Labrundinia kogilamae Silva

Silva, Fabio Laurindo Da, Fonseca-Gessner, Alaide Aparecida & Ekrem, Torbjørn, 2014, A taxonomic revision of genus Labrundinia Fittkau, 1962 (Diptera: Chironomidae: Tanypodinae), Zootaxa 3769 (1), pp. 1-185 : 65-67

Labrundinia kogilamae Silva sp. n.

( Fig. 30 )

Material examined. Type material: Holotype male, Brazil: São Paulo, São Carlos, Monjolinho stream, associated with the aquatic macrophyte, Myriophyllum aquaticum , 12.iii.2008, F. L. Silva ( MZUSP). Paratype: 1 male same data as holotype ( NTNU).

Etymology. Named in honour of Kogilam Maistry from Cape Town, in recognition for her friendship, kindness and continuous support.

Diagnostic characters. Labrundinia kogilamae sp. n. differs from other Labrundinia species by the combination of the following characters. Adult male: wing length 1.32–1.45 mm; R2+3 absent; abdominal tergites II–VI with continuous brown transverse band near proximal margin, T VII–VIII completely brown; hypopygium brown, sternapodeme with distinct anterior process.

Description. Adult male (n = 2 unless otherwise stated)

Size. Total length 2.5–2.6 mm. Wing length 1.3–1.5 mm. Total length/wing length 1.86–1.88. Wing length/ profemur length 2.93–3.18.

Coloration. Head pale brown with dark brown occipital margin; pedicel, antenna and maxillary palp pale brown. Thorax completely brown. Wing membrane transparent without any marking. Legs brown. Abdominal tergites II–VI with continuous brown transverse band near proximal margin, T VII–VIII completely brown; hypopygium brown ( Fig. 30L ).

Head ( Figs 30A–E ). Temporal setae 14, uniserial ( Fig. 30B ). Eye ratio 0.71–0.74. Tentorium ( Fig. 30C ) 162– 181 Μm long. Clypeus 106 Μm long, 70 Μm wide at largest part, bearing 21 setae. Cibarial pump 204 Μm long ( Fig. 30D ), with anterior margin concave. Lengths of palpomeres 1–4 (in Μm): 25 (1); 55 (1); 117 (1); 143 (1); palpomeres 5 broken off. Antennal flagellum 738 (1) Μm long, diameter of pedicel 117 (1) Μm, apical setae single ( Fig. 30E ), AR 1.22 (1).

Thorax. Antepronotum with 2 lateral setae. Acrostichals 44–48, biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 22–24, irregularly biserial; prealars 9; supraalars 2. Anapleural suture ratio 0.48–0.55. Scutellum with transverse row of 8 setae and group of numerous fine anterior setae.

Wing ( Fig. 30F ). Width 0.3–0.4 mm. Costa 1.2–1.3 mm long. R2+3 absent. VR 0.74–0.76. WW 0.26–0.27. Brachiolum with 2 setae. Squama setiferous.

Legs ( Figs 30G–K ). Fore leg: width at apex of tibia 34–48 Μm ( Fig. 30G ), tibia with single, apical and pectinate spur 19–22 Μm long ( Fig. 30H ), with three lateral teeth and two preapical setae; ta1-4 each with two preapical pseudospurs. Mid leg: width at apex of tibia 30–36 Μm long ( Fig. 30I ), tibia with single, apical and pectinate spur 22–34 Μm long with three lateral teeth ( Fig. 30J ) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 34–45 Μm long ( Fig. 30K ), tibia without spur; comb with 5 bristles; ta1-4 without any preapical pseudospurs. Claws slender, hooked; pulvilli absent. Lengths and proportion of leg segments as in Table 19.

fe ti ta1 ta2 ta3

p1 451–456 488–522 410–448 222–256 166–198 p2 501–560 669–682 672–717 264–304 171–200 p3 474–515 637–682 677–715 280–294 191–205

ta4 ta5 LR BV SV

p1 128–143 76–77 0.84–0.86 2.12–2.27 2.93–3.18 p2 109–130 81–91 1.00 –1.05 2.65–2.99 1.65–1.83 p3 131–138 74–88 1.05–1.06 2.62–2.66 1.64–1.67 Hypopygium ( Fig. 30M ). Tergite IX arched, with 12 posterior setae. Membranous anal point broad, apical edge convex. Phallapodeme 45–46 Μm long. Sternapodeme with distinct anterior process. Gonocoxite cylindrical, 111– 112 Μm long, 48–51 Μm wide, with slightly concave inner margin. GcR 2.28–2.34. Gonostylus simple and slender, 69 Μm long; megaseta 12 Μm long. HR 1.60–1.61. HV 3.58–3.68.

Adult female, pupa and larva. Unknown.

Remarks. Adult males of Labrundinia kogilamae appear most similar to those of L. tenata in the abdominal coloration. However, the sternapodeme with distinct anterior process, forming an acute angle apically separates L. kogilamae from L. tenata that has an apically rounded sternapodeme without anterior process. Labrundinia kogilamae has been recorded only from its type locality in São Paulo State, Brazil. The adults emerged from the aquatic macrophyte Myriophyllum aquaticum placed in a plastic tray and kept in laboratory. Thus, this is a likely habitat for the unknown immature stages.

Figures

FIGURES 30 A – M. Labrundinia kogilamae Silva sp. n., adult male. A. Head, frontal view. B. Temporal setae. C. Tentorium. D. Cibarial pump. E. Apex of antenna. F. Wing. G. Apex of fore tibia. H. Fore tibial spur. I. Apex of mid tibia. J. Mid tibial spur. K. Apex of hind tibia with comb. L. Abdominal coloration pattern, dorsal aspect. M. Hypopygium, left: ventral aspect, right: dorsal aspect.