New species of Lopescladius (Cordiella) Coffman et Roback (Chironomidae: Orthocladiinae) from Brazil Author Hagenlund, Linn K. Author Andersen, Trond Author Mendes, Humberto F. text Zootaxa 2010 2728 39 49 journal article 46909 10.5281/zenodo.200103 ebd0dce8-ee56-452e-a166-12130433ac7d 1175-5326 200103 Lopescladius (Cordiella) uncatus sp. n. ( Figs 17–21 ) Type material. Holotype male, BRAZIL : São Paulo , Estação Biológica Boracéia, Rio Claro, 2nd bridge, 09.xii.2002 , light trap, H.F. Mendes & C.G. Froehlich ( MZUSP ). Diagnostic characters. The species is pale brown, has a wing length of 0.71 mm , antennal ratio of 0.30 and the posterior branch of the superior volsella is hooked apically and projecting orally. Etymology. From Latin uncus , hook, angle, using the suffix -atus , provided with, referring to the apically hooked main branch of the superior volsella. Description (male, n = 1). Total length 1.37 mm . Wing length 714 µm. Total length / wing length 1.92. Wing length / length of profemur 2.58. Coloration . Head, thorax and abdomen pale brown, legs pale yellowish. Head . Antenna with 13 flagellomeres, ultimate flagellomere 97 µm long. AR 0.30. Temporal setae 7, weak; in single, irregular line posterior on head. Clypeus with 4 setae. Tentorium, stipes and cibarial pump as in Figure 17 . Tentorium 106 µm long, 18 µm wide. Stipes 73 µm long, 5 µm wide. Palpomere lengths / widths (in µm): 14 / 15, 16 / 13, 30 / 14, 36 / 11, 61 / 7. Third palpomere with 1 sensillum subapically, 11 µm long. Thorax ( Fig. 18 ). Antepronotal 1, weak; dorsocentrals 2; prealars 2. Scutellum with 2 setae. Wing ( Fig. 19 ). VR 1.55. Costal extension 8 µm long; false costal extension about 72 µm long. Brachiolum with 1 seta, other veins bare. Squama bare. Legs . Spur of fore tibia 20 µm long. Mid tibia with 1 spur, 23 µm long. Hind tibia with 1 spur, 27 µm long and comb of 11 setae, shortest seta 7 µm long, longest 16 µm long. Lengths and proportions of legs as in Table 3 . TABLE 3. Length (in µm) and proportions of legs of Lopescladius (Cordiella) uncatus sp. n. , male (n = 1). fe ti ta1 ta2 ta3 ta4 ta5 LR BV SV BR p1 277 297 68 27 15 10 18 0.22 9.13 8.43 – p2 – – – – – – – – – – – p3 – 299 77 41 18 9 17 0.26 – – – Abdomen . Tergite I without seta, tergites II–IV with 1 strong median seta, tergites V–VII with 1 strong median and 1 weaker lateral setae on each side, tergite VIII with 2 strong median and 1 weaker lateral setae on each side. Sternite I without seta, sternite II with 1 strong median and 1 weaker lateral setae on each side, sternites III–IV without setae, sternites V–VIII with 1 median seta. FIGURES 17–21. Lopescladius (Cordiella) uncatus sp. n. , male. 17 —tentorium, stipes and cibarial pump; 18 —thorax; 19 —wing; 20 —hypopygium with tergite IX removed, dorsal aspect to the left and ventral aspect to the right; 21 — hypopygium, dorsal aspect. Hypopygium ( Figs 20–21 ). Tergite IX with rounded, lateral protrusions, each with 5 setae (1 very strong and 4 weaker); posterior margin broadly rounded. Phallapodeme 34 µm long; transverse sternapodeme 32 µm long. Gonocoxite 57 µm long. Superior volsella double; anterior branch nail-shaped, 8 µm long, 4 µm wide medially; posterior branch digitiform with apical hook, 33 µm long, 7 µm wide medially. Gonostylus 22 µm long. HR 2.63. HV 6.36. Remarks. L. (C.) uncatus sp. n. is a small, pale brown species. It can easily be recognized on the shape of the posterior branch of the superior volsella, which is hooked apically and projecting orally; in the other described species this volsella is gently curved and projecting anteromedially. Female, pupa and larva. Unknown. Distribution and biology. The single specimen was collected in a light trap close to a third order stream in a fragmented Mata Atlântica forest in São Paulo State in southeastern Brazil .