Amazunculus psilalarius Skevington, Marques & Rafael, 2019

Marques, Dayse W. A., Skevington, Jeffrey H. & Rafael, José A., 2019, Revision of the genus Amazunculus Rafael (Diptera: Pipunculidae), with description of six new species, Zootaxa 4577 (3), pp. 439-472 : 467-469

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Amazunculus psilalarius Skevington, Marques & Rafael

sp. nov.

Amazunculus psilalarius Skevington, Marques & Rafael , sp. nov.

Figs 168–181 View FIGURES 168–171 View FIGURES 172–181 F 120247 C-9B83-47B6-829C-52EE4EC7C933

Diagnosis. Antenna dark brown. Wing base hyaline. Epandrium not inflated. Surstyli symmetrical, short and distinctly pointed at apex, fused with epandrium. Phallic guide short, narrow, tapering. Phallus with two very short and pointed apical projections.

Description of male. Body length 6.3 mm. Head ( Fig. 168 View FIGURES 168–171 ). Eyes contiguous for a distance of five facets. F, EM, V = 1.0 mm, 0.2 mm, 0.4 mm. Frontal triangle black, silver pruinose. Face grey pruinose. Postcranium dark, brown pruinose dorsally and grey pruinose laterally and ventrally. Antennae ( Fig. 169 View FIGURES 168–171 ) with scape dark brown; pedicel dark brown, with six dorsal and four ventral bristles; postpedicel brown with obtuse apex. LPP/WPP = 1.8. Labellum brown. Thorax. Postpronotal lobe brown. Scutum and scutellum dark brown with brown pruinescence. Notopleuron concolorous with the scutum, mostly brown pruinose. Mesopleuron brown, grey pruinose; katatergite and anatergite grey pruinose; mediotergite black, grey-brown pruinose. Wing ( Fig. 170 View FIGURES 168–171 ). Length 9.4 mm. LW/MWW = 3.6. LTC/ LFC = 1.6. Membrane hyaline. Halter brown. Legs ( Fig. 168 View FIGURES 168–171 ). All legs dark brown; all femora and tibiae with dense grey pruinescence on posterior face. Pulvilli yellow. Abdomen. Slightly longer than wide. Dark brown with brown pruinescence. Tergite 6 and sternites 6 and 7 as in Fig. 172 View FIGURES 172–181 . Syntergosternite 8 grey-brown pruinose; about 1.4 X length of tergite 5, with a large circular membranous area ( Fig. 173 View FIGURES 172–181 ). Terminalia. Epandrium yellowish brown, not distinctly inflated ( Fig. 174 View FIGURES 172–181 ). Surstyli ( Fig. 174 View FIGURES 172–181 ) yellowish brown, symmetrical, about half the length of the epandrium, with pointed apex and fused with epandrium; in lateral view, not elongated ventrally, with distinct curvature near base ( Figs 175–176 View FIGURES 172–181 ). Phallic guide ( Figs 177–179 View FIGURES 172–181 ) short, almost as long as hypandrium; tapering evenly in ventral view ( Fig. 178 View FIGURES 172–181 ). Phallus ( Fig. 179–180 View FIGURES 172–181 ) with two sclerotized very small and pointed projections apically. Ejaculatory apodeme as in Fig. 181 View FIGURES 172–181 .

Female. Unknown.

Type material. HOLOTYPE ♂: “ VENEZUELA: T.F. Amaz. [onas], Cerro de la Neblina basecamp, 0°50'N, 66°9'44"W, 140m, 4– 12.Feb. [ii].1984, D. Davis & T. McCabe ” “ CNC DIPTERA #12295 View Materials ” “ Holotype ♂, Amazunculus psilalarius Skevington, Marques & Rafael ” ( CNC) ( Fig. 171 View FIGURES 168–171 ). GoogleMaps

Holotype condition. Right hind leg missing; left hind leg missing two terminal tarsomeres. Specimen had been covered with fungal mycelia. Mycelia mostly removed but still obscuring some pruinosity. Terminalia placed in a microvial with glycerin.

Etymology. The specific epithet ‘ psilalarius ’ is from the Greek ‘psilos’ for ‘bare’ and the Latin ‘alarius’ for ‘of the wings’, in reference to the hyaline wing base.

Geographical distribution. This species is known only from the type locality, Amazonas, Venezuela ( Fig. 183 View FIGURES 183 ).

Habitat. This species was collected in a tropical forest region in Venezuela.


Canadian National Collection of Insects, Arachnids, and Nematodes