Pseudosmittia lamasi, 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 : 49-50

Pseudosmittia lamasi sp. n.

( Figs 131–135 )

Type material. Holotype male, BRAZIL: São Paulo State, Estação Ecológica Juréia-Itatins, Peruíbe , 24º31'06''S, 47º12'06''W, 3.v.2002, Malaise trap (Trilha 1), N.W. Perioto et al. (PEJU17: BIOTA-FAPESP) ( MZUSP) . Paratype: 1 male, as holotype except 6.v.2002, (PEJU11) ( ZMBN) .

Diagnostic characters. The large lobe-like superior volsella with median volsella either lacking or fused with inferior or superior volsella is unique within the genus. The presence of a hyaline anal point is unique among the Neotropical species.

Etymology. Named after Carlos J. E. Lamas, curator at MZUSP and responsible for making the BIOTA- FAPESP project material available to us.

Male (n = 1–2). Total length 1.62 mm. Wing length 0.84–0.90 mm. Total length / wing length 1.81. Wing length / length of profemur 2.51–2.87.

Coloration. Thorax and abdomen brown, legs pale brown.

Head. AR 0.83, ultimate flagellomere 252 µm long. Temporal setae 3–5, including 1–3 inner verticals and 2 outer verticals. Clypeus with 5–6 setae. Tentorium, stipes and cibarial pump as in Figure 131 . Tentorium 79– 88 µm long, 14–16 µm wide. Stipes 81–95 µm long, 23 µm wide. First and second palpomere lengths (in µm): 14, 20–25, remaining segments lost.

Thorax ( Fig. 132 ). Median antepronotal lobes reduced; antepronotum with 1 lateral seta. Dorsocentrals 8– 9, acrostichals 2, prealars 3, supraalar absent. Scutellum with 2–6 setae.

Wing ( Fig. 133 ). Anal lobe weakly developed. Cu 1 curved. R 4+5 ending opposite to apex of M 3+4. VR 1.46– 1.57. Costal extension 25–29 µm long. Brachiolum with 1 seta, other veins bare.

Legs. Spur of fore tibia 38 µm long, of mid tibia 18 µm and 16 µm long, of hind tibia 36 µm and 18 µm long. Width at apex of fore tibia 18–23 µm, of mid tibia 20 µm, of hind tibia 27 µm. Comb with 9–10 setae, longest 27–32 µm long, shortest 18 µm long. Length and proportions of legs as in Table 16.

Hypopygium ( Figs 134–135 ). Anal point hyaline, bluntly triangular, 18–21 µm long, 11–13 µm wide at base, with 2–4 setae at base. Tergite IX with 6–10 additional setae. Laterosternite IX with 3 setae. Phallapodeme 61–75 µm long. Sternapodeme evenly rounded, with no trace of oral projections, arched part about 41– 50 µm long. Virga 9–11 µm long, apparently without lateral lamellae. Gonocoxite 120–127 µm long. Superior volsella broadly rounded, 29–30 µm wide at base, about 17–20 µm long, with few marginal microtrichia. Inferior volsella with 19–21 µm long, 12–16 µm wide anterior lobe, triangular in apical half, with few dorsal setae; posterior lobe rounded. Inner margin of gonocoxite between superior and inferior volsellae curved, strongly sclerotized. Gonostylus 52–55 µm long, with bluntly triangular basal crista dorsalis; megaseta 6–7 µm long. HR 2.30–2.33. HV 3.10

Distribution and biology. Two specimens were collected in a Malaise trap in a primary lowland Mata

Atlântica forest in São Paulo State, Brazil.

Figures

FIGURES 131–135. Pseudosmittia lamasi sp. n., male. 131—tentorium, stipes, and cibarial pump; 132—thorax; 133— wing; 134—hypopygium, dorsal aspect; 135—hypopygium with anal point and tergite IX removed, dorsal aspect to the left, ventral aspect to the right.