Amazunculus acreanus Marques, Skevington & 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 : 442-444

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

Figs 1–15

http://zoobank.org/NomenclaturalActs/ 948F3DC9-0762-42B7-B2A8-2E76005D3244

Diagnosis. Antenna dark brown. Wing base darkened. Epandrium moderately inflated. Surstyli symmetrical, subtriangular, not fused with epandrium. Phallic guide short, subparallel-sided in ventral view; nearly straight in lateral view. Basal processes of phallus large, surpassing posterior margin of hypandrium. Phallus with two short, pointed projections apically.

Description of male. Body length 6.8 mm. Head ( Fig. 1 ). Eyes contiguous for a distance of sixteen facets. F, EM, V = 0.7 mm, 0.5 mm, 0.3 mm. Frontal triangle grey-brown pruinose and face grey pruinose. Postcranium dark, brown pruinose dorsally and grey pruinose laterally and ventrally. Antennae ( Fig. 2 ) with scape dark brown; pedicel dark brown, with five dorsal and five ventral bristles; postpedicel dark brown with apex rounded below. LPP/WPP = 1.7. Labellum brownish yellow. Thorax. Postpronotal lobe dark brown, grey-brown pruinose. Scutum and scutellum dark brown to black with brown pruinescence. Notopleuron concolorous with the scutum, mostly grey pruinose. Mesopleuron dark brown to black, grey pruinose; laterotergite grey pruinose; mediotergite black with brown pruinescence medially. Wing ( Fig. 3 ). Length 7.6 mm. LW/MWW = 3.8. LTC/LFC = 1.25. Membrane mostly hyaline except by darkened base. Halter with stem light brown and knob dark brown. Legs ( Fig. 1 ). All legs dark brown to black, with apices of coxae, trochanters and femora and bases of the tibiae somewhat yellow; femora with grey pruinescence on the posterior face. Pulvilli yellow. Abdomen ( Fig. 4 ). Almost as long as wide. Black with brown pruinescence, all tergites with bands of grey pruinescence posteriorly. Tergites 6, 7 and sternites 6 and 7 as in Fig. 6 . Syntergosternite 8 mostly brown pruinose; about equal in length to tergite 5 ( Fig. 4 ) and with a moderately large membranous area ( Fig. 7 ). Terminalia. Epandrium and surstyli dark yellow to light brown ( Figs 8–9 ). Surstyli ( Figs 8–9 ) symmetrical, subtriangular, not fused with epandrium; when seen in lateral view subequal in width dorsally and ventrally, not projected towards epandrium and not surpassing the margins of epandrium ( Figs 10–11 ). Phallic guide ( Figs 12–13, 15 ) short, about 1.2× the hypandrium length; subparallel-sided in ventral view ( Fig. 13 ); nearly straight in lateral view ( Fig. 15 ). Basal processes of phallus large, surpassing posterior margin of hypandrium ( Fig. 12 ). Phallus with two sclerotized small and pointed projections apically ( Figs 14–15 ). Ejaculatory apodeme as in Fig. 15 .

Female. Unknown.

Type material. HOLOTYPE ♂: “ BRASIL, AC [Acre], Rio Branco, [9°58'30.81"S, 67°49'29.67"W], 25–x a 8– xi–91, F. Ramos / A. Henriques, I. Gorayeb / N. Bittencourt ” “Armadilha 20 m Suspensa, Mata T.[erra] firme” “DW0057” “ Holotype ♂, Amazunculus acreanus Marques, Skevington & Rafael ” ( MPEG) ( Fig. 5 ).

Holotype condition. Right postpedicel lost. Right wing detached, mounted on microslide. Terminalia placed in a microvial with glycerin.

Etymology. The specific epithet refers to the type locality, Acre state.

Geographical distribution. This species is known only from the type locality, Acre, Brazil ( Fig. 182 ).

Habitat. This new species was collected in the canopy of the Amazon rainforest of the Brazilian state of Acre.

Figures

FIGURES 182. Distribution of Amazunculus species. 182, A. acreanus sp. nov., A. besti Rafael, A. bethoi sp. nov., A. cordigaster Galinkin & Rafael and A. deargentatus Galinkin & Rafael.

FIGURES 1–5. Amazunculus acreanus sp. nov. Holotype male. 1, Habitus, left lateral view; 2, Antenna; 3, Wing; 4, Abdomen, dorsal view; 5, Holotype labels. Abbreviations: bm—basal medial cell; br—basal radial cell; C—costal vein; cua— anterior cubital cell; CuA+CuP—anterior branch of cubital vein + posterior branch of cubital vein; dm—discal medial cell; dmm—discal medial crossvein; M 1 —first branch of media; M 4 —fourth branch of media; ptstg—pterostigma; R 1 —anterior branch of radius; R 2+3 —second branch of radius; r 4+5 —fourth + fifth radial cells; R 4+5 —third branch of radius; r–m—radial–medial crossvein; Sc—subcostal vein.

FIGURES 6–15. Amazunculus acreanus sp. nov. Holotype male. 6, Tergites 6, 7 and sternites 6, 7, ventral view; 7, Syntergosternite 8, posterior view; 8, Terminalia, dorsal view; 9, Surstyli, dorsal view; 10, Left surstylus, lateral view; 11, Right surstylus, lateral view; 12, Hypandrium, phallic guide and phallus, ventral view; 13, Phallic guide, dorsal view; 14, Phallus, lateroventral view; 15, Hypandrium, phallic guide, phallus and ejaculatory apodeme, left lateral view.