Antillocladius anandae, 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 : 41-43

Antillocladius anandae sp. n.

( Figs 1–5 )

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 Ananda Ballarini, the owner of the land where the specimen was collected, for her kindness and permission to collect.

Diagnostic characters. The species resembles A. venequatoriensis in the shape of the inferior volsella. However, it can be separated from A. venequatoriensis and all other members of the genus by the combination of the following characters: bare wing membrane, long costal extension and long virga.

Description. Male (n = 1). Total length 1.84 mm. Wing length 1.01 mm. Total length / wing length 1.81. Wing length / length of profemur 2.39.

Coloration. Amber to light brown, thorax with darker markings on preepisternum, median anepisternum, and notum; legs uniformly light brown.

Head. AR 0.55. Ultimate flagellomere 216 µm long. Temporal setae 8 including 3 inner verticals, 1 outer vertical, and 4 postorbitals. Clypeus with 5 setae. Tentorium, stipes, and cibarial pump as in Figure 1 . Tentorium 86 µm long, 18 µm wide. Stipes 73 µm long. Palp segment lengths (in µm): 18, 25, 54, 59, 73. Third palpomere with 4 sensilla clavata subapically, longest 9 µm long.

Thorax ( Fig. 2 ). Antepronotum with 2 strong setae. Dorsocentrals 7; acrostichals 13 starting close to antepronotum, all scalpellate; prealars 3; no supraalar. Scutellum with 6 setae, uniserial.

Wing ( Fig. 3 ). VR 1.41. Costal extension 63 µm long. Brachiolum with 1 seta, remaining cells and veins bare. Squama with 3 setae.

Legs. Spur of fore tibia 34 µm long, spurs of mid tibia 23 µm and 15 µm long, spurs of hind tibia 31 µm and 14 µm long. Width at apex of fore tibia 25 µm, of mid tibia 24 µm, of hind tibia 32 µm. Comb with 8 setae, longest 20 µm, shortest 16 µm long. Lengths and proportions of legs as in Table 1.

fe ti ta1 ta2 ta3 ta4 ta5 LR BV SV BR p1 425 493 334 191 114 67 37 0.68 3.07 2.27 2.9 p2 439 450 185 104 70 43 36 0.41 4.23 4.80 3.1 p3 495 540 319 166 128 50 40 0.59 3.53 3.25 3.4 Hypopygium ( Figs 4–5 ). Tergite IX covered with microtrichia, laterosternite IX with 5 setae. Anal point triangular, 38 µm long, 15 µm wide at base, 2 µm wide at apex, with 10 setae. Phallapodeme 73 µm long, transverse sternapodeme 64 µm long. Virga 43 µm long. Gonocoxite 127 µm long. Gonostylus 62 µm long, megaseta 7 µm long. HR 2.04. HV 2.97.

Biology and distribution. The species was collected close to Parque Nacional do Itatiaia and is thus likely to occur in the park itself too. The area surrounding the park is mostly covered with secondary forests that have been left undisturbed for the past 50 years. The material was, however, collected in an area with cabins surrounded by gardens planted with mainly native species. The soil was very humid and covered with grass, sedges and mosses and the few remaining trees were completely covered by epiphytes and mosses.

In addition to the new species, Antillocladius brazuca , A. folius and A. musci have been taken in Parque Nacional do Itatiaia and its vicinity.

Figures

FIGURES 1 – 5. Antillocladius anandae sp. n., male. 1 — tentorium, stipes and cibarial pump; 2 — thorax; 3 — wing; 4 — hypopygium, dorsal aspect; 5 — hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right.