Labrundinia meta Roback, 1987

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 : 79-81

publication ID	https://doi.org/ 10.11646/zootaxa.3769.1.1
publication LSID	lsid:zoobank.org:pub:705567C6-C912-4A19-9DE2-726254E17076
DOI	https://doi.org/10.5281/zenodo.5621061
persistent identifier	https://treatment.plazi.org/id/676987A8-B74C-FF81-FF29-FB02FB52F9D9
treatment provided by	Plazi
scientific name	Labrundinia meta Roback, 1987
status

Treatment

Labrundinia meta Roback, 1987 View in CoL

( Fig. 37 View FIGURES 37 A – M )

Labrundinia meta Roback, 1987: 220 View in CoL (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 View FIGURES 37 A – M ).

Head ( Figs 37A–E View FIGURES 37 A – M ). Temporal setae 11, uniserial ( Fig. 37B View FIGURES 37 A – M ). Eye ratio 1.16. Tentorium ( Fig. 37C View FIGURES 37 A – M ) 134 Μm long. Clypeus 108 Μm long, 78 Μm wide at largest part, bearing 23 setae. Cibarial pump 108 Μm long ( Fig. 37D View FIGURES 37 A – M ), 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 View FIGURES 37 A – M ), 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 View FIGURES 37 A – M ). 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 View FIGURES 37 A – M ). Fore leg: width at apex of tibia 47 Μm ( Fig. 37G View FIGURES 37 A – M ), tibia with single, apical and pectinate spur 16 Μm long ( Fig. 37H View FIGURES 37 A – M ), with three and two preapical setae; ta1 with two preapical pseudospurs. Mid leg: width at apex of tibia 39 Μm long ( Fig. 37I View FIGURES 37 A – M ), tibia with single, apical and pectinate spur 23 Μm long with three lateral teeth ( Fig. 37J View FIGURES 37 A – M ) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 47 Μm long ( Fig. 37K View FIGURES 37 A – M ), 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 View FIGURES 37 A – M ). 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.