Labrundinia panamensis 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 : 99-101

Labrundinia panamensis Silva sp. n.

( Fig. 47 )

Material examined. Type material: Holotype male, Panama: Barro Colorado, Barro Colorado Island, 10.iii.1986, H. Malicky ( ZSM).

Etymology. The name refers to the country where the holotype has been collected, Panama.

Diagnostic characters. Labrundinia panamensis sp. n. differs from other Labrundinia species by the combination of the following characters. Adult male: R2+3 present; abdominal tergite II with divided transverse band near proximal margin, T III–VI with continuous transverse band near proximal margin, T VII–VIII almost completely brown; hypopygium brown, sternapodeme with reduced anterior process.

Description. Adult male (n = 1)

Size. Total length 1.9 mm. Wing length 1.0 mm. Total length/wing length 2.01. Wing length/ profemur length 2.32.

Coloration. Head pale brown with dark brown occipital margin; pedicel and antenna brown; maxillary palp pale brown. Thorax brown with dark scutum; antepronotum pale brown. Wing membrane transparent without any marking. Legs pale brown. Abdominal tergite II with divided transverse band near proximal margin, T III–VI with continuous transverse band near proximal margin, VII–VIII almost completely brown; hypopygium brown ( Fig. 47L ).

Head ( Figs 47A–E ). Temporal setae 10, uniserial ( Fig. 47B ). Eye ratio 0.86. Tentorium ( Fig. 47C ) 155 Μm long. Clypeus 67 Μm long, 71 Μm wide at largest part, bearing 18 setae. Cibarial pump 148 Μm long ( Fig. 47D ), with anterior margin concave. Lengths of palpomeres 1–5 (in Μm): 33; 44; 98; 104; 195. Antennal flagellum 590 Μm long, diameter of pedicel 99 Μm, apical setae single ( Fig. 47E ), AR 1.06.

Thorax. Antepronotum with 3 lateral setae. Acrostichals 40, biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 26, irregularly biserial; prealars 9; supraalars 3. Anapleural suture ratio 0.44. Scutellum with transverse row of 8 setae and group of numerous fine anterior setae.

Wing ( Fig. 47F ). Width 0.3 mm. Costa 0.8 mm long. R2+3 present. VR 0.76. WW 0.30. Brachiolum with 2 setae. Squama setiferous.

Legs ( Figs 47G–K ). Fore leg: width at apex of tibia 40 Μm ( Fig. 47G ), tibia with single, apical and pectinate spur 16 Μm long ( Fig. 47H ), with three lateral teeth and two preapical setae; preapical pseudospurs not observed. Mid leg: width at apex of tibia 36 Μm long ( Fig. 47I ), tibia with single, apical and pectinate spur 18 Μm long with three lateral teeth ( Fig. 47J ) and two preapical setae; preapical pseudospurs not observed. Hind leg: width at apex of tibia 39 Μm long ( Fig. 47K ), tibia without spur; comb with 4 bristles; preapical pseudospurs not observed. Pulvilli absent. Lengths and proportion of leg segments as in Table 31.

Hypopygium ( Fig. 47M ). Tergite IX arched, with 10 posterior setae. Membranous anal point triangular, apical edge slightly rounded. Phallapodeme 54 Μm long. Sternapodeme with reduced anterior process. Gonocoxite cylindrical, 97 Μm long, 45 Μm wide, with slightly concave inner margin. GcR 2.13. Gonostylus simple and slender, 58 Μm long; megaseta 11 Μm long. HR 1.67. HV 3.35.

Adult female, pupa and larva. Unknown.

Remarks. Adult males of Labrundinia panamensis are very similar to those of L. nicaraguensis . See remarks under L. nicaraguensis . Labrundinia panamensis has been recorded only from its type locality in Panama. The immature stages and their habitat remain unknown.

fe ti ta1 ta2 ta3 p1 417 439 – – – p2 503 404 – – – p3 446 543 – – –

ta4 ta5 LR BV SV p1 – – – – – p2 – – – – – p3 – – – – –

Figures

FIGURES 47 A – M. Labrundinia panamensis 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.