Antillocladius venequatoriensis, 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 : 54-57

Antillocladius venequatoriensis new species

( Fig. 15 A–F)

Type material: Holotype male, VENEZUELA: Aragua, Parque Nacional Henri Pittier, Rancho Grande, 10°21.047'N, 67°41.198'W, 16–18.ix.1999, about 1000 m a.s.l., sweep net & light trap, T. Andersen ( MIZA, slide mounted in Canada balsam). Paratypes: 2 males, as holotype ( ZMBN); Aragua, Parque Nacional Henri Pittier, Curva Regressiva on road to Choroni, 5 males, 23.ix.1999, 1200 m a.s.l., light trap, T. Andersen ( ZMBN). ECUADOR: Provincia Pichincha, Setor Palmeras, unión Rios Guajalito y Bricador, Bosque Protector Rio Guajalito 0 0 14.925'N, 78 48.193'W, 1 male, 4–10.ii.2000, 1900 m a.s.l., light trap. F.M. Quesada ( ZMBN).

Diagnostic characters: The male imago can be separated from other members of the genus by having numerous setae in apical half of wing membrane; setose squama; costa weakly extended; acrostichals starting in front, all scalpellate; long virga ; anal point long, nearly triangular with pointed apex and moderately strong lateral setae ; and inferior volsella relatively small and rounded.

Etymology: The name refers to the countries where the species has been taken, Venezuela and Ecuador.

Male (n = 6).

Total length 2.01–2.21, 2.15 mm. Wing length 1.23–1.44, 1.36 mm. Total length / wing length 1.54–1.63, 1.57. Wing length / length of profemur 2.30–2.42, 2.37. Coloration brown, thorax dark brown, tarsi of all legs light brown.

Head. AR 0.98–1.05, 1.01; ultimate flagellomere 526–572, 557 µm long. Temporal setae 8–11, 9; including 2–5, 3 inner verticals; 2 outer verticals and 3–4, 4 postorbitals. Clypeus with 10 setae . Tentorium, stipes and cibarial pump as in Fig. 15 A; tentorium 125– 139, 131 µm long, 8–11, 9 µm wide at sieve pore; stipes 120–126, 122 µm long; 32–40, 36 µm wide. Palpomere lengths in µm: 22–25, 23; 35–38, 37; 90–96, 93; 85–97, 93 (4); 120– 135, 129 (4). Third palpomere with 3–4 sensilla clavata subapically; longest 10–15, 13 µm long.

Thorax ( Fig. 15 B). Antepronotum with 2–3, 3 setae . Dorsocentrals 9–17, 13; acrostichals 9–14, 12, all scalpellate starting close to antepronotum; prealars 4–6, 5. Scutellum with 7–10, 8 setae .

Wing ( Fig. 15 C). VR 1.37–1.61, 1.48. Costal extension 40–68, 54 µm long. Brachiolum with 1 seta; R with 11–15, 13 setae ; R1 with 11–14, 13; R4+5 with 20–27, 23; M with 4–7, 6; M1+2 with 40–56, 46; M3+4 with 16–26, 21; Cu1 with 9–12, 10; and An with 10–15, 12 setae . Wing membrane with 122–163, 149 setae in cell r4+5; 81–94, 87 setae in m1+2; 39–43, 41 setae in m3+4; and 15–25, 21 in cu and an together. Squama with 5–7, 6 setae .

Legs. Spur of front tibia 45–52, 50 µm long; spurs of middle tibia 30–33, 31 µm and 29–33, 30 µm long; spurs of hind tibia 28 µm and 47–54, 51 µm long. Width at apex of front tibia 35 µm; of middle tibia 30–33, 32 µm; of hind tibia 38–40, 39 µm. Hind tibial comb with 12 setae ; shortest seta 18–25, 21 µm long; longest seta 27–38, 33 µm long. Lengths (in µm) and proportions of legs as in Table 11 .

Hypopygium ( Fig. 15 D–F). Anal point 58–63, 61 µm long; 40–44, 42 µm wide at base; with 15–27, 24 strong lateral setae ; void of microtrichia except at base. Laterosternite IX with 3–6, 5 setae . Phallapodeme 83–97, 88 µm long. Transverse sternapodeme arcuate, with rounded oral projections; 96–113, 104 µm long. Virga 58–61, 59 µm long. Gonocoxite 163–168, 165 µm long; with long, low inferior volsella. Gonostylus 94–123, 101 µm long; megaseta 7–10, 8 µm long. HR 1.37–1.73, 1.62; HV 1.86–2.27, 2.15.

Figures

FIGURE 15. Antillocladius venequatoriensis 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; E – hypopygium with anal point and tergite IX removed, left dorsal aspect, right ventral aspect; F – gonostylus.

Tables

TABLE 11. Lengths (in µm) and proportions of legs of Antillocladius venequatoriensis new species.

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR	BV	SV	BR
p1	526– 600, 564	568– 668, 624	508– 572, 539	260– 272, 269	166– 184, 177	60–112, 107	39– 56, 41	0.86– 0.91, 0.87	2.62– 2.91, 2.87	2.16– 2.22, 2.18	2.9–3.9, 3.3
p2	540– 644, 565	532– 636, 556	260– 300, 273	132– 156, 136	104– 125, 120	49–92, 87	40– 52, 48	0.47– 0.53, 0.51	3.95– 4.27, 4.07	3.96– 4.12, 4.05	3.4–4.3, 3.8
p3	624– 664, 645	673– 744, 683	388– 416, 390	212– 234, 224	156– 172, 161	78–92, 81	39– 56, 47	0.56– 0.58, 0.57	3.32– 3.35, 3.34	3.38– 3.42, 3.39	4.0–4.7, 4.4