Penniverpa evani Webb

Webb, Donald W. & Metz, Mark A., 2008, A revision of the New World genus Penniverpa Irwin and Lyneborg (Diptera: Therevidae: Therevinae), Zootaxa 1720, pp. 1-45 : 18-21

Penniverpa evani Webb spec. nov.

( Figs. 30–35 , 82 , 89 )

Etymology. This species is named for my grandson Evan Michael Webb Wettstone.

Diagnosis. The male of Penniverpa evani is similar to P. chersonesa and is separated from P. chersonesa by the distiphallus in dorsal view ( Fig. 32 ) with a broad apicolateral flange and the anterior margin of the dorsal apodeme ( Fig. 32 ) emarginate. The female differs from P. chersonesa in having white pubescence ( Fig. 82 ) posterolaterally on tergites 1–3 and 5–6 and the furca lacking an anterolateral projection.

Description of MALE. Variation (n=10).

Body length 5.5–6.7, 6.1 mm.

Head. Length 0.70–0.86, 0.80 mm. Ocellar tubercle dark brown; setae dark brown, short. Ommatidia of equal size. Frons pubescence white, dense; setae absent. Antenna with scape dark brown, pubescence gray, dense on scape, antenna/head length 0.71–0.80, 0.76; scape length 0.12–0.14, 0.14 mm, width 0.08–0.12, 0.10 mm, length/width 1.2–1.4, 1.4, scape/pedicel length 1.5–1.8, 1.7, scape/flagellum width 0.7–1.2, 1.0, setae dark brown, short; pedicel length 0.07–0.09, 0.08 mm, width 0.09–0.11, 0.10 mm, length/width 0.7–1.0, 0.8; flagellum length 0.34–0.42, 0.39 mm, width 0.10–0.12, 0.11 mm, length/width 3.0–4.2, 3.7, flagellum/scape length 2.4–3.3, 2.9. Maxillary palpus pale brown; length 0.32–0.44, 0.37 mm, width 0.06–0.08, 0.06 mm, length/width 4.3–7.3, 6.1; setae dark brown, elongate. Genal setae white, elongate. Occipital setae white, elongate, absent on dorsal half; macrosetae dark reddish brown in single row extending ventrally from lateral end of postocular setae.

Thorax. Macrosetae 2–3 np, 1–2 sa. Mesonotum brownish gray; vittae dull brown with pubescence gray, often indistinguishable; setae short black, erect to suberect intermixed with white, lanceolate, appressed setae. Pleura with dense gray pubescence, pubescence lighter on anterior fourth of anepimeron; setae white, on propleuron, anepisternum, katepisternum, laterotergite, and scutellum. Wing. Membrane pale brown; veins brown; length 4.7–6.2, 5.7 mm, width 1.8–2.3, 2.1 mm, length/width 2.6–2.9, 2.8 times longer than wide; pterostigma indistinguishable. Halter stalk dark brown, knob yellow. Legs. Coxae dark reddish brown, pubescence white; setae white. Femora dark reddish brown; ventral setae white on fore– and middle femora; av 1– 2:0:1–2, pv 0:0:3–7. Tibiae and tarsi brown.

Abdomen. Orange brown, pubescence white; dorsal setae white, elongate, appressed forming dense band across posterior margin, lateral setae white. Terminalia (MEI 088437). Dark brown. Sternite 8 ( Fig. 30 ), setae dark brown, continuous across posterior margin. Gonocoxite ventral view ( Fig. 30 ), setae dark brown, macrosetae dark brown across posterior margin; ventral lobe ( Fig. 31 ), PVL in form of narrow, basal, spinous projection. Gonostylus ( Fig. 31 ), LGP sinuate, apical macrosetae elongate, VMP absent. Aedeagus with dorsal apodeme ( Fig. 32 ), anterior margin truncate emarginate; ventral apodeme ( Fig. 33 ), extending slightly beyond anterior margin of dorsal apodeme; distiphallus dorsal view ( Fig. 32 ) tapered posteriorly with broad apicolateral flange, ventral view ( Fig. 33 ) AAP sinuate with apical spinous projections, lateral view ( Fig 34 ) tapered posteriorly in broad curved.

FEMALE. Variation (n=3).

Body length 7.3–8.0, 7.7 mm.

Head. Length 0.88–0.90, 0.89 mm. Frons pubescence white, dense; setae dark brown, short on dorsal half. Antenna with scape dark brown, pubescence gray, dense on scape, antenna/head length 0.76–0.83, 0.79; scape length 0.14–0.18, 0.17 mm, width 0.10–0.11, 0.10 mm, length/width 1.4–1.8, 1.6, scape/pedicel length 1.8–2.0, 1.9, scape/flagellum 0.8–1.0, 0.9; pedicel length 0.08–0.10, 0.09 mm, width 0.10–0.11, 0.10 mm, length/width 0.8–1.0, 0.9; flagellum length 0.42–0.48, 0.45 mm, width 0.11–0.12, 0.12 mm, length/width 3.5– 4.4, 3.9, flagellum/scape length 2.3–3.3, 2.8. Maxillary palpus length 0.40–0.46, 0.43 mm, width 0.08 mm, length/width 5.0–5.8, 5.4. Postocular macrosetae scattered.

