Pseudiastata Coquillett, 1908

Costa, Sávio Cunha, Pirani, Gabriela & Oliveira, Sarah Siqueira, 2022, On the uncommon genera Pseudiastata Coquillett and Hyalistata Wheeler (Diptera: Drosophilidae: Steganinae): new species and additional records from the Neotropical Region, Zootaxa 5116 (3), pp. 334-350 : 336

Genus Pseudiastata Coquillett

Pseudiastata Coquillett, 1908: 148 . Type species: Pseudiastata nebulosa Coquillett, 1908 .

Diagnosis (adapted from Coquillett, 1908 and Hardy, 1959). General body color dark yellow, with all setae and setulae dark yellow; arista micropubescent; anterior fronto-orbital seta inclinate; wing dark brown maculated with two patterns: a) strongly darkened (see in Fig. 1b ), in which only the anal lobe is less dark and b) with three welldefined markings, one small macula at wing base, at the level of costal break reaching crossvein r–m, another across the anterior-posterior wing axis, at level of vein dm–m and a third small macula at R 2+3 apex. The wing membrane coloration pattern is very particular to the species. For a detailed view see Fig. 1b . In a general view, wing membrane predominantly maculated, with three main arms, one basal, one medial, and one distal. Arms not continuous, having some immaculate rounded spots in each area. Basal arm not reaching the posterior margin of the wing, ending close to the CuA + CuP. Medial and distal arms reaching the posterior margin of the wing. Frons with numerous short interfrontal setulae; abdominal tergites I–II completely dark yellow, remaining tergites with wide gray spots; surstylus fused to epandrium; lateral view of epandrium distinctly lobate or partially lobate at ventral apices; postgonite pointed and narrow.

Figures

FIGURE 1. Male lectotype herein designated of Pseudiastata brasiliensis Costa Lima (IOC). a) Habitus, frontal view. b) Wing. c) Habitus lateral. d) Habitus dorsal. e) Labels. Abbreviations. br: basal radial cell, CuA+CuP: anterior branch of cubital vein + posterior branch of cubital vein, dm: discal medial cell, dm-m: discal medial crossvein, M1: first branch of media, M4: fourth branch of media, R1: anterior branch of radius, R2+3: second branch of radius, R 4+5: third branch of radius, r-m: radial medial crossvein, Sc: subcostal vein.