Amapeza tricincta, Marshall, 2022

Marshall, Stephen A., 2022, Amapeza and Nigripeza, new genera of Neotropical micropezid flies (Diptera, Micropezidae, Taeniapterinae), Zootaxa 5092 (3), pp. 251-272 : 262-264

Amapeza tricincta new species

Figures 6A–F

Description: Size 8 mm. Colour: Head and thorax mostly orange, clypeus dark brown with a blue sheen. Fore femur brown dorsally in basal third and darkened apically, otherwise pale; fore tarsus white, slightly yellowed near apex. Hind femur pale with three dark brown bands, one basal third, one just beyond middle, and one narrow preapical band continuous with a darkened femoral apex. Pleural bristles mostly golden, but posterior row of katepisternal bristles brown. Wing with a broad and complete but indistinct discal band. Pleuron of female abdomen densely golden setulose, pale brown except for a dark area on segments 4–5. Tergites 1–2 and anterior part of T3 of female pale brown, tergites 4–5 dark brown; tergite 6 and oviscape apparently darker dorsally at least at base but available specimens discolored; male abdominal tergites 3–4 apparently uniformly brown; S8 and epandrium also uniform but the only available male abdomen has been cleared and is in glycerin. Male abdominal pleuron darkened by dense short setulosity, darkest on dorsal third of P2.

Head: Frontal vitta slightly broadened before ocelli, then strongly tapered anteriorly with anterior margin 0.2X frontal width. Orbital plate barely differentiated from frontal vitta; epicephalon shiny. Clypeus entirely and conspicuously setulose.

Thorax: Cervical sclerite evenly convex and simple in male, with a central depression in female. Proepisternum with a row of short ventral setulae anteriorly, posterior corner with a single very long bristle widely separated from short anterior setulae. Postpronotal lobe of male almost bare, with a few inconspicuous golden posterodorsal setulae; postpronotal lobe of female with thin but long black dorsal bristles anteriorly and posteriorly, the posterior group of bristles denser and longer. One dorsocentral bristle. Mesopleuron shining, anepisternum sparsely setulose. Suprahumeral bristles small and exclinate, usually 3–5 with anterior largest.

Female abdomen: Major (paired) spermathecal duct extremely broad, distally expanded and cup-like, with thick, distally bumpy and bent spermathecal stems running from inside the cup to long, distally invaginated paired spermathecae. Single spermathecal duct very thin and short, leading to a long, slender and very small single spermatheca.

Male abdomen: Genital fork prominent, with long, narrow, incurved arms, deeply cleft basally but without inner basal processes, inner faces of arms with only short stout setae. Basal distiphallus elongate, about 1.5X as long as epandrium, with an elongate phallic bulb. Distal distiphallus much shorter, strongly recurved and ending in a broad tubular swelling (glans).

Type material: Holotype (♂, INPA). BRAZIL. Para. Oriximina, Rio Trombetas, Alcoa : Miner, M. Branco, 18.x.1982, Binda & Vidal, AR Malaise. Barcoded as Mycro 0608-20.

Paratypes: BRAZIL. Amazonas , Manaus. Jan.1979, J.A. Rafael. second label ” Grallipeza scurra (Enderlein) 1922 , det. L. Albuquerque ” (♀, INPA); Amazonas, AM.010.km.31, Embrapa, 25.x.1990, L.P. Albuquerque, J.E. Binda. Barcoded as Mycro 610-20 .

Etymology: Amapeza tricincta is named for the three distinct belt-like brown bands encircling the mid and hind tibia.

Comments: Amapeza tricincta can be easily separated from the otherwise similar A. amazonica by its entirely microsetulose clypeus, which contrasts unambiguously with the shining clypeus of A. amazonica , as well as by leg colour and katepisternal bristle colour. Amapeza tricincta is thus far known only from the lower Amazon region of Brazil, while A. amazonica is known from upper Amazon regions of Brazil, Ecuador and Peru.

Figures

FIGURES 6A–6F. Amapeza tricincta new species. A, male holotype B, female paratype; C, male terminalia; D, male sternite 5 (genital fork); E, spermathecae and associated structures, lateral; F, spermathecae and associated structures; dorsal.