Notiothereva aurea, Webb, Donald W., 2005

Webb, Donald W., 2005, Revision of the Neotropical Stiletto Fly Genus Notiothereva Metz & Irwin (Diptera: Therevidae: Therevinae), Zootaxa 1059, pp. 1-32 : 19-22

Notiothereva aurea spec. nov.

( Figs. 16–22 , 44).

Etymology. aureum (Latin, noun) = gold. This species epithet refers to the abundant gold setae on the mesonotum and scutellum and is used as a noun in apposition.

Diagnosis. Like Notiothereva albiventris and N. simulata in having the frontal setae extending lateral to antennal base; parafacial with setae; gena lacking anterodorsal patch of short, dark setae. Like N. albiventris in having dorsocentral macrosetae; halter dark brown; tibia dark yellow, apex dark reddish brown; setae on frons and parafacial predominately white; cell m 3 closed. It differs from N. albiventris in having the mesonotal setae black intermixed with gold, appressed setae; setae on scutellum gold; cervical sclerite setae white on lateral fourth; setae on male sternite 8 ( Fig. 17 ) absent medially on posterior margin; distiphallus not flattened dorsally ( Fig. 19 ), directed horizontally in lateral view ( Fig. 21 ); female furca broad posteriorly ( Fig. 22 ).

Description of holotype male (MEI 079021).

Body length 7.0 mm.

Head. Length 1.0 mm. Frons pruinescence white, dense, dark brown dorsally; setae whitish brown, elongate, extending lateral to antennal base. Antenna dark reddish brown, first flagellomere pale reddish brown, pruinescence gray, dense on scape and pedicel; antenna/head length 0.70; scape length 0.26 mm, width 0.13 mm, length/width 2.0, scape/ pedicel length 3.3, scape/flagellum width 0.81, setae dark reddish brown, elongate grading into macrosetae, macrosetae dark reddish brown; pedicel length 0.08 mm, length/width 0.6, setae dark reddish brown; flagellum length 0.36 mm, width 0.16 mm, length/width 2.3, flagellum/scape length 1.4. Parafacial pruinescence white, dense; setae whitish brown. Maxillary palpus yellow, pruinescence white, length 0.44 mm, length/width 7.3; setae white. Genal setae white, lacking anterodorsal patch of black, short setae. Occipital setae white, elongate ventrally becoming gold, appressed dorsally; macrosetae dark brown, extending ventrally from lateral end of postocular macrosetae.

Thorax. Macrosetae 3 np, 2 sa, 1 pa, 2 dc, 2 sc. Mesonotum pruinescence brownish gray, vittae indistinct; setae black, erect, elongate intermixed with gold, appressed setae. Postpronotal lobe setae whitish brown. Cervical sclerite setae white on lateral fourth. Pleuron pruinescence gray, dense; setae white, elongate on propleuron, katepisternum, and metanepisternum, whitish yellow on anepisternum and laterotergite, gold on scutellum. Wing. Membrane opaque, pale brownish gray; venation dark brown, costa along anterior margin and sc pale brown; length 5.2 mm, length/width 2.9; pterostigma dark brown; cell m 3 closed at wing margin (open in most specimens). Halter knob dark brown, stalk paler. Legs. Coxa dark reddish brown, pruinescence white, dense; apical macrosetae dark reddish brown. Femora dark reddish brown, pruinescence gray; ventral setae white; ad 0:0:0, av 2:3:4, pv 0:0:3. Tibiae dark yellowish brown. Tarsomere 1 dark yellowish brown; 2–5 dark brown.

Abdomen. Cuticle dark reddish brown, posterior third of tergites 2–7 orange brown, pruinescence white; dorsal setae white, appressed; lateral setae white, erect. Terminalia (MEI 079013) dark yellowish brown. Tergite 8 ( Fig. 16 ) setae dark yellow. Sternite 8 ( Fig. 17 ) quadrate, anterior margin slightly rounded, sides rounded; posterior margin emarginate; setae dark yellow, absent medially on posterior margin. Epandrium ( Fig. 16 ) setae dark yellow on posterior third. Cercus ( Fig. 16 ) ending above apex of hypoproct. Hypoproct ( Fig. 16 ) posterior margin truncate, ending below apex of cercus. Gonocoxite ( Figs. 17–18 ) globular, rounded laterally, tapering posteriorly to broad, rounded point, setae dark yellow, apical macrosetae dark reddish brown, setae on inner gonocoxal process dark reddish brown. Aedeagus with dorsal apodeme ( Fig. 19 ) anteromedial projection broadly rounded; ventral apodeme ( Fig. 20 ) narrow, tapered anteriorly, not reaching anterior margin of dorsal apodeme; distiphallus dorsal view ( Fig. 19 ) broad basally, tapered posteriorly, not flattened dorsally; lateral view ( Fig. 21 ) directed horizontally; ejaculatory apodeme ( Fig. 19 ) anterior third expanded, anterior margin rounded.

