S. Hevel (1 ♂, USNM). MEXICO: Chiapas: Lagos de Montebello, Lago Pojoj, 1500 m, FIT, 2–12 Jun 1990, B. Gill (1 ♂, DEBU); San Cristóbal de las Casas, dung traps, 26–28 May 1990, B. Gill (23 ♂, DEBU); as above but 2200 m, FIT, 20–27 May 1990, Howden & Gill (1 ♂, DEBU); as above but 7000 ft, 26 May 1969, H.J. Teskey (1 ♂, CNCI); as above but 7087 ft, 18–25 Jun 1969, B.V. Peterson (1 ♂, CNCI); San Cristóbal de las Casas, 8 mi NE, 7500 ft, 15 May 1969, H.J. Teskey (1 ♂, CNCI); Yerba Buena, 20 mi. N Bochil, 24 Jun 1969, W.R.M. Mason (1 ♂, CNCI); Durango : La Ciudad, 24 mi W, 2134 m, 4 Aug 1964, W.R.M. Mason (1 ♂, CNCI); México: Temascaltepec, 3 mi. NE, 1920 m, oak, madrono, pine, human dung, 2–7 Sep 1971, A. Newton (1 ♂, DEBU); Tenancingo, 3 mi SW, 2164 m, oak, juniper, human dung, 6 Sep 1971, A. Newton (1 ♂, DEBU); Oaxaca: Ixtlan de Juarez, 14.2 mi S, 2316 m, oak woodland, dung, 10–18 Aug 1973, A. Newton (1 ♂, DEBU); Suchixtepec, 8 km S, 10 Aug 1986, H. & A. Howden (3 ♂, DEBU); Sinaloa: El Palmito, 4.5 mi W, 6500 ft, 4 Aug 1964, W.R.M. Mason (1 ♂, CNCI).

Distribution. Widespread from El Salvador and Guatemala north to Durango (Fig. 114).

Etymology. The species name refers to the extended tip of the dorsal tube in the male distiphallus.

Figures

FIGURES 49 – 54. Boreantrops male terminalia. B. hondurensis: 49) phallus, postgonite, and phallapodeme, lateral view, 50) sternite 5; B. inbio: 51) phallus, postgonite, and phallapodeme, lateral view, 52) sternite 5; B. longiphallus: 53) phallus, postgonite, and phallapodeme, lateral view, 54) sternite 5.