Ataenogera abdominalis Kröber

Hauser, Martin & Webb, Donald W., 2007, A revision of the new world stiletto fly genus Ataenogera Kröber (Diptera: Therevidae: Phycinae) with the description of two new species, Zootaxa 1530, pp. 41-67 : 45-47

Ataenogera abdominalis Kröber

( Figs. 1–9 , 56 )

abdominalis Kröber (1914:32, male desc.), Malloch (1932:255, fem. desc.), Webb and Irwin (1989:37, sp. key; 1989:38, Figs. 1 ant., 2 male head, 3 max. palp., 4. wing, 5– 9 male genit., 10 fem. abd., 11–12 fem. genit., 13– 15 pupa; 1989:39, nom.; 1989:40, desc.; 1989:41, LT male desig., dist.), Irwin and Webb 1992:86, checklist; 1992:89, desc., dist.;1992:110, Fig. 1 ant., Fig. 2 max. palp., Fig. 3 wing, Figs. 4– 7 male genit., Fig. 8 fem. abd., Figs. 9–10 fem. genit.) ( Ataenogera ). Type locality Paraguay, San Bernardino. Lectotype male in ZMHB.

gracilis Kröber (1928:117, Fig. 22 fem. ant., frons; 1928:118, desc., Fig. 23 male and fem. abd.) ( Leptocera ); Kröber (1929b:434) (Ziehenimyia, misspelling of Ziehenia ); Kröber (1929a:172, dist.) (Ziehenimyia); Webb and Irwin (1989:39, syn. desig.), Irwin and Webb (1992:87, checklist) ( Ataenogera ). Type locality Brazil, Paraná. Lectotype male destroyed.

Diagnosis. Ataenogera abdominalis is similar to A. brevicornis in possessing lanceolate setae on male tergite 7 and sternites 5–8 and female sternites 5–7. Ataenogera abdominalis differs from A. brevicornis in having the frons dark reddish brown, glossy with gray pubescence on the dorsal half and dorsally and dorsolateral to the antennal bases ( Figs. 1–2 ); in lacking dorsocentral macrosetae; in having the forefemur dark reddish brown; and the male hypandrium glabrous ( Fig. 4 ).

Redescription of male

Variation (n=10)

Body length 6.3–8.9, 7.8 mm.

Head. Length 0.76–0.84, 0.80 mm. Eyes dichoptic, separated by distance greater than width of ocellar tubercle; ommatidia smaller dorsally and laterally. Frons ( Fig. 1 ) dark reddish brown, pubescence grey dorsally, white, dense dorsolateral and lateral to antennal base with ventromedial glossy triangle; setae white, short, dorsolateral to antennal base; area lateral to antennal base with small, black, pubescent spot. Antenna brown, apical two flagellomeres dark brown, pubescence light gray, antenna/head length 1.83–2.21, 1.94; scape length 0.32–0.40, 0.36 mm, width 0.10–0.12, 0.12 mm, length/width 2.8–4.0, 3.2, scape/pedicel length 3.6–4.8, 4.0, scape/flagellum width 0.6–0.9, 0.7, setae dark reddish brown, short, macrosetae dark reddish brown; pedicel length 0.08–0.11, 0.09 mm, width 0.09–0.14, 0.12 mm, length/width 0.57–0.92, 0.74; flagellum length 1.02–1.30, 1.11 mm, width 0.14–0.20, 0.17 mm, length/width 5.8–7.4, 6.5, flagellum/scape length 2.6–3.6, 3.1. Maxillary palpus setae white. Occipital setae white, absent dorsomedially, macrosetae absent.

Thorax. Macrosetae 2 np, 1 sa, 1 pa, 0 dc, 1 sc. Mesonotum dark reddish brown to black, pubescence gray; vittae dark brown separated by gray pubescence; setae white. Pleurae dark reddish brown, pubescence white, glossy on ventral half of anepisternum and anterior half of anepimeron; setae white across dorsal fourth of anepisternum and on laterotergite. Wing. Length 4.3–5.7, 4.9 mm, width 1.3–1.5, 1.5 mm, length/width 2.8–3.7, 3.3. Membrane pale smoky brown; pterostigma brown. Cell m3 generally closed, petiolate (occasionally open widely with M2 not reaching margin of wing). Halter dark brown, ventral surface of knob white.

