Compterosmittia berui, Humberto F. Mendes, Trond Andersen & Ole A. Saether, 2004

Humberto F. Mendes, Trond Andersen & Ole A. Saether, 2004, A review of Antillocladius Saether, 1981; Compterosmittia Saether, 1981 and Litocladius new genus (Chironomidae, Orthocladiinae), Zootaxa 594, pp. 1-82 : 64-66

Compterosmittia berui new species

( Fig. 18 A–E)

Type material: Holotype male, BRAZIL: São Paulo State, Salesópolis, Estação Biológica Boracéia, córrego Venerando, 12.xii.2001, light trap, C. Froehlich et al. ( MZUSP, slide mounted in Euparal). Paratypes: Santa Catarina State, Nova Teotônia, 27°11'S, 52°23'W, 1 male, xii.1970, F. Plaumann ( MZUSP); Santa Catarina State, São Bento do Sul, 26°19'25.6''S, 48°18'26.5''W, 4 males, 13–16.x.2001, Malaise trap, M.V. Yamada (1 UFS­ Car, 3 ZMBN).

Diagnostic characters: The male imago can be separated from other members of the genus by having wing membrane with 0–8 apical setae ; thin anal point tapering to point; inferior volsella with anterior knob­like projection and barely set off posterior extension; and megaseta not dentate.

Etymology: From the Indian language Tupy, beruì , meaning small midge; the name is a noun in apposition.

Male (n = 5).

Total length 1.64–1.86, 1.71 mm. Wing length 1.04–1.24, 1.13 mm. Total length / wing length 1.42–1.60, 1.50. Wing length / length of profemur 2.55–2.67, 2.60. Coloration brown, thorax dark brown, tarsi of all legs light brown.

Head. AR 0.69–0.78, 0.73; ultimate flagellomere 236–304, 271 µm. Temporal setae 6–9, 8 including 2–4, 3 inner verticals, 2–4, 3 outer verticals and 1–2, 1 postorbitals. Clypeus with 6–11, 8 setae . Tentorium, stipes and cibarial pump as in Fig. 18 A; tentorium 103–110, 106 µm long, 7–8, 8 µm wide at sieve pore; stipes 69–76, 73 µm long. Palpomere lengths in µm: 14–15, 14; 23–25, 24; 50–54, 52; 44–55 (3); 47–55 (3); 75–80 (3). Third palpomere with 2–4, 3 sensilla clavata subapically; longest 13–14, 14 µm long.

Thorax ( Fig. 18 B). Antepronotum with 2–3, 3 setae . Dorsocentrals 5–6, 5; acrostichals 6–7, 6, all scalpellate starting at one third from antepronotum; prealars 2. Scutellum with 4 setae .

Wing ( Fig. 18 C). VR 1.48–1.56, 1.53. Costal extension 103–134, 115 µm long. Brachiolum with 1 seta, other veins bare; cell r4+5 with 0–8, 4 setae , other cells bare. Squama bare.

Legs. Spur of front tibia 25–30 (3) µm long, spurs of middle tibia 25–32, 27 µm and 16–21, 19 µm long; of hind tibia 29–37, 34 µm and 17–21, 19 µm long. Width at apex of front tibia 22–26, 23 µm; of middle tibia 22–25, 24 µm; of hind tibia 25–29, 27 µm. Hind tibial comb with 5–6 (3) setae , shortest seta 11–17 (3) µm long, longest seta 22–26 (3) µm long. Lengths (in µm) and proportions of legs as in Table 14 .

Hypopygium ( Fig. 18 D–E). Anal point 41–44, 42 µm long; 32–37, 35 µm wide at base; with 7–12, 10 strong lateral setae , void of microtrichia except at base. Laterosternite IX with 4 setae . Phallapodeme 43–62, 52 µm long. Transverse sternapodeme nearly straight; 50–62, 58 µm long. Virga absent. Gonocoxite 100–153, 124 µm long; with long, low inferior volsella, with rounded projection orally. Gonostylus 62–76, 68 µm long; megaseta 5–8, 7 µm long. HR 1.60–1.95, 1.81; HV 2.16–2.67, 2.38.

Figures

FIGURE 18. Compterosmittia berui new species, male imago. A – cibarial pump, tentorium and stipes; B – thorax; C – wing; D – anal point and tergite IX and dorsal aspect of left gonocoxite and gonostylus; E – hypopygium with anal point and tergite IX removed, left dorsal aspect, right ventral aspect.

Tables

TABLE 14. Lengths (in µm) and proportions of legs of Compterosmittia berui new species, (n = 1 – 3).

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR	BV	SV	BR
p1	388–440	436–472	408 412	192–216	96–108	48–60	36–44	0.87–0.94	3.09–3.31	2.02–2.21	3.1–3.3
p2	460	400	248	108	60	36	28	0.62	4.78	3.47	3.5
p3	448–488	452–480	220–284	104–124	80–104	40–44	28–32	0.50–0.61	3.91–4.54	3.31–3.41	4.5–4.8