Denopelopia moema, Silva, Fabio Laurindo Da, Wiedenbrug, Sofia & Oliveira, Caroline Silva Neubern De, 2014

Silva, Fabio Laurindo Da, Wiedenbrug, Sofia & Oliveira, Caroline Silva Neubern De, 2014, Denopelopia moema, a new Tanypodinae (Diptera: Chironomidae) from the Neotropical Region, Zootaxa 3753 (3), pp. 297-299 : 297-299

Denopelopia moema sp. n.

( Fig. 1 )

Type material. Holotype male, Brazil, Mato Grosso do Sul, Corumbá, BEP - Mata ciliar, Rio Miranda, 02.xi- 02.xii.2011, C. J. E. Lamas & S. S. Nihei (SISBIOTA-Project). Paratypes: 3 males same data as holotype. 2 males same data as holotype except for 03-18.x.2011.

Diagnostic characters. Denopelopia moema can be distinguished from most other Denopelopia species by the abdominal segment I pale, with two lateral small brown spots on anterior margin, A II–III pale, A IV pale with one medial brown spot on anterior margin, A V–VIII with posterior dark brown bands, covering almost whole segments. Adult males of D. moema appear most similar to those of D. atria Roback & Rutter in the AR and abdominal coloration. However, the distinctive brown spots on anterior margin of abdominal segment I and IV separate D. moema from the former species.

Etymology. Refers to the main character in the epic poem "Caramuru" from Santa Rita Durão, an Indian woman of the Tupi group named Moema , which means sweet.

Description. Adult male. (n = 6)

Size. Total length 2.8–3.3 mm. Wing length 1.6–2.0 mm. Total length/wing length 3.97–4.56. Wing length/ profemur length 2.21–2.52.

Coloration. Head yellow with dark occipital margin; pedicel and antenna brown; maxillary palp pale brown. Thorax brown. Wing membrane transparent without any marking. Legs pale. Abdomen with segment I pale with two lateral small brown spots on anterior margin, A II–III pale, A IV pale with one medial brown spot on anterior margin, A V–VIII with posterior dark brown bands, covering almost whole segments. Hypopygium pale ( Fig. 1F ).

Head. Temporal setae 12–14, uniserial. Eye ratio 0.77–0.81. Tentorium 138–200 µm long. Clypeus 103–138 µm long, 63–78 µm wide at largest part, bearing 19–28 setae. Cibarial pump 215–260 µm long, with anterior margin slightly concave. Lengths of palpomeres 1–5 (in µm): 38–50; 63–88; 125–163; 160–180 (4); 233–308 (4). Antennal flagellum 940–1150 µm long, diameter of pedicel 120–140 µm, apical setae single, AR 1.60–1.80.

Thorax. Antepronotum with 3 lateral setae. Acrostichals 32–48 (4), biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 12–15, biserial anteriorly and uniserial posteriorly; prealars 6–8; supraalars 2. Anapleural suture ratio 0.52–0.57. Scutellum with transverse row of 6–8 setae and group of a few fine anterior setae.

Wing ( Fig. 1A ). Width 0.4–0.5 mm. Costa 1.5–1.8 mm long. R2+3 present. VR 0.82–0.89. WW 0.25–0.29. Brachiolum with 2 setae. Squama with 14–30 setae.

Legs ( Figs 1B–D ). Fore leg: femur 650–800 µm long, tibia 750–920 µm long, width at apex of tibia 19–28 µm, tibia with single, apical and pectinate spur 50–55 (5) µm long ( Fig. 1B ), with 3–4 (5) lateral teeth and two preapical setae, pseudospurs not observable. Mid leg: femur 710–890 µm long, tibia 770–920 µm long, width at apex of tibia 40 µm long, tibia with two, apical and pectinate spurs 28–50; 50 µm long, each with lateral 4 lateral teeth ( Fig. 1C ) and two preapical setae; pseudospurs not observable. Hind leg: femur 700–840 µm long, tibia 910–1060 µm long, width at apex of tibia 40– 50 µm long, tibia with two, apical and pectinate spurs 32–55 (5); 75–95 (4) µm long, longest spur with 4 teeth, shortest spur with 3 teeth ( Fig. 1D ); comb with 6–7 (5) bristles; pseudospurs not observable. Claws and pulvilli not observable.

Hypopygium ( Fig. 1E ). Tergite IX straight, with 8–12 posterior setae. Membranous anal point small, apical edge conical. Phallapodeme indistinct. Sternapodeme with moderate anterior process. Gonocoxite cylindrical, 125–153 µm long, 55–68 µm wide, with slightly concave inner margin. GcR 2.23–2.43. Gonostylus simple and slender, 78–95 µm long; megaseta 10–13 µm long. HR 1.57–1.84. HV 3.17–3.99.

Figures

FIGURE 1 A – F. Denopelopia moema sp. n., adult male. A. Wing. B. Fore tibial spur. C. Mid tibial spurs. D. Hind tibial spurs. E. Abdomen. F. Hypopygium, dorsal aspect.