Thorax. Macrosetae 3 np, 1–2 sa. Wing. Length 6.0–6.3, 6.2 mm, width 2.0–2.2, 2.1 mm length/width 2.9–3.1, 3.0. Halter dark brown. Legs. Anteroventral macrosetae 1–2:0:1–2, pv 0:0:3–6.

Abdomen. Reddish brown ( Fig. 82 ), pubescence white posterolaterally on tergite 1–3 and 5–6; dorsal setae dark brown short, appressed on reddish brown areas, white, elongate appressed across posterior margin of tergites 1–3. Terminalia (MEI 088479). Furca ( Fig. 35 ), posterior margin emarginate; length 0.50 mm, width 0.23 mm; anterolateral projection absent.

Distribution. Penniverpa evani is known from Ecuador, El Salvador and Panama ( Fig. 89 )

Habitats and phenology. Penniverpa evani has been collected in January, March, April, May, October, and November.

Specimens examined. Type specimens. The holotype male of Penniverpa evani Webb is labeled “ECUA- DOR: Guayas, Boliche, 25–X–1979, M. E. Irwin” (MEI 088429) and is deposited in the CAS (Type No. 18251). PARATYPES. ECUADOR. EL ORO. Canton de Machala, Machala [-3.267, -79.967], 16.IV.1977, Irwin, M.E., 1ɗ MEI 141819 (INHS), soybean. GUAYAS. 43.5 km N Santa Elena [-1.9, -80.72], 30.I.1955, Schlinger, E.I., Ross, E.S., 1ɗ MEI 0 88493 (CAS); Boliche [-2.33, -79.64], 25.X.1979, Irwin, M.E., 8ɗ MEI 0 88428, 088430–31, 088433–7 (MEIC), Malaise trap; NE Santa Elena, San Pablo [-2.149, -80.784], 1.III.1965, L. Peña, 1ɗ MEI 141568 (CNC); near Santa Elena, El Azucar [-2.25, -80.583], 10 m, 12.IV.1977, Irwin, M.E., 1ɗ MEI 141806 (INHS). LOJA. 45 km SSE Portovelo, Rio Yaguachi [-4.094, -79.465], 1080 m, 4.XI.1987, Davidson, R., Rawlins, J.E., Young, C.W., 2ɗ MEI 088510–1 (CMNH). LOS RIOS. near Quevedo, Pichilingue [-1.101, -79.483], 12.XI.1981, Irwin, M.E., 1Ψ MEI 0 34757 (INHS); Pichilingue [-1.101, - 79.483], 19.X.1956, Portman, R. W., 1Ψ MEI 0 79592 (WFBM). MANABI. Chone [-0.6833, -80.1], 9.I.1978, Mathis, W.N., 1ɗ MEI 170160 (USNM); Portoveijo [-1.06, -80.46], 17.X.1856, Portman, R.W., 1ɗ MEI 0 79589, 1Ψ 0 79590 (WFBM); Puerto Viejo [Portoviejo], Quevedo Road [-1.05, -80.45], 400 m, 13.IV.1965, Peña, L.E., 1Ψ MEI 141522 (CNC). EL SALVADOR. LA LIBERTAD. Quezaltepeque [13.83, -89.28], 20.X.1976, Irwin, M.E., Quezada, J.R., 1ɗ MEI 0 88449 (INHS). PANAMA. PANAMA. La Chorera [8.8803, - 79.7833], 22.V.1912, Busck, A., 3ɗ MEI 088479–81 (USNM); Canal Zone, Ancon [8.968, -73.551], 3.IV.1926, Greene, C.T., 1ɗ MEI 0 88512 (USNM).

Figures

FIGURE 89. Penniverpa spp., distribution map. alvatra (open circle), bradleyi (open square), dives (closed circle), evani (closed triangle), gracilis (open triangle), megaplax (asterisk), multisetosa (closed square).

FIGURES 30 – 35. Penniverpa evani. 30. Sternite 8, hypandrium, gonocoxite ventral view. 31. Gonostylus and ventral lobe dorsal view. 32. Aedeagus dorsal view. 33. Aedeagus ventral view. 34. Aedeagus lateral view. 35. Female internal reproductive organs. Scale = 0.1 mm.

FIGURES 78 – 87. Penniverpa spp., female abdomens. 78. alvatra, 79. chersonesa, 80. dives, 81. epidema, 82. evani, 83. festina, 84. gracilis, 85. insular, 86. megaplax, 87. multisetosa.