Diplonevra truncatiseta, Corona, Emily M. & Brown, Brian V., 2005

Corona, Emily M. & Brown, Brian V., 2005, The Central American species of Diplonevra Lioy (Diptera: Phoridae), Zootaxa 1050, pp. 21-38 : 35-36

Diplonevra truncatiseta new species

Figs. 12 , 19 , 25 .

Recognition. This species keys to D. setigera in couplet 20 of Borgmeier’s (1969) key, but differs in the setation of the base of the hind femur and trochanter ( Fig. 12 ). It is more likely to be confused with D. hypermeka ; see discussion of that species for further comments.

Description. Male (female unknown). Body length 2.75–3.55 mm. Frons black. Mean frontal width 0.53 head width. Flagellomere 1 dark brown apically and light brown basally, spherical. Arista brown. Palpus yellow­brown; apex with large, pointed setae that range in length from 0.08–0.15 mm, and many small, fine setulae along margin laterally. Proboscis yellow and elongate, narrow. Scutum black­brown. Pleuron brown, tomentose, shiny. Fore­ and midlegs yellow. Ventromedial region of posterior face of hind trochanter with two thick setae and several slightly shorter, thick setae ( Fig. 12 ); laterally and dorsomedially with dense, extremely fine setae. Ventrobasal region of posterior face of hind femur with process containing two thick setae and one much thinner seta at apex ( Fig. 12 ). Apical one­third of hind femur with darkening on both anterior and posterior faces; basal two­thirds yellow. Hind tibiae dark brown. Wing brown, especially at wing tip and anterior to vein M1, vein R2+3 present, fork large ( Fig. 19 ). Costal length 0.51–0.53 wing length. Costal setae 0.09–0.11 mm. Mean costal sector ratio 3.3:1.1:1.0; range 2.9–3.8:1.0–1.3:1.0–1.4. Base of radial sector with 1 small seta. Halter light brown. Abdominal tergites black­brown. Venter of abdomen dark gray. Epandrium brown. Left side of epandrium glossy, except tomentose ventrally; posterior margin bearing two long setae. Right side of epandrium ( Fig. 25 ) tomentose, except glossy posterodorsally with several long posteroventral setae that range from 0.5–0.9 length of epandrium. Hypandrium brown. Left side of hypandrium tomentose, except glossy posterodorsally. Right side of hypandrium tomentose. Cercus light yellow, setose. Stalk of cercus yellow, setose except dorsoventrally.

Geographical distribution. Mexico to Costa Rica.

Derivation of specific epithet. Derived from Latin words for shortened seta, referring to the one incompletely developed seta of the hind femur.

Holotype. ɗ. COSTA RICA: San José: Zurquí de Moravia, 10.05°N, 84.02°W, v.1995, P. Hanson, Malaise trap, 1600 m. [ LACM ENT 089191] ( LACM).

Paratypes. COSTA RICA: Cartago: 4 km NE Canon, Genesis II, 9.71°N, 83.91°W, 1ɗ, iii.1996, 1 ɗ, vii.1996, P. Hanson, Malaise trap, 2350 m ( LACM); Heredia: Vara Blanca, 10.15°N, 84.15°W, 2ɗ, i–ii.1990, P. Hanson, Malaise trap, 2100 m ( LACM); Puntarenas: Las Alturas, 8.95°N, 82.83°W, 1ɗ, vi.1992, 1 ɗ, i–iii.1995, P. Hanson, Malaise trap, 1500 m, 2100m ( LACM); San José: 20 km S. Empalme, 1ɗ, iii–iv.1989, P. Hanson, I. Gauld, Malaise trap, 2800m ( LACM), Estación Biol. Cuerici, 9.55°N, 83.67°W, 4ɗ, i.2000, P. Hanson, Malaise trap, 2600 m ( LACM), Zurquí de Moravia, 10.05°N, 84.02°W, 1ɗ, i.1989, 1 ɗ, iii.1991, 1 ɗ, iv–v.1993, 1 ɗ, ix–x.1993, 2 ɗ, vi.1995, 1 ɗ, x.1995, P. Hanson, Malaise trap, 1600 m ( INBC, LACM, MUCR). MEXICO: Chiapas: Reserva El Triunfo, Sendero Cerro Triunfo, 15.66°N, 92.80°W, 1ɗ, 19–22.vii.1997, J. Woolley, Gonzalez, Malaise trap, 1982 m ( LACM). NICARAGUA: Matagalpa: Fuente Pura, 13.02°N, 85.92°W, 2ɗ, 6.vii.1994, J. M. Maes, Malaise trap, 1500 m ( LACM).

Figures

FIGURES 7 – 12. Diplonevra spp. Basal region of posterior face of hind tibia and trochanter (scanning electron micrographs). Figs. 7 – 8. D. setigera (Malloch), second specimen from Zurquí de Moravia, Costa Rica. Fig. 9. D. setigera (Malloch), Placerita Canyon, California, USA. Figs. 10 – 11. D. setigera (Malloch), Petropolis, Brazil. Fig. 12. D. truncatiseta new species.

FIGURES 14 – 19. Diplonevra spp. Left wings.

FIGURES 20 – 25. Diplonevra spp. Male terminalia, right lateral.