Antillocladius biota, 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 : 30-32

Antillocladius biota new species

( Fig. 3 A–F)

Type material: Holotype male, BRAZIL: São Paulo State, Parque Estadual Intervales, sede de pesquisa, 16.viii.2000, larvae taken on tree trunks, H.F. Mendes ( MZUSP, slide mounted in Euparal). Paratypes: 2 males, as holotype ( ZMBN).

Diagnostic characters: The male imago can be separated from other members of the genus by having bare wing membrane; squama with a few setae ; long costal extension; scalpellate acrostichals starting near antepronotum; long virga ; nearly parallel­sided anal point with blunt apex and weak lateral setae ; and inferior volsella short and pointed triangular.

Etymology: Named after the Biota program supported by FAPESP; the name is a noun in apposition.

Male (n = 1–3).

Total length 1.91–2.12 mm. Wing length 1.19–1.25 mm. Total length / wing length 1.60–1.74. Wing length / length of profemur 2.45–2.54. Coloration brown, thorax dark brown, tarsi of all legs light brown.

Head. AR 0.60–0.61, ultimate flagellomere 241–294 µm. Temporal setae 8, including 2–3 inner verticals, 1–2 outer verticals and 3–4 postorbitals. Clypeus with 6–7 setae . Tentorium, stipes and cibarial pump as in Fig. 3 A; tentorium 126–131 µm long, 10 µm wide at sieve pore; stipes 88 µm long. Palpomere lengths in µm: 18–25, 30–38, 56–63, 71–76, 101–103. Third palpomere with 3–5 sensilla clavata subapically, longest 13 µm long.

Thorax ( Fig. 3 B). Antepronotum with 1–3 setae . Dorsocentrals 8–11; acrostichals 11– 12, all scalpellate starting close to antepronotum; prealars 2–3. Scutellum with 6 setae .

Wing ( Fig. 3 C). VR 1.38–1.64. Costal extension 76–88 µm long. Brachiolum with 1 seta, R with 0–3 setae , R1 with 0–1 seta, other veins bare. Wing membrane bare. Squama with 3–6 setae .

Legs. Spur of front tibia 38–50 µm long, spurs of middle tibia 17–20 µm and 25–33 µm long, of hind tibia 17–20 µm and 43–51 µm long. Width at apex of front tibia 28–33 µm, of middle tibia 28–30 µm, of hind tibia 33–38 µm. Hind tibial comb with 9–11 setae , shortest seta 13–18 µm long, longest seta 28–33 µm long. Lengths (in µm) and proportions of legs as in Table 3 .

Hypopygium ( Fig. 3 D–F). Anal point 56–58 µm long; 20–25 µm wide at base, with 13–14 strong lateral setae , void of microtrichia except at base. Laterosternite IX with 7–8 setae . Phallapodeme 68–70 µm long. Transverse sternapodeme slightly arcuate; with rounded oral projections, 63–76 µm long. Virga 58 µm long. Gonocoxite 119–134 µm long; with long, low inferior volsella, with rounded projection orally. Gonostylus 76–81 µm long; megaseta 13–15 µm long. HR 1.57–1.77, HV 2.51–2.79.

Figures

FIGURE 3. Antillocladius biota 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 3. Lengths (in µm) and proportions of legs of Antillocladius biota new species.

	fe	ti	ta1	ta2	ta3	ta4	ta5	LR	BV	SV	BR
p1	468–497	517–604	390–420	224–234	127–136	78	49–58	0.69–0.77	2.78–3.18	2.46–4.65	2.5–2.7
p2	497–525	525–556	205–224	107–175	78–88	39–58	29–39	0.39–0.43	3.59–4.85	4.61–5.04	2.4–2.5
p3	546–575	595–643	341	175–205	136–156	68	49–58	0.53–0.57	3.26–3.47	3.34–3.57	3.0–3.5