Labrundinia fosteri 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 : 44-45

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.5621043
persistent identifier	https://treatment.plazi.org/id/676987A8-B729-FFFD-FF29-F9E4FCC3F871
treatment provided by	Plazi
scientific name	Labrundinia fosteri Roback, 1987
status

Treatment

Labrundinia fosteri Roback, 1987 View in CoL

( Fig. 19 View FIGURES 19 A – M )

Labrundinia fosteri Roback 1987: 218 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). Paratype: 1 male same data as holotype ( ANSP).

Diagnostic characters. Labrundinia fosteri differs from other Labrundinia species by the combination of the following characters. Adult male: abdominal tergites II–IV with divided brown transverse band near proximal margin; T V with continuous brown transverse band, T VI–VIII completely brown; hypopygium without apical 0.50 brown, sternapodeme with anterior process.

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

Size. Total length 2.1 (1) mm. Wing length 1. 2mm. Total length/wing length 1.79 (1). Wing length/ profemur length 2.61 (1).

Coloration. Head dark brown with brown occipital margin; pedicel and antenna brown; maxillary palp pale. Thorax brown with scutum dorsally light brown; antepronotum pale; supraalar callus pale brown. Wing membrane transparent with two bands present formed mostly by dark hairs. Legs pale with apex brown. Tibias basally brown. Abdominal tergites II–IV with divided brown transverse band near proximal margin; T V with continuous brown transverse band, T VI–VIII completely brown; hypopygium with apical 0.50 brown ( Fig. 19L View FIGURES 19 A – M ).

Head ( Figs 19A–E View FIGURES 19 A – M ). Temporal setae 10, uniserial ( Fig. 19B View FIGURES 19 A – M ). Eye ratio 1.04–1.33. Tentorium ( Fig. 19C View FIGURES 19 A – M ) 104– 108 Μm long. Clypeus 125–141 Μm long, 90 Μm wide at largest part, bearing 16–19 setae. Cibarial pump, 157–182 Μm long ( Fig. 19D View FIGURES 19 A – M ), with anterior margin concave. Lengths of palpomeres 1–2 (in Μm): 49; 102; palpomeres 3, 4 and 5 broken off. Antennal flagellum 700 Μm long, diameter of pedicel 107 (1) Μm, apical setae single ( Fig. 19E View FIGURES 19 A – M ), AR 1.35 (1).

Thorax. Antepronotum lateral setae not observed. Acrostichals 44 (1), biserial, diverging evenly posteriorly starting close to antepronotum and almost reaching scutellum; dorsocentrals 20–21, irregularly uniserial; prealars 5–7; supraalars 2. Anapleural suture ratio 0.47. Scutellum with transverse row of 9–10 setae and group of numerous fine anterior setae.

Wing ( Fig. 19F View FIGURES 19 A – M ). Width 0.4 mm. Costa 1.0 mm long. R2+3 absent. VR 0.70–0.74. WW 0.29–0.32. Brachiolum setae not observed. Squama setiferous.

Legs ( Figs 19G–K View FIGURES 19 A – M ). Fore leg: width at apex of tibia 31 (1) Μm ( Fig. 19G View FIGURES 19 A – M ), tibia with single, apical and pectinate spur 15 (1) Μm long ( Fig. 19H View FIGURES 19 A – M ), with three lateral teeth and two preapical setae; ta1-4 without any preapical pseudospurs. Mid leg: width at apex of tibia 31 (1) Μm long ( Fig. 19I View FIGURES 19 A – M ), tibia with single, apical and pectinate spur 20 (1) Μm long with three lateral teeth ( Fig. 19J View FIGURES 19 A – M ) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 31 (1) Μm long ( Fig. 19K View FIGURES 19 A – M ), tibia without spur; comb with 6 bristles; ta1 with two preapical pseudospurs. Claws slender, hooked; pulvilli absent. Lengths and proportion of leg segments as in Table 13.

fe ti ta1 ta2 ta3

p1 445 430 215 203 97

p2 648 437 507 207 141 p3 500 481 512 234 172

ta4 ta5 LR BV SV p1 85 70 0.50 2.38 4.07 p2 94 86 1.16 3.02 2.13 p3 109 78 1.07 2.51 1.91 Hypopygium ( Fig. 19M View FIGURES 19 A – M ). Tergite IX arched, with 12 posterior setae. Membranous anal point trapezoidal. Phallapodeme 86–122 Μm long. Sternapodeme with distinct anterior process. Gonocoxite cylindrical, 137–141 Μm long, 69–71 Μm wide. GcR 1.95–2.06. Gonostylus simple and slender, 98–108 Μm long; megaseta 12–14 Μm long. HR 1.42–1.44. HV 2.20 (1).

Adult female, pupa and larva. Unknown.

Remarks. The divided or faint transverse band of abdominal tergite II and the two bands of macrotrichia on the wing distinguish the adult males of Labrundinia fosteri from any known Labrundinia species. Labrundinia fosteri has been recorded only from its type locality in Colombia. The adults were 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. fosteri remain unknown.