Legs. Coxa dark reddish brown, pubescence white, dense; setae white; apical macrosetae dark reddish brown, extending around anteroventral margin with 1–2 anteromedial macrosetae, hindcoxa with 1 posterolateral macroseta. Femora dark reddish brown, midfemora occasionally paler apically and across dorsal surface. Tibiae and tarsi dark brown.

Abdomen. Dark reddish brown, glossy, tergites 2–4 with posterior margin whitish yellow; dorsal setae dark brown, short, white, elongate laterally on tergite 1 and across posterior margins of tergites 2–4; tergite 7 and sternites 5–8 with dark brown, lanceolate setae. Terminalia (MEI 121703). Epandrium ( Fig. 3 ) dark yellow; anterior margin truncate with lateral emargination; setae dark reddish brown. Hypoproct ventral view ( Fig. 3 ) attached laterally to sides of epandrium; setae scattered. Hypandrium ( Fig. 4 ) glabrous. Gonocoxite ventral view ( Fig. 4 ) broad, outer gonocoxal process short, setae brown posterolaterally; dorsal view ( Fig. 5 ) with aedeagus attached anteriorly to gonocoxal bridge. Gonostylus dorsal view ( Fig. 5 ) flattened dorsoventrally with broad lateral lobe and medial ridge. Aedeagus with dorsal apodeme ( Fig. 6 ) oval; ventral apodeme ( Fig. 7 ) bifurcate, anterior margin deeply emarginate; distiphallus ( Fig. 8 ) broadly curved ventrally.

Redescription of female

Similar to male except for following.

Variation (n=10).

Body Length 7.2–9.3, 8.0 mm.

Head. Length 0.76–0.96, 0.89 mm. Eyes separated by distance greater than width of ocellar tubercle. Frons ( Fig. 2 ) with ocellar tubercle glossy. Antenna/head length 1.6–1.9, 1.7; scape length 0.32–0.46, 0.39 mm, width 0.10–0.13, 0.12 mm, length/width 2.7–3.8, 3.3, scape/pedicel length 3.3–5.8, 4.2, scape/flagellum width 0.71–0.93, 0.86; pedicel length 0.08–0.12, 0.09 mm, width 0.12–0.14, 0.13 mm, length/width 0.6–1.0, 0.7; flagellum length 0.94–1.10, 1.03 mm, width 0.12–0.14, 0.13 mm, length/width 6.7–8.3, 7.5, flagellum/ scape length 2.4–3.1, 2.7.

Thorax. Wing. Length 5.5–6.7, 5.9 mm, width 1.5–1.8, 1.7 mm, length/width 3.2–3.7, 3.5. Cell m3 occasionally open slightly or open widely.

Abdomen. Dark reddish brown, glossy, tergites 2–4 with posterior margin whitish yellow; dorsal setae dark brown, short, white elongate laterally on tergite 1 and across posterior margin of tergites 2–4; sternites 5– 7 with dark brown lanceolate setae. Terminalia (MEI 170082). Furca ( Fig. 9 ) triangular, anterior margin closed with broad anteromedial projection; length 0.40 mm, width 0.40 mm.

Immature stages

Unknown.

Distribution. Ataenogera abdominalis is known from Argentina, Bolivia, Brazil, and Paraguay ( Fig. 56 ).

Habitats and Phenology. Ataenogera abdominalis has been handnetted or collected in pan or Malaise traps in dry or moist washes and on dunes covered with Prosopis sp. Adults have been collected from July through March.

