Pseudosmittia cambuciensis, Andersen & Saether & Mendes, 2010

Andersen, Trond, Saether, Ole A. & Mendes, Humberto F., 2010, Neotropical Allocladius Kieffer, 1913 and Pseudosmittia Edwards, 1932 (Diptera: Chironomidae) 2472, Zootaxa 2472 (1), pp. 1-77 : 32-34

Pseudosmittia cambuciensis sp. n.

( Figs 80–87 )

Type material. Holotype male, BRAZIL: São Paulo State, Cubatão, Cambuci, chuvosa (rainy season) 2002, F.O. Roque ( MZUSP) . Paratypes: 1 male, São Paulo State, Estação Biológica Boracéia, Salesópolis, Trilha dos Pilões , 23º39'08''S, 45º53'44.6''W, 2–5.iv.2001, Malaise trap (Bosque 4), S.T.P. Amarante et al. (BORA04: BIOTA FAPESP) ( MZUSP) ; 1 male, as previous except 23º39'08.3''S, 45º53'48.9''W, Malaise trap (Bosque 5) (BORA08: BIOTA-FAPESP) ( ZMBN) . 2 males, Paraná State, Parque Estadual do Pau Oco, Morretes , 25º34'27.9''S, 48º53'46.7''W, 10–13.iv.2002, Malaise trap (Bosque 4), M.T. Tavares et al. (BRPR24: BIOTA- FAPESP) ( ZMBN) ; 1 male, as previous except Malaise trap (Bosque 1) (BRPR27: BIOTA-FAPESP) ( ZMBN) ; 1 male, as previous except Malaise trap (Bosque 2) (BRPR32: BIOTA-FAPESP) ( ZMBN) ; 1 male, as previous except Malaise trap (Trilha 2) (BRPR34: BIOTA-FAPESP) ( MZUSP) .

Diagnostic characters. The male can be separated from other species with bifurcate gonostylus except P. roquei by the absence of an anal point and the presence of a bilobed median volsella. It differs from P. roquei by having the ventral lobe of the median volsella hidden by the dorsal lobe and thus difficult to distinguish, and by the longer gonostylus.

Etymology. Named after the type locality.

Male (n = 6–8, except when otherwise stated). Total length 1.23–1.49, 1.34 mm. Wing length 0.84–0.89, 0.87 mm. Total length / wing length 1.41–1.72, 1.54. Wing length / length of profemur 3.15–3.39 (3).

Coloration. Fully brown.

Head. AR 0.59–0.77, 0.72. Ultimate flagellomere 199–234, 220 µm long. Temporal setae 6–8, 7; consisting of 3–4, 3 inner verticals; 3–4, 3 outer verticals and 0–1, 0 postorbital. Clypeus with 6–10, 8 setae. Tentorium, stipes and cibarial pump as in Figure 80 . Tentorium 84–98, 91 µm long; 14–20, 16 µm wide. Stipes 82– 86, 84 µm long. Palpomere ( Fig. 81 ) lengths (in µm): 11–25, 15; 23–43, 28; 39–61, 55; 63–108 (3); 86–154 (2). Third palpomere with 2–3, 2 lanceolate sensilla clavata; longest 9–15, 12 µm long.

Thorax ( Fig. 82 ). Median antepronotal lobes reduced; antepronotum with 1–2, 1 lateral seta. Dorsocentrals 8–10, 9; acrostichals 2; prealars 4; supraalar absent. Scutellum with 4–5, 4 setae.

Wing ( Fig. 83 ). VR 1.50–1.61, 1.54. Anal lobe indicated. Costal extension 11–34, 21 µm long. R 4+5 ending above apex of M 3+4; Cu 1 nearly straight. Brachiolum with 1 seta, other veins bare.

Legs. Spur of fore tibia 32–39, 34 µm long; spurs of mid tibia 20–25, 22 (4) µm and 11–16, 13 µm long; of hind tibia 32–39, 34 µm and 14–18, 15 µm long. Width at apex of fore tibia 15–19, 17 (5) µm; of mid tibia 17–20, 18 (5) µm; of hind tibia 26–32, 28 µm. Comb with 11–12, 12 setae; longest 24–28, 26 µm long; shortest 15–17, 16 µm long. Length and proportions of legs as in Table 10.

Hypopygium ( Fig. 84–87 ). Anal point lacking. Tergite IX with 11–16, 13 setae. Laterosternite IX with 4– 7, 5 setae. Phallapodeme 68–73, 70 µm long. Sternapodeme evenly rounded with no trace of oral projections; arched part about 30–50, 41 µm long. Virga triangular, 16–20, 18 µm long. Gonocoxite 98–118, 104 µm long. Superior volsella 32 µm long, digitiform with weakly clubbed apex, with anterior fringe of microtrichia. Median volsella double, both lobes projecting anteriomedially, ventral lobe to varying degree covered by dorsal lobe and might be difficult to discern; dorsal lobe curved, tapering, 34 µm long, subapically fringed with long microtrichia; ventral lobe narrow, tapering, 26 µm long, fringed with few curved microtrichia. Inferior volsella with subquadrangular, 17 µm long anterior lobe, with few weak dorsal setae; median lobe 15 µm long, weakly curved, tapering, with fringe of strong, orally curved microtrichia in apical half. Gonostylus 29– 41, 36 µm long; basally with 24 µm long, broadly rounded lobe densely covered with long microtrichia; megaseta 7–9, 8 µm long. HR 2.61–3.54, 2.89. HV 3.02–4.49, 3.73.

Distribution and biology. The species is known from São Paulo and Paraná States in Brazil where it was collected in Malaise traps in areas with Mata Atlântica forest. In São Paulo it was taken on the eastern slopes of Serra Paraná Piacaba at altitudes varying from sea level up to about 800 m a.s.l. In Paraná it was collected in the nature reserve Parque Estadual do Pau Oco.

Figures

FIGURES 80–87. Pseudosmittia cambuciensis sp. n., male. 80—tentorium, stipes, and cibarial pump; 81—palp; 82— thorax; 83—wing; 84—hypopygium, dorsal aspect; 85—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right; 86—median volsella, dorsal view; 87—gonostylus.