Pseudosmittia magdae, 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 : 53-55

Pseudosmittia magdae sp. n.

( Figs 142–147 )

Type material. Holotype male, BRAZIL: São Paulo State, Parque Estadual Intervales, gruta Paiva , 14.viii.2001, CDC trap, E. Galati ( MZUSP) . Paratypes: 2 males, São Paulo State, Usina Santa Isabel, Campos do Jordão , 28.vi.2002, M.V. Yamada ( MZUSP, ZMBN) . 1 male, Paraná State, Parque Estadual do Pau Oco, Morretes , 25º34'27.9''S, 48º53'46.7''W, 10–13.iv.2002. Malaise trap (Bosque 1) M.T. Tavares et al. (BRPR28: BIOTA-FAPESP) ( ZMBN) .

Diagnostic characters. The species differ from P. forcipata by having a bilobed gonostylus with lateral lobe adpressed to gonostylus, median volsella subrectangular and superior volsella with 2–4 large tubercles with apical seta in basal half.

Etymology. Named after Dr. Magda Viviane Yamada, who made most of the chironomids sampled during her project available to us.

Male (n = 2–3, except when otherwise stated). Total length 1.44–1.71 mm. Wing length 0.83–1.13 mm. Total length / wing length 1.40–1.73. Wing length / length of profemur 3.21–3.46.

Coloration. Fully brown.

Head. AR 0.79–1.02. Ultimate flagellomere 230–319 µm long. Temporal setae 5–6, consisting of 3–4 inner verticals and 2 outer verticals. Clypeus with 9 setae. Tentorium, stipes and cibarial pump as in Figure 142 . Tentorium 82–101 µm long, 16–45 µm wide. Stipes 73–86 µm long. Palpomere ( Fig. 143 ) lengths (in µm): 14–23, 27–30, 62–83, 70–77, 79 (1). Third palpomere with 2 lanceolate sensilla clavata, 9–19 µm long.

Thorax ( Fig. 144 ). Median antepronotal lobes reduced; antepronotum with 1 (1) lateral seta. Dorsocentrals 7–10, acrostichals 2, prealars 3–4, supraalar absent. Scutellum with 4–6 setae.

Wing ( Fig. 145 ). VR 1.49–1.61. Anal lobe indicated. Costal extension 19–23 µm long. R 4+5 ending distinctly proximal to apex of M 3+4; Cu 1 slightly sinuate. Brachiolum with 1 seta, R with 0–2 setae, other veins bare.

Legs. Spur of fore tibia 34–38 µm long, spurs of mid tibia 19–23 µm and 9–14 µm long, of hind tibia 34– 39 µm and 16–21 µm long. Width at apex of fore tibia 17–23 µm, of mid tibia 18–21 µm, of hind tibia 25–40 µm. Comb of 12–13 setae, longest 32–38 µm long, shortest 16–19 µm long. Length and proportions of legs as in Table 18.

Hypopygium ( Figs 146–147 ). Anal point 12–18 µm long, 7–8 µm wide at base, with 0–4 setae. Tergite IX with 11–15 additional setae. Laterosternite IX with 2–5 setae. Phallapodeme 70–78 µm long, apodeme lobe with 2 indistinct wrinkles. Sternapodeme evenly rounded with no trace of oral projections, arched part about 45–50 µm long. Virga apparently with 2 tapering spines, 11–16 µm long. Gonocoxite 107–146 µm long. Superior volsella 28–32 µm long, sigmoid, tapering, apex projecting anteriomedially, with anterior fringe of long microtrichia in apical half and 2–4 conspicuous large tubercles with apical seta in basal half. Median volsella subrectangular with rounded apex, 11–15 µm wide at base, 21–25 µm long, covered with microtrichia and with anterior and apical fringe of long microtrichia. Inferior volsella with 6–7 µm wide, 12–15 µm long anterior lobe, with rounded to weakly bilobed apex, with few apical setae; median lobe 10–14 µm wide, 17– 18 µm long, dorsally covered with orally curved microtrichia. Gonostylus 44–56 µm long, narrow; with 30– 38 µm long lateral lobe partly fused with gonostylus, with long medially directed microtrichia; megaseta 9–11 µm long. HR 2.41–2.60. HV 2.85–3.25.

Distribution and biology. The species was taken in two nature reserves with Mata Atlântica forest in São Paulo and Paraná States at altitudes above 800 m a.s.l. In São Paulo it was collected in a light trap (CDC) while in Paraná in Malaise traps.

Figures

FIGURES 142–147. Pseudosmittia magdae sp. n., male. 142—tentorium, stipes, and cibarial pump; 143—palp; 144— thorax; 145—wing; 146—hypopygium, dorsal aspect; 147—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right.