Oukuriella plumaterata, 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 : 191-193

Oukuriella plumaterata sp. nov.

( Figures 3–4 )

Type material. Holotype male, BRAZIL, São Paulo, Salesópolis, Estação Biológica de Boracéia, 23°31’55”S, 45°50’45”W, 13.x.2001, light trap, leg.: Froehlich, C.G. ( MZUSP).

Etymology. From Latin pluma: feather, teres: soft, delicate and ata: carrier, referring to the delicate setae present on tergite IX.

Diagnosis. Oukuriella plumaterata sp. nov. differs from other species of the genus by the following characteristics: male, wings with dark markings, thorax without scutal tubercle, abdomen with dark areas, tergites II–VII with tufts of setae, present of bands on tergite, legs with dark areas, posterior margin of tergite IX without lateral projections, width of the concavity in the midline of the posterior margin of tergite IX similar to the length of its depth, ventral region with tufts of setae in projections that exceed the posterior margin of tergite IX, superior volsella falciform with digitus same shape and size, superposing, inferior volsella with simple setae. O. plumaterata sp. nov. resembles O. froehlichi Fusari et al. 2014 , from which it can be distinguished by tufts of setae in projections in the ventral region that exceed the posterior margin of tergite IX.

Description.

Male (n = 1). Total length 3.87 mm. Wing length 2.45 mm, width 0.79 mm. Total length/wing length 1.57. Wing length/profemur length ratio 2.84.

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

Head ( Fig. 3 A). AR 1.03. Apical flagellomere 711 µm long. Temporals 20. Clypeus with 50 setae. Lengths of palpomeres 1–5 (in Μm): 19; 17; 97; 79; 99.

Wing ( Fig. 3 B). VR 1.28. Brachiolum with 4 setae. R with 19, R1 with 21, R4+5 with 13 setae, remaining veins and cell membranes bare.

Thorax. Without scutal tubercle. Ac 5. Dc 13. Scts 2.

Legs ( Fig. 3 D). Lengths (in Μm) and proportions of leg segments as in Table 2 . Tibial spur lengths (in Μm): fore 60, middle 168, hind 112.

Abdomen ( Fig. 3 C). Tergites II–VII with a large tuft of setae in the anterior median region.

Hypopygium ( Figs 3 E, 4A–B). Laterosternite IX with 3 setae. Present of bands on tergite IX. Posterior margin of tergite IX without lateral projections. Width of the concavity of the posterior margin of tergite IX same length as depth of the indentation. Phallapodeme 83 µm long, transverse sternapodeme 63 µm long. Superior volsella falciform 97 µm long, 13 setae near bend of upper arm. Digitus long, reaching the apex of the upper volsella, without microtrichia, 108 µm long. Inferior volsella 113 µm long, with 3 basal setae, 2 dorsal setae and 12 apical setae. Gonocoxite 190 µm long. Gonostylus 115 µm long. HR 1.65. HV 3.36.

Female and immatures. Unknown.

Distribution. This species is known only from the type locality in the State of São Paulo, Brazil.

Figures

FIGURE 3. Oukuriella plumaterata sp. nov., male: A. head; B. wing; C. abdomen; D. legs; E. hypopygium.

FIGURE 4. Oukuriella plumaterata 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 2. Lengths (in µm) and proportions of legs of Oukuriella plumaterata sp. nov., male (n = 1).

	Fe	Ti	ta1	ta2	ta3
P1	940	523	508	313	205
P2	853	531	377	238	142
P3	860	539	840	533	379