Oukuriella angelomachadoi, Bellodi, Carolina Ferraz, Fusari, Lívia Maria & Roque, Fabio De Oliveira, 2016

Bellodi, Carolina Ferraz, Fusari, Lívia Maria & Roque, Fabio De Oliveira, 2016, New species and records of Oukuriella Epler, 1986 from the Neotropical region (Diptera: Chironomidae), Zootaxa 4078 (1), pp. 187-196 : 188-190

Oukuriella angelomachadoi sp. nov.

( Figures 1–2 )

Material studied. Holotype male, BRAZIL, Paraná, Boa Vista da Aparecida, UHE Salto Caxias, 25°32’35.68”S, 53°29’48.04”W, 24.viii.2005, light trap, leg.: Soares ( MZUSP). Paratype: 1 male, with the same data as holotype ( MZUSP).

Etymology. The species is named after Angelo B. M. Machado on the occasion of his 80th birthday.

Diagnosis. Oukuriella angelomachadoi sp. nov. differs from other species of the genus by the following characteristics: male, wings with light dark markings, thorax without scutal tubercle, absence of bands on tergite, posterior margin of tergite IX with rounded lateral projections, concavity width between these projections two times greater than its depth, superior volsella pediform with large digitus, inferior volsella with simple setae. Oukuriella angelomachadoi sp. nov. closely resembles Oukuriella rimamplusa Fusari et al. 2013 , from which it can be distinguished by the shape of the superior volsella and markings on wings.

Description.

Male (n = 1–2). Total length 2.13–3.05 mm. Wing length 1.48–2.11 mm, width 0.48–0.62 mm. Total length/ wing length 1.43–1.44. Wing length/profemur length ratio 1.78–1.85.

Color. Thorax light brown. Wings with light dark markings, veins light brown. Legs light brown with dark brown areas.

Head ( Fig. 1 A). AR 1.06. Apical flagellomere 458 µm long. Temporals 8. Clypeus with 23–46 setae. Lengths of palpomeres 1–5 (in Μm): 26–41; 30–38; 82; 72; 134.

Thorax ( Fig. 1 B). Without scutal tubercle. Ac 3–5. Dc 7–8. Pa 1. Scts 3–4.

Wing ( Fig. 1 D). VR 1.20–1.30. Brachiolum with 3 setae. R with 5–9, R1 with 3–8, R4+5 with 9–10 setae, remaining veins and cell membranes bare.

Legs ( Fig. 1 E). Lengths (in Μm) and proportions of leg segments as in Table 1 . Tibial spur lengths (in Μm): foreleg 32, middleg 29–43, hindleg 44–68.

Abdomen ( Fig. 1 C). Tergites II–VII with a large tuft of setae in the anterior median region.

Hypopygium ( Figs 1 F, 2A–B). Laterosternite IX with 3–4 setae. Absence of bands on tergite. Posterior margin of tergite IX with lateral rounded projections. Concavity width between these projections two times greater than its depth. Phallapodeme not observable, transverse sternapodeme 46–51 µm. Superior volsella pediform 77–121 µm long, with 24 setae near bend of upper arm. Digitus wide, the same width as superior volsella, not reaching the apex of the superior volsella, without microtrichia. Inferior volsella 125–140 µm long with 3–6 basal setae, 7–8 apical setae. Gonocoxite 128–131 µm long. Gonostylus long 126–146 µm long. HR 0.89–1.01. HV 1.69–2.08.

Female and immatures. Unknown.

Distribution. This species is recorded only in the type locality in the State of Paraná, Brazil.

Figures

FIGURE 1. Oukuriella angelomachadoi sp. nov., male: A. head; B. thorax; C. abdomen; D. wing; E. legs; F. hypopygium.

FIGURE 2. Oukuriella angelomachadoi sp. nov., male: A. dorsal aspect of hypopygium with gonocoxite and gonostylus on the left; B. hypopygium with tergite IX removed, left dorsal view, ventral right view.

Tables

TABLE 1. Lengths (in µm) and proportions of legs of Oukuriella angelomachadoi sp. nov., male (n = 1 – 2).

	Fe	Ti	ta1	ta2	ta3
P1	808–1181	408–602	777	584	385
P2	839–1214	479–680	533–750	194–279	134–210
P3	922–1313	501–714	499–668	263–400	268–359