Antillocladius itatiaia, Mendes, Humberto F., Andersen, Trond & Hagenlund, Linn K., 2011

Mendes, Humberto F., Andersen, Trond & Hagenlund, Linn K., 2011, New species and records of Antillocladius Saether and Litocladius Mendes, Andersen et Saether from Brazil and Costa Rica (Chironomidae: Orthocladiinae), Zootaxa 2915, pp. 39-51 : 44-46

Antillocladius itatiaia sp. n.

( Figs 6–11 )

Type material. Holotype male, BRAZIL: Rio de Janeiro State, Penedo, 22°24.652'S 44°33.217'W, 468 m a.s.l., 18– 19.xii.2009, light trap and net, H.F. Mendes ( MZUSP).

Etymology. Named after the type locality, Parque Nacional do Itatiaia . The name is to be regarded as a noun in apposition.

Diagnostic characters. The species can be separated from all other members of the genus by the following combination of characters: squama with setae, wing membrane bare, tapering anal point, virga composed of two spines, inferior volsella well set-off and composed of a single lobe and gonostylus comparatively short and broad.

Description. Male (n = 1). Total length 2.20 mm. Wing length 1.24 mm. Total length / wing length 1.77. Wing length / length of profemur 2.59.

Coloration. Amber to light brown, thorax with darker markings dorsally, legs uniformly light brown.

Head. AR 1.04. Ultimate flagellomere 385 µm long. Temporal setae 11 including 4 inner verticals, 1 outer vertical, and 6 postorbitals. Clypeus with 3 setae. Tentorium, stipes, and cibarial pump as in Figure 6 . Tentorium 81 µm long, 15 µm wide. Stipes 73 µm long. Palp segment lengths (in µm): 6, 36, 70, 64, 82. Third palpomere with 3 sensilla clavata subapically, longest 14 µm long.

Thorax ( Fig. 7 ). Antepronotum with 2 weak setae. Dorsocentrals 8; acrostichals 17, all very small and scalpellate, starting close to antepronotum; prealars 3; supraalar 1. Scutellum with 4 setae.

Wing ( Fig. 8 ). VR 1.37. Costal extension 23 µm long. Brachiolum with 1 seta, remaining veins and cells apparently bare (wing not fully dry). Squama with 7 setae.

Legs. Spur of fore tibia 40 µm long, spurs of mid tibia 20 µm and 16 µm long, spurs of hind tibia 37 µm and 18 µm long. Width at apex of fore tibia 29 µm, of mid tibia 25 µm, of hind tibia 34 µm. Comb with 13 setae, longest 24 µm, shortest 15 µm long. Lengths and proportions of legs as in Table 2.

fe ti ta1 ta2 ta3 ta4 ta5 LR BV SV BR p1 475 576 336 220 128 76 43 0.58 2.98 3.12 2.7 p2 486 506 223 126 85 47 36 0.44 4.14 4.43 4.5 p3 551 608 340 187 137 61 43 0.56 3.51 3.41 5.3 Hypopygium ( Figs 9–11 ). Tergite IX covered with microtrichia, laterosternite IX with 8 setae. Anal point triangular, 44 µm long, 20 µm wide at base, 4 µm wide at apex, with 19 setae. Phallapodeme 86 µm long, transverse sternapodeme 61 µm long. Virga 27 µm long. Gonocoxite 145 µm long. Gonostylus 57 µm long, megaseta 11 µm long. HR 2.56. HV 3.86.

Biology and distribution. See A. anandae sp. n. for details.

Figures

FIGURES 6 – 11. Antillocladius itatiaia sp. n., male. 6 — tentorium, stipes and cibarial pump; 7 — thorax; 8 — wing; 9 — hypopygium, dorsal aspect; 10 — hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right; 11 — gonostylus, dorsal aspect.