Azana atlantica Oliveira & Balbi

Amorim, Dalton De Souza, Oliveira, Sarah Siqueira & Balbi, Maria Isabel P. A., 2008, Azana atlantica, n. sp., with reduced mouthparts and two ocelli: first record of Azana for the Neotropical region (Diptera: Mycetophilidae: Sciophilinae), Zootaxa 1789, pp. 57-65 : 59-60

Azana atlantica Oliveira & Balbi , n.sp.

( Figs. 1–6)

Diagnosis. Two ocelli, mouthparts reduced, maxillary palpus 1-segmented. Wing fumose brown, slightly darker across the mid of the wing and close to the apex; first section of Rs not sclerotized; M4 entirely absent; A1 scarcely visible. Gonostyle triangular, with a row of spines along the entire inner margin; parameres absent.

Material examined. Holotype, ɗ, BRAZIL, State of São Paulo, Salesópolis, Estação Biológica de Boracéia, Trilha dos Pilões, 23º 39’ 05.8” S, 45º 53’ 44.6” W, Malaise Trap (“trilha Ponto 4”), 30.iii– 02.iv.2001, STP Amarante & eq. cols. Paratypes: 1 ɗ, same data as holotype; 1 ɗ, same data as holotype, except 23º 39’ 06.3” S, 45º 53’ 48.9” W; 1 ɗ, idem, except 23º 39’ 05.1” S, 45º 53’ 51.8” W, 26.ii.2005.

Description. Male. Head ( Figs. 1–2). Vertex light brown, two ocelli, apart from the eye margin, ocellar area darker. Frons light yellowish brown, setose. Clypeus brown, setose. Mouthparts reduced, a single light brown palpomere, labella and palpi setose. Scape and pedicel light brown, scape trapezoidal, enlarging to the apex, elongated, pedicel more rounded, shorter; flagellum whitish yellow, with 14 flagellomeres; flagellomeres cylindrical, short, wider than long, with scattered setae. Lateral and ventral occiput setae separated from the larger, dorsal setae. Thorax ( Fig. 3 ). Mesonotum strongly arched, setose, light brown, with a pair of yellowish brown longitudinal bands connected anteriorly in each half of the scutum. Scutellum brown, setose. Pleural sclerites light brown, mesepimeron lighter dorsally. Pronotum with about 7 large setae. Primary anapleural suture complete, no secondary anapleural suture. Anepisternum with about 25 setae on dorsal half, divided dorsoventrally by an unsclerotized slender band. Laterotergite not specially protruded, with about 20 setae concentrated on posterior half; mediotergite with more than 20 setae distributed longitudinally along the entire midline. Mesepimeron produced on the ventral half, slender. Pedicel of halter whitish, knob brown, small setae on the entire pedicel. Wing ( Fig. 4 ). Length, 4.0 mm. Membrane densely covered with macrotrichia and microtricha. Membrane slightly fumose, with a brown, rounded macula from C to slightly posterior of M at the mid of the wing, and darker at the wing apex; cubital fold conspicuously brown. C ending almost halfway between R5 and M. Sc incomplete. R1 short, reaching C slightly beyond middle of the wing. R5 reaching C well before wing apex, base of Rs indistinct, r-m perfectly longitudinal, indistinct from Rs. Medial fork absent, insertion of M on r-m very basal in the wing, close to origin of CuA. CuA unforked. A1 weak but present, ending half way to wing margin. Legs. Anterior coxa yellowish, basal and distal ends brown, mid and hind coxae brown, setae on distal half; trochanters brown; anterior femur yellowish, mid and hind femora brown; all tibiae and tarsi yellowish, first tarsomere about three times the sum of the length of the remaining tarsomeres. Tibial spurs 1:2:2, brown, mid and hind legs with longer spur about twice the length of the smaller one. Abdomen. Tergites 1–2 yellowish, brownish laterally, tergites 3–7 light brown; tergite 7 arched on posterior margin. Sternites 1–3 yellowish, sternites 4–7 light brown, with a pair of longitudinal, weakly sclerotized bands. T8 and S8 brown, short. Terminalia ( Figs. 5–6 ). Terminalia brown. Gonocoxites not fused mesally, well separated from each other, with no projections on distal margin; gonostyle subtriangular, with a digitiform basal projection and a row of 21–24 elongated spines along inner margin. Tegmen relatively unmodified, rounded distally, with a pair of apodemes directed anteriorly; gonocoxal apodemes very long, projected anteriorly beyond the margin of the terminalia. No evidence of parameres (referred to as “inner styles” by Coher 1995). T9 well developed, almost rectangular. T10 not produced, cerci produced as a pair of lobes more or less fused to each other distally to T9, rather membranous, covered with dense microtricha.

Female. Unknown.

Etymology. The species name is feminine and comes from “Atlantic”, as a reference to the fact that the species is known from the Atlantic Forest of southeastern Brazil.

Figures

FIGURE 3. Azana atlantica, sp. n. Holotype. Thorax, lateral view.

FIGURE 4. Azana atlantica, sp. n. Holotype. Wing.

FIGURES 5 – 6. Azana atlantica, sp. n. Holotype. Male terminalia. 5. Ventral view. 6. Dorsal view. Abbreviations: Ce, cercus; Gc, gonocoxite; GcAp, gonocoxal apodeme; Gs, gonostyle; T 9, tergite 9; Te, tegmen.