Antillocladius plicatus, Mendes & Andersen, 2008

Mendes, Humberto Fonseca & Andersen, Trond, 2008, A review of Antillocladius Saether and Litocladius Mendes, Andersen et Saether, with the description of two new Neotropical genera (Diptera, Chironomidae, Orthocladiinae), Zootaxa 1887 (1), pp. 1-75 : 34-36

Antillocladius plicatus sp. n.

( Figs 33–37 )

Type material: Holotype male, BRAZIL: Bahia: Porto Seguro, Estação Ecológica Pau Brasil , 16°23'17.6''S, 39°10'55.6''W, 17.v. 2002, 107 m a.s.l., Malaise trap (Trilha-1) C.O. Azevedo et al. ( BIOTA-FAPESP) ( MZUSP) . Paratypes: 4 males, same data as holotype ( MZUSP, ZMBN) .

Diagnostic characters: The species can be separated from all other members of the genus by the short virga apparently attached to the penis cavity and the long inferior volsella with median, oblique fold.

Etymology: From Latin, plicatus , meaning fold; referring to the shape of the inferior volsella.

Male (n = 5, except when otherwise stated). Total length 1.43–1.80, 165 mm. Wing length 0.91–1.03, 1.00 mm. Total length / wing length 1.42–1.76, 1.65. Wing length / length of profemur 2.47–2.68, 2.53. Coloration dark brown, thorax brown without distinct marks.

Head. AR 1.10–1.25, 1.20. Ultimate flagellomere 310–360, 341 µm long. Temporal setae 7–9, 8; including 3–4, 3 inner verticals; 3–4, 3 outer verticals; and 2 postorbitals. Clypeus with 4–6, 5 setae. Tentorium, stipes, and cibarial pump as in Figure 33 . Tentorium 79–84, 82 µm long; 15–18, 16 µm wide. Stipes 79–93, 87 µm long; 27 (1) µm wide. Palp segment lengths (in µm): 13–16, 14; 34–36, 35; 61–75, 68; 57–75, 66; 75–107, 90. Third palpomere with 2–4, 3 sensilla clavata subapically, longest 11–14, 13 µm long.

Thorax ( Fig. 34 ). Antepronotum with 2–3, 3 setae. Dorsocentrals 5–7, 6; acrostichals in mid scutum, composed of 2–4, 3 simple anterior and 7–17, 12 scalpellate posterior setae, irregularly biserial; prealars 2–3, 3; supraalar 1. Scutellum with 4 setae.

Wing ( Fig. 35 ). VR 1.33–1.48, 1.39. C extension 23–36, 29 µm long. Brachiolum with 1 seta; R with 0–1, 0 seta; other veins and cells bare. Squama with 5–6, 6 setae.

Legs. Spur of foretibia 34–41, 38 µm long; spurs of midtibia 18–23, 20 µm and 18–20, 19 µm long; spurs of hind tibia 34–43, 38 µm and 16–23, 19 µm long. Width at apex of foretibia 24–27, 25 µm; of midtibia 23– 27, 24 µm; of hind tibia 27–29, 28 µm. Comb with 12–13, 13 setae; longest 25–32, 29 µm; shortest 16–18, 17 µm. Lengths and proportions of legs as in Table 6.

Hypopygium ( Figs 36–37 ). Tergite IX covered with microtrichia; laterosternite IX with 4–8, 6 setae. Anal point narrowly triangular; 32–45, 38 µm long; 23–29, 24 µm wide at base; 1–3, 2 µm wide at apex; with 9–15, 12 setae. Phallapodeme 50–64, 59 µm long; transverse sternapodeme arcuate, 50–57, 54 µm long, oral projections barely indicated. Virga 7–10, 9 µm long. Gonocoxite 123–152, 134 µm long. Gonostylus 59–66, 62 µm long; megaseta 4–6, 5 µm long. HR 2.07–2.31, 2.15; HV 2.34–2.94, 2.65.

Distribution: The species is known from Bahia State, Brazil.

Figures

FIGURES 33–37. Antillocladius plicatus sp. n., male. 33—tentorium, stipes, and cibarial pump; 34—thorax; 35—wing; 36—anal point and tergite IX and dorsal aspect of left gonocoxite and gonostylus; 37—hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right.