Litocladius confusus, 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 : 57

Litocladius confusus sp. n.

( Figs 79–83 )

Type material: Holotype male, BRAZIL: Rio de Janeiro: Nova Iguaçu, Reserva Biológica Tinguá , 22°34'34''S 43°26'05''W, 5–8.iii.2002, Malaise trap (Trilha-2), S.T.P. Amarante et al. ( BIOTA-FAPESP) ( MZUSP).

Diagnostic characters: The species can be separated from the two other members of the genus by the absence of spines on the third palpomere, wing cells and veins bare, the shape of the lateral lamellae of the virga, and the low inferior volsella.

Etymology: From Latin confusio, meaning confusion, as it superficially looks like an Antillocladius .

Male (n = 1). Total length 2.16 mm. Wing length 1.24 mm. Total length / wing length 1.73. Wing length / length of profemur 2.67. Coloration dark brown, thorax dark brown without distinct marks.

Head. AR 1.28. Ultimate flagellomere 446 µm long. Temporal setae 9, including 4 inner verticals, 3 outer verticals, and 2 postorbitals. Clypeus with 3 setae. Tentorium, stipes, and cibarial pump as in Figure 79 . Tentorium 107 µm long, 20 µm wide. Stipes 104 µm long, 45 µm wide. Palp segment lengths (in µm): 18, 48, 68, 59, 82. Third palpomere with 3 sensilla clavata subapically, longest 14 µm long.

Thorax ( Fig. 80 ). Antepronotum with 2 setae. Dorsocentrals 8; acrostichals composed of at least 4 anterior strong decumbent setae, 2 weak simple, and 5 posterior scalpellate setae; prealars 3; supraalar 1. Scutellum with 4 setae.

Wing ( Fig. 81 ). VR 1.37. C extension 36 µm long. Brachiolum with 1 seta, veins and cells bare. Squama with 11 setae.

Legs. Spur of foretibia 43 µm long, spurs of midtibia 23 µm and 15 µm long, spurs of hind tibia 39 µm and 15 µm long. Width at apex of foretibia 27 µm, of midtibia 25 µm, of hind tibia 29 µm. Comb with 13 setae, longest 27 µm, shortest 11 µm long. Lengths and proportions of legs as in Table 13.

Hypopygium ( Figs 82–83 ). Tergite IX covered with strong microtrichia, laterosternite IX with 6–7 setae. Anal point narrowly triangular, 59 µm long, 38 µm wide at base, 3 µm wide at apex, with 22 setae. Phallapodeme 75 µm long, transverse sternapodeme 73 µm long. Virga 39 µm long. Gonocoxite 134 µm long. Gonostylus 64 µm long, megaseta 7 µm long. HR 2.11, HV 3.38.

Distribution: This species is known only from the type locality in Rio de Janeiro State, Brazil, where it was collected in a Malaise trap.

Figures

FIGURES 79–83. Litocladius confusus sp. n., male. 79—tentorium, stipes, and cibarial pump; 80—thorax; 81—wing; 82—anal point and tergite IX and dorsal aspect of left gonocoxite and gonostylus; 83—hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right.