Hyalistata cerradensis, Costa & Pirani & Oliveira, 2022

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 : 339-342

Hyalistata cerradensis sp. nov.

Material Examined. Holotype ♂ labelled as follows: Brasil, CE, Guaramiranga /-4.2702° -38.9058°/ 880 m 10.v.2014 arm. malaise/ Almeida , Lucena , Tavares (terminalia in a microvial). Deposited in MZUSP . Paratype: 2 ♀, 1 ♂ labelled as follow: 1 ♂ / Brasil, GO, Mineiros / Parque Nacional de Emas / Malaise-Parcela 12 Campo Cerrado /- 52.9957°-17.9111°/ 10.vi.2018 – 10.vii.2018 / Cols. Oliveira & Lopes (terminalia in a microvial)// 2♀ / Brasil, MG, Perdizes / EPDA, Galheiro , céu do /cavalo -19.2252°-47.1486° / Malaise, 23 ix.–5.xi.2020 / RS Capellari & Seike leg.// All deposited in MZUSP .

Diagnosis. Abdominal tergites I–II completely yellow; tergites III–V with 3 black round spots, one at center of tergite III and two on their sides; postgonite large, wider than the phallus, with a row of ca. 13 peg-prensisetae.

Male description. Head ( Fig. 3a–c ): eye dark red, bare, and large. Antenna: scape light brown; pedicel light brown with a small seta and several setulae covering its entire surface; first flagellomere light yellow, wider and slightly longer than pedicel; arista micropubescent. Frons brown, darker medially; ocellar triangle brown; ocellars seta arise from the ocellar triangle; numerous interfrontal setulae on frons. Three subequal fronto-orbital seta: two reclinate fronto-orbitals and one proclinate at mid frons, the latter slightly shorter than the two reclinates. Inner vertical setae convergent, about twice as long as outer vertical seta. Postocellar setae cruciate, close and almost as long as outer vertical seta; ca. 20 reclinate setulae in posterior half of frons. Facial carina very narrow, confined to the dorsal portion of face; parafacial light brown, more slender than gena; gena whitish; vibrissa fine present, with a row of 5–10 subvibrissal setae. Proboscis: light yellow; palpus light yellow with several setulae; labrum light yellow with setae. Thorax ( Fig. 3d ; Fig. 7a ): mesonotum entirely dark yellow, scutellum dark yellow. Anterior dorsocentral seta about half the length of the posterior dosocentral. Posterior dorsocentral seta closer to anterior dorsocentral than to scutoscutellar suture. Acrostichal setulae irregularly arranged, not in rows; 2 prescutellar acrostichals of equal length each other; apical scutellar seta convergent or cruciate, as long as basal scutellar seta; one large postpronotal seta and seven smaller postpronotal setulae (four ventral and three dorsal); two ventral notopleural setae of unequal length (anterior seta slightly longer than posterior seta), dorsal notopleural seta absent; one presutural supra-alar setae; postsutural supra-alar seta present; intra-alar seta present; two katepisternal setae of unequal length; proepisternal seta present. Legs: pale yellow; fore femur with a row of 11 anteroventral setulae; midfemur with a posteroventral row of 11 setae; preapical and apical seta present on midtibia, cuneiform setation on tibia. Wing ( Fig. 7e ): membrane completely hyaline; Sc faint, incomplete. CI (ending in M 1) with a row of stout black setae; CII (between apices R 1 and R 2+3) and CIII (between the apices of R 2+3 and R 4+5) with a row of equidistant setulae; R 2+3 and R 4+5 parallel; R 4+5 ending at wing tip. Halter: light yellow. Abdomen ( Fig. 3e–f ): tergites I and II completely yellow; tergite III with 3 round black spots on each side; tergites IV and V with 3 round, black spots (one at the center, two laterally). Male terminalia ( Fig. 4a–c ): epandrium complex with an inverted U-shape, higher than wide, almost entirely covered with microtrichia; cercus with lobes positioned at medial portion of epandrium, a row of ca. 6 long setae at the margin of epandrium near to lobes; surstylus fused to epandrium. Phallus complex: phallus indistinguishable, fused, very reduced; postgonite large, with a row of ca. 13 peg-prensisetae; phallapodeme membranous, longer than wide, not fused to hypandrium, wider next to phallus. Hypandrium Y-shaped; pregonites with four setae on each side.

Female. External morphology similar to male.

Etymology. The species epithet cerradensis refers to the Brazilian Cerrado biome, a vegetation formation that yielded most of the specimens of the new species.

Distribution. Neotropical— Brazil (Ceará, Goiás, Minas Gerais).

Figures

FIGURE 3. Hyalistata cerradensis sp. nov. (paratype, male). a) Dorsal view of head. b) Lateral view head and thorax. c) Frontal view of the head (face). d) Dorsal view head and thorax. e) Dorsal view of the abdomen. f) Lateral view of the abdomen. Scale bar: 0.5 mm.

FIGURE 4. Male terminalia of Hyalistata cerradensis sp. nov. a) Epandrial complex, terminal view. b) Phallus complex, ventral view. c) Hypandrial complex, ventral view.

FIGURE 7. Habitus dorsal and lateral of the new species of Hyalistata. a) Hyalistata cerradensis, sp. nov. dorsal view and b) lateral view. c) Hyalistata emas, sp. nov. dorsal view and d) lateral view. e) Wing of the Hyalistata cerradensis, sp. nov. and f) Hyalistata emas, sp. nov. Scale bar: 0.5 mm.Abbreviations. bm: basal medial cell, br: basal radial cell, cua: anterior cubital cell, CuA: anterior branch of cubita, CuA + CuP: anterior branch of cubital vein + posterior branch of cubital vein, dm: discal medial cell, dm-m: discal medial crossvein, h: humeral 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.