Morphometric variation (n=4).

Body length 7.0–7.3, 7.1 mm.

Head. Length 1.0–1.2, 1.1 mm. Antenna/head length 0.62–0.70, 0.65; scape length 0.26 mm, width 0.12–0.13, 0.12 mm, length/width 2.0–2.2, 2.1, scape/pedicel length 3.3, scape/flagellum width 0.7–0.8, 0.7, pedicel length 0.08 mm, length/width 0.6–0.7, 0.7, flagellum length 0.34–0.36, 0.35 mm, length/width 2.0–2.3, 2.1, flagellum/scape length 1.3–1.4, 1.4. Maxillary palpus length 0.40–0.46, 0.44 mm, length/width 6.7–7.7, 7.3.

Thorax. Macrosetae 3 np, 2 sa, 1 pa, 2 dc, 2 sc. Wing. Length 5.2–6.0, 5.6 mm, length/ width 2.7–3.0, 2.8. Legs. Anterodorsal macrosetae 0:0:0, av 1–3:1–4:3–6, pv 0:0:2–5.

organs. Scale = 0.1 mm.

Female.

Morphometric variation (n=10).

Body length 6.5–8.2, 7.4 mm.

Head. Length 0.90–1.14, 1.03 mm. Frons pollinose, dense; setae dark reddish brown, elongate dorsally becoming pale gold ventrally and lateral to antennal base. Antenna/head length 0.62–0.80, 0.71; scape length 0.22–0.28, 0.26 mm, width 0.12–0.16, 0.13 mm, length/width 1.7–2.3, 2.0, scape/pedicel length 2.6–3.5, 3.1, scape/flagellum width 0.7–1.0, 0.8, setae gold, elongate; pedicel length 0.08–0.10, 0.08 mm, length/width 0.6–0.8, 0.7, setae dark reddish brown, short; flagellum length 0.34–0.42, 0.38 mm, width 0.16–0.20, 0.17 mm, length/width 2.1–2.5, 2.3, flagellum/scape length 1.2–1.7, 1.5. Parafacial setae gold, elongate. Maxillary palpus length 0.40–0.60, 0.46 mm, length/width 6.0–8.3, 6.9. Occipital setae white, elongate ventrally becoming gold, appressed dorsally; macrosetae dark brown, extending across occiput.

Thorax. Macrosetae 3 np, 2 sa, 1 pa, 1–2 dc, 2 sc. Mesonotum pruinescence brownish gray, vittae indistinct; setae black, erect, elongate intermixed with gold, appressed setae. Wing. Length 5.3–6.2, 5.7 mm, length/width 2.6–3.1, 2.8. Legs. Anterodorsal macrosetae 0:0:0, av 1–4:1–2:4–5, pv 0:0–1:2–6.

Abdomen. Dark brown, pruinescence brownish gray, posterior fourth of tergites 2–6 whitish orange, pruinescence gray posterolaterally; dorsal setae dark brown, appressed on dark brown areas, white, appressed across posterior margin of tergite 1–3; lateral setae white, erect on tergites 1–2, dark brown, short on tergites 3–8. Terminalia (MEI 079002). Furca ( Fig. 22 ) quadrate, sides tapered anteriorly, posterior half expanded laterally; length 0.48 mm, width 0.38 mm; anterolateral projection short.

Immature stages. Unknown.

Distribution. Notiothereva aurea is known from Chile ( Fig. 44).

HabitatsandTemporalPhenology. Notiotherevaaurea hasbeenhand­nettedinJanuary.

Specimens Examined. Type specimen. The holotype male of Notiothereva aurea is labelled " CHILE: Valdivia, Lago Calafquen. I–25–1986, FMNH 1986, L.E. Peña Colln, Acc. # 17,422" (MEI 079021) and is deposited in the FMNH. PARATYPES. Same data as holotype, 3 males MEI 0 79006 (MEI), 0 79013 (INHS), 0 79020, (FMNH), 22 females 0 79002 (INHS), 0 79003 (MEI), 079004–5, 0 79007, 079009–12, 079014–9, 079022–8 (FMNH).

Figures

FIGURES 16 – 29. Figures 16 – 22. Notiothereva aurea. 16. Tergite 8, epandrium, cerci, hypoproct, dorsal view. 17. Sternite 8, hypandrium, gonocoxite, ventral view. 18. Gonocoxite, hypandrium, dorsal view. 19. Aedeagus, dorsal view. 20. Aedeagus, ventral view. 21. Aedeagus, left lateral view. 22. Female internal reproductive organs. Figures 23 – 29. N. bezzii. 23. Tergite 8, epandrium, cerci, hypoproct, dorsal view. 24. Sternite 8, hypandrium, gonocoxite, ventral view. 25. Gonocoxite, hypandrium, dorsal view. 26. Aedeagus, dorsal view. 27. Aedeagus, ventral view. 28. Aedeagus, left lateral view. 29. Female internal reproductive