Specimens examined. Type specimens. Ataenogera abdominalis Kröber was originally described based on three males labeled " Paraguay, San Bernardino, K.Fiebrig S.V." without designating a holotype. Webb and Irwin (1989) designated a lectotype (MEI 005759) based on an examination of two syntype specimens borrowed from the ZMHB. The lectotype and paralectotype were lost during transport to the ZMHB. Therefore the third syntype male (ZMHB) is here designated as the lectotype. The lectotype designation is in order to fix the concept of A. abdominalis and to ensure universal and consistent interpretation of this species. The lectotype male of Leptocera gracilis Kröber was also lost during transport to the MLUH, but because this species is a synonym of A. abdominalis it is not necessary to designate a neotype. Other specimens. ARGENTINA. CATAMARCA. Trampasacha, 8 km W Chumbicha [-28.8328, -66.3048], 25.X–12.XI.2003, MEI, FDP, 1♂ MEI 170088 (MEIC); 17 km NW Chumbicha [-28.751, -66.348], 1143m, 25. VII.1971, 1 Ψ MEI 0 0 5735 (MEIC); 2 km N Belén, Quebrada Belén [-27.616, -67.013], 1094m, 17–19.X.1997, MEI, FDP, Roig, S., 2♂ MEI 106810, 108156 (MEIC), Malaise trap in dry hillside ravine; Andalgal [-27.58, -66.32], 25.X.1972, Bohart, G.E., 1Ψ MEI 0 0 8158 (EMUS); Sierra de Ambato, 18 km NW Chumbicha, Hwy 60 [-28.803, - 66.389], 950m, 5–6.IX.1999, MEI, FDP, 2♂ MEI 119675, 119707 (MEIC), Malaise trap in steep ravine; 13.IX.1999, FDP, MEI, 1♂ MEI 122752 (MEIC), pan trap in dry riverbed; 14 km N Estación Alpasinche [- 28.192, -67.135], 1119m, 16–19.X.1997, MEI, FDP, Roig, S., 1♂ MEI 106330, 1Ψ 108157 (BMNH), Malaise in dry wash; 20 km N Andalgala [-27.401, -66.316], 27.XII.1971, Brothers, D.J., Vuillemier, B.S., 1♂ MEI 0 0 7076, 1Ψ 0 0 7074 (INHS); 11 km S Palo Labrado [-28.428, -65.634], 668m, 24.X–12.XI.2003, MEI, FDP, 13♂ MEI 167808–12, 167816, 167819–21, 167824–5, 167829, 167832, 6Ψ 167813, 167815, 167817–18, 167828, 167831 (MEIC), Malaise; 16 km S Catamarca, Coneta [-28.568, -65.879], 554m, 25.X.2003, MEI, FDP, 2♂ MEI 170084 (ZMHB), 170085 (MLUH), 2Ψ 170082 (ZMHB), 170083 (MLUH); 25.X–12.XI.2003, 43♂ MEI 167863, 167865–906, 32Ψ MEI 167830, 167833–62, 167864 (MEIC), Malaise trap in dry wash; 28 km SE Tinogasta [-28.245, -67.456] 1100m, 15–19.X.1997, MEI, FDP, Roig, S., 2♂ MEI 106805–6, 1Ψ 107023 (USNM), Malaise trap dunes; 23 km S La Merced, Palo Labrado [-28.332, -65.619], 734m, 23– 25.X.2003, MEI, FDP, 1♂ MEI 170081, 1Ψ 0 78995 (MEIC), Malaise in dry wash; 24.X–12. XI.2003, 20 ♂ MEI 164114–21, 164128–30, 167780, 167788, 167801–7, 20Ψ 164137–47, 167744, 167768, 167774, 167778, 167785, 167794, 167796, 167798, 167800 (MEIC), Malaise in dry wash; 4 km W Chumbicha [- 28.856, -66.269], 440m, 13–15.IX.1999, MEI, FDP, 1♂ MEI 124662 (MEIC), Malaise; 8 km W Chumbicha, Trampasacha [-28.833, -66.305], 650m, 25.X–12.XI.2003, MEI, FDP, 5♂ MEI 167814, 167822–3, 167827, 170088, 1Ψ 167826 (MEIC), Malaise in damp wash; 17 km NW Chumbicha [-28.751, -66.348], 1143m, 25.VII.1971, Pearson, C.A., 1Ψ MEI 0 0 5735 (CUIC); San Pablo [-28.697, -66.043], 712m, 24.X–12.XI.2003, MEI, FDP, 9♂ MEI 164871 (CUIC), 164872 (CNC), 166929–31, 166933–6 (MEIC), 9Ψ 165130 (CNC), 166932 (CRIC), 166937, 166952–4, 166956, 166963, 166965 (MEIC), Malaise in small dry wash; 12.XI.2003, MEI, FDP, 2♂ MEI 161650–1 (MEIC). LA RIOJA. La Rioja [-29.408, -64.858], –.1928, collector?, 1Ψ MEI 0 0 5734 (IMLA); Sierra de Argañaraz, El Rocillo [-31.207, -66.713], 722m, 11–22.X.1997, MEI, FDP, Roig, S., 1♂ MEI 108159, 1Ψ 108158 (MEIC), Malaise trap in wash with some water; 22.X.1997, MEI, FDP, Roig, S., 6♂ MEI 106811–16 (MEIC), pan trap in wash with some water; Penaloza, R.V., east base of Sierra de Argañaraz [-31.221, -66.728], 610 m, 11–23.X.1997, MEI, FDP, Roig, S., 2Ψ MEI 107020–1 (MEIC), Malaise trap in wet spot in wash; Penaloza, R.V., Sierra de Argañaraz, 1 km W El Rocillo [-31.207, - 66.714], 716 m, 22.X.1997, MEI, FDP, Roig, S., 4♂ MEI 106803–4, 106807–8, 2Ψ MEI 107029–30 (MEIC), Malaise trap Malaise in dry canyon. MENDOZA. Nacunan [-34.05, -67.967], –. I–II.1997, Debandi, G., 1♂ MEI 106817 (CRIC); Lavalle, [-32.382, -68.055], 10–23.X.1997, MEI, FDP, Roig, S., 1Ψ MEI 108150 (MEIC), Malaise trap, inland dunes. SALTA. 