Labrundinia meta Roback 1987
Creators: name: Silva, Fabio Laurindo Da
name: Fonseca-Gessner, Alaide Aparecida
name: Ekrem, Torbjørn
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Labrundinia
Labrundinia meta

description: Labrundinia meta Roback, 1987
(Fig. 37)
Labrundinia meta Roback, 1987: 220 (description of male).
Material examined. Type material: Holotype male, Colombia: Departamento del Meta, Puerto López, Laguna Mozambique, 16 km s. w. of Puerto López, 25.ii.1972, N. R. Foster (ANSP).
Diagnostic characters. Labrundinia meta differs from other Labrundinia species by the combination of the following characters. Adult male: abdominal tergites I, VIII pale, T II, V with divided brown transverse band near proximal margin, T III–IV, VI–VII with continuous brown transverse band near proximal margin; hypopygium pale, sternapodeme with moderate anterior process.
Description. Adult male (n = 1)
Size. Total length 1.9 mm. Wing length 1.3 mm. Total length/wing length 1.53. Wing length/ profemur length 2.81.
Coloration. Head brown with dark brown occipital margin; pedicel and antenna brown; maxillary palp pale. Thorax brown with dark scutum; antepronotum pale. Wing membrane transparent without any marking. Legs pale brown. Femur I with apex brown, Fe II–III pale. Tibia I with apex and base brown, Ti II–III brown. Tarsomere 1 with apex brown, tarsomeres 2–5 pale brown to brown. Abdominal tergites I, VIII pale, T II, V with divided brown transverse band near proximal margin, T III–IV, VI–VII with continuous brown transverse band near proximal margin; hypopygium pale (Fig. 37L).
Head (Figs 37A–E). Temporal setae 11, uniserial (Fig. 37B). Eye ratio 1.16. Tentorium (Fig. 37C) 134 Μm long. Clypeus 108 Μm long, 78 Μm wide at largest part, bearing 23 setae. Cibarial pump 108 Μm long (Fig. 37D), with anterior margin concave. Lengths of palpomeres 1–5 (in Μm): 34; 55; 111; 145; 214. Antennal flagellum 427 Μm long, diameter of pedicel 59 Μm, apical setae single (Fig. 37E), AR 1.37.
Thorax. Antepronotum with 2 lateral setae. Acrostichals 40, biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 23, irregularly biserial; prealars 7; supraalars 2. Anapleural suture ratio 0.48. Scutellum with transverse row of 12 setae and group of numerous fine anterior setae.
Wing (Fig. 37F). Width 0.4 mm. Costa 1.0 mm long. R2+3 absent. VR 0.87. WW 0.32. Brachiolum with 2 setae. Squama setiferous.
Legs (Figs 37G–K). Fore leg: width at apex of tibia 47 Μm (Fig. 37G), tibia with single, apical and pectinate spur 16 Μm long (Fig. 37H), with three and two preapical setae; ta1 with two preapical pseudospurs. Mid leg: width at apex of tibia 39 Μm long (Fig. 37I), tibia with single, apical and pectinate spur 23 Μm long with three lateral teeth (Fig. 37J) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 47 Μm long (Fig. 37K), tibia without spur; comb with 7 bristles; ta1 with two preapical pseudospurs. Claws slender, hooked; pulvilli absent. Lengths and proportion of leg segments as in Table 24.
fe ti ta1 ta2 ta3 p1 455 461 281 219 125 p2 625 387 – – –
p3 531 585 578 281 180
ta4 ta5 LR BV SV p1 94 63 0.63 2.39 3.14 p2 – – – – –
p3 110 78 0.99 2.61 1.93 Hypopygium (Fig. 37M). Tergite IX arched, with 11 posterior setae. Membranous anal point trapezoidal, broad. Phallapodeme 65 Μm long. Sternapodeme with moderate anterior process. Gonocoxite cylindrical, 127 Μm long, 66 Μm wide. GcR 1.94. Gonostylus simple and slender, 77 Μm long; megaseta, 12 Μm long. HR 1.67. HV 2.49.
Adult female, pupa and larva. Unknown.
Remarks. Adult males of Labrundinia meta may be distinguished from those of the related species L. fosteri, L. nathani, L. panamensis and L. nicaguarensis by the divided transverse band on tergites II and V and the pale tergite VIII. Labrundinia meta has been recorded only from its type locality in Colombia. Only one adult was collected in the area of Laguna Mozambique, which is characterized by the presence of Scirpus cubensis and Pastalum repens along the shore and pH around 4.5. The larvae from this area described by Roback (1987a) could not with certainty be associated with the adults. Thus, the immatures of L. meta remain unknown.
description: Published as part of Silva, Fabio Laurindo Da, Fonseca-Gessner, Alaide Aparecida & Ekrem, Torbjørn, 2014, A taxonomic revision of genus Labrundinia Fittkau, 1962 (Diptera: Chironomidae: Tanypodinae), pp. 1-185 in Zootaxa 3769 (1) on pages 79-81, DOI: 10.11646/zootaxa.3769.1.1, http://zenodo.org/record/250728