10 km S Cafayate [-26.151, -65.955], 1644m, 22–26.X.2003, MEI, FDP, 1♂ MEI 170089 (MEIC), Malaise in Prosopis sp. covered dunes; 26.X–13. XI.2003, 15 ♂ MEI 164122–7, 164131–6, 166412, 170086–7, 3Ψ 164145, 161652, 170091 (MEIC), Malaise in Prosopis sp. covered dunes; 13.XI.2003, MEI, 1Ψ MEI 161652 (MEIC), Prosopis sp. covered dunes; 48 km N Cafayate [-25.84, -65.703], 1408m, 26.X–13.XI.2003, MEI, FDP, 2♂ MEI 165110, 170090, 1Ψ 172223 (MEIC), Malaise trap in small wash; 8 km N La Vina [-25.396, -65.545], 1171m, 22–26.X.2003, MEI, FDP, 25♂ MEI 172198–222, 33Ψ 172224–56 (MEIC), Malaise trap in dry wash; Yachacuva, 12.XII.1975, Bohart, R.M., 1♂ MEI 0 0 7075 (INHS). SAN JUAN. Caucete, 13 km WSW Marayes [-31.556, -67.434], 10–23.X.1997, MEI, FDP, Roig, S., 2♂ MEI 106809, 108155, 15Ψ107022 107024–8, 107031, 107034–40, 108151 (MEIC), Malaise trap; 23.X.1997, MEI, 1Ψ MEI 107032 (MEIC). SAN LUIS. Santa Rosa [-32.342, -65.199], 15.XI.1951, Duret, 1♂ MEI 118141 (MNHN). SANTIAGO DEL ESTERO. Near Icaño [-28.683, -62.9], –.1909, Wagner, E.R., 1Ψ MEI 118153 (MNHN). TUCUMAN. Amaichá [Amaichá del Valle] [-26.6, -65.917], 16.XI.1966, Stange, L.A., 1♂ MEI 0 0 5732 (IMLA). BOLIVIA. BENI. Opposite Costa Marques ( Brazil), Rio Itenez [-12.478, -64.231], 30– 31.VIII.1964, Bouseman, Lussenhop, 1Ψ MEI 0 0 5738 (AMNH); 1–3. IX.1964, 1 Ψ MEI 0 0 5736 (AMNH); 4– 6. IX.1964, 1 ♂ MEI 0 0 5737 (AMNH); Rio Itenez, Pampa de Meio, 11–13.IX.1964, Bouseman, Lussanhop, 1Ψ, MEI 0 0 5739 (AMNH). SANTA CRUZ. Rio Seco [-18.664, -63.24], 610 m, 18.VIII–2.IX.2000, MEI, Hauser, M., 3♂ MEI 121716 –8 (MEIC), Malaise trap; 11 km N Boyuibe [-20.39, -63.373], 884m, 28.II– 6.III.1999, MEI, FDP, 3Ψ, MEI 125341, 110566 –7 (MEIC), Malaise trap; San José de Chiquitos [-17.833, - 60.783], 14.X.2000, Partin, S., 3♂ MEI 129035–6, 129039, 3Ψ 129040–2 (MEIC); 20 km S Camiri [-20.183, -63.473], 1082 m, 4.III.1999, MEI, FDP, 1♂ MEI 111744 (MEIC), Malaise trap; 20 km S Camiri, Quebrada Isiri [-20.174, -63.479], 865m, 18.VIII–2.IX.2000, MEI, Hauser, M., 82♂ MEI 118743, 118747–8, 118753–4, 118757, 118759–61, 118763, 118767–70, 118775, 118777–9, 118781, 118785–8, 118790, 118794–5, 118797, 118799–800, 118802–6, 118808–11, 118814–5, 118817–8, 118820, 118822, 118824, 118829–30, 118832, 118834–5, 118846–9, 119717, 119719–20, 119722, 119724, 119741, 119743–4, 119746–7, 119750–1, 119753–4, 119757–8, 119773–7, 119779, 119781, 119784–5, 119787–8, 119790, 64Ψ 118740–2, 118744–6, 118749–52, 118755–6, 118758, 118762, 118764–6, 118771–4, 118776, 118780, 118782–4, 118789, 118796, 118798, 118801, 118812–3, 118816, 118819, 118821, 118823, 118825–8, 118831, 118833, 118845, 119716, 119718, 119721, 119723, 119725–6, 119740, 119742, 119745, 119748–9, 119752, 119755–6, 119772, 119778, 119780, 119782–3, 119786, 119789 (MEIC), Malaise trap; 2.IX.2000, Hauser, M., 1Ψ MEI 121727 (INHS); 12 km W Boyuibe [-20.384, -63.404], 890m, 18.VIII–2.IX.2000, MEI, Hauser, M., 3♂ MEI 121186, 121304, 121312, 4Ψ 121169, 121194, 121319, 121322 (CSCA), Malaise trap; 24 km S Camiri [-20.197, 63.476], 1082m, 4.III.1999, MEI, FDP, 32♂ MEI 111742 –3, 121679 –80, 121688 –715, 16Ψ 121687, 121719 – 26, 121728 –34 (MEIC), Malaise trap. BRAZIL. PARANA. –.XII.–, 1♂ MEI 0 0 5741, 1Ψ 0 0 57422 (MULH, Lectotype specimen destroyed). PARAGUAY. CORDILLERA. San Bernardino [-25.265, -57.316], Fiebrig, K., 3♂ MEI 005759–61 (ZMHB, Lectotype specimen destroyed). NUEVA ASUNCION. Teniente Encisco National Park [-21.217, -61.65], 26–28.III.1986, Pogue, M., Solisa, M., 1Ψ MEI 0 0 9269 (USNM). SAN PEDRO. Cororo, Rio Ypane, [-23.467, -56.518], 1–4.XII.1983, Wasbauer, M., 1Ψ MEI 0 72551 (CSCA), Malaise trap.

Figures

FIGURE 56. Distribution map; Ataenogera abdominalis (closed circle), A. grandis (open circle), A. irwini (closed square), A. minuta (asterisk).

FIGURES 1 – 9. Ataenogera abdominalis. 1. male frons. 2. female frons. 3. epandrium, cerci, hypoproct, ventral view. 4. hypandrium, gonocoxite, gonostylus, ventral view. 5. aedeagus, gonocoxite, gonostylus, dorsal view. 6. aedeagus dorsal view. 7. aedeagus ventral view. 8. aedeagus, lateral view. 9. female reproductive organs. Scale = 0.1 mm. Abbreviations: C = cercus, CSpD = common spermathecal duct, DA = dorsal apodeme, EA = ejaculatory apodeme, Epa = epandrium, F = furca, Gx = gonocoxite, GxA = gonocoxal apodeme, Gs = gonostylus, Hpt = hypoproct, H = hypandrium, Dp = distiphallus, Sp = spermatheca, VA = ventral apodeme.

FIGURES 20 – 29. Ataenogera brevicornis. 20. male frons. 21. female frons. 22. epandrium, cerci, hypoproct, ventral view. 23. hypandrium, gonocoxite, gonostylus ventral view. 24. gonostylus, dorsal view. 25. aedeagus, dorsal view. 26. aedeagus, ventral view. 27. aedeagus, lateral view. 28. female terminal abdominal segments. 29. female reproductive organs. Scale = 0.1 mm.