Labrundinia hirsuta 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 : 51-54

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.5621047
persistent identifier	https://treatment.plazi.org/id/676987A8-B730-FFE4-FF29-F8D7FCDAFE9B
treatment provided by	Plazi
scientific name	Labrundinia hirsuta Roback, 1987
status

Treatment

Labrundinia hirsuta Roback, 1987 View in CoL

( Fig. 23 View FIGURES 23 A – M )

Labrundinia hirsuta Roback, 1987: 221 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). 4 Paratypes: 1 male same data as holotype except for 6.iii.1971 ( ANSP). 3 male same data as holotype except for 9.iii.1971 ( ANSP).

Diagnostic characters. Labrundinia hirsuta differs from other Labrundinia species by the combination of the following characters. Adult male: abdominal tergites I–II pale, T II-V with narrow, laterally tapered band T VI with U-shaped band, T VI–VIII almost completely brown; hypopygium pale, sternapodeme with distinct anterior process.

Adult male (n = 5 unless otherwise stated)

Size. Total length 2.1–2.5 (2) mm. Wing length 1.2–1.3 (4) mm. Total length/wing length 2.04–2.15 (2). Wing length/ profemur length 2.81–3.11 (3).

Coloration. Head brown with dark brown occipital margin; pedicel and antenna brown; maxillary palp pale. Thorax dark brown; antepronotum pale; supraalar callus dark brown. Wing membrane transparent with one median band present, about ⅔, formed mostly by dark hairs. Legs pale brown. Femur I with apex brown, Fe II–III brown. Tibia I with apex and base brown, Ti II pale, Ti III with apex brown. Tarsomere 1 with apex brown, tarsomeres 2–5 pale brown. Abdominal tergites I–II pale, II-V with narrow, laterally tapered band T VI with U-shaped band, T VI– VIII almost completely brown; hypopygium pale ( Fig. 23L View FIGURES 23 A – M ).

Head ( Figs 23A–E View FIGURES 23 A – M ). Temporal setae 10–15, uniserial ( Fig. 23B View FIGURES 23 A – M ). Eye ratio 1.18–1.50. Tentorium ( Fig. 23C View FIGURES 23 A – M ) 112–147 Μm long. Clypeus 98–125 (4) Μm long, 69–88 Μm wide at largest part, bearing 16–19 setae. Cibarial pump 161–170 (4) Μm long ( Fig. 23D View FIGURES 23 A – M ), with anterior margin concave. Lengths of palpomeres 1–5 (in Μm): 33–37 (4); 49–65; 118–133; 137–159 (4); 233–239 (4). Antennal flagellum 843–857 (4) Μm long, diameter of pedicel 107– 119 (3) Μm, apical setae single ( Fig. 23E View FIGURES 23 A – M ), AR 1.52–1.55 (2).

Thorax. Antepronotum with 5–6 (4) lateral setae. Acrostichals 40–44 (4), biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 20–22, irregularly biserial; prealars 8–9 (4); supraalars 3 (4). Anapleural suture ratio 0.46–0.52. Scutellum with transverse row of 8–10 setae and group of numerous fine anterior setae.

Wing ( Fig. 23F View FIGURES 23 A – M ). Width 0.3–0.4 (4) mm. Costa 1.0–1.1 (4) mm long. R2+3 present. VR 0.72–0.77 (4). WW 0.27–0.31 (4). Brachiolum with 2 setae (3). Squama setiferous.

Legs ( Figs 23G–K View FIGURES 23 A – M ). Fore leg: width at apex of tibia 31–39 Μm ( Fig. 23G View FIGURES 23 A – M ), tibia with single, apical and pectinate spur 13–16 (3) Μm long ( Fig. 23H View FIGURES 23 A – M ), with four and two preapical setae; ta1 with two preapical pseudospurs. Mid leg: width at apex of tibia 31–39 (4) Μm long ( Fig. 23I View FIGURES 23 A – M ), tibia with single, apical and pectinate spur 16–25 (3) Μm long with four teeth ( Fig. 23J View FIGURES 23 A – M ) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 39 (2) Μm long ( Fig. 23K View FIGURES 23 A – M ), tibia without spur; comb with 8 (4) bristles; ta1 with two preapical pseudospurs. Claws slender, hooked; pulvilli absent. Lengths and proportion of leg segments as in Table 15.

fe ti ta1 ta2 ta3

p1 422–481 438–481 273–297 (2) 188–195 (2) 125–141 (2) p2 602–688 503–523 581 (1) 259 (1) 141

p3 523–546 (3) 643 (1) 555 (1) 281 (1) 184 (1) ta4 ta5 LR BV SV

p1 94–96 (2) 63 (2) 0.55–0.62 (2) 2.42–2.62 (2) 3.02–3.62 (2) p2 95 (1) 78 (1) 1.16 (1) 2.97 (1) 1.95 (1) p3 133(1) 86 (1) 0.86 (1) 2.54 (1) 2.13 (1) Hypopygium ( Fig 23M View FIGURES 23 A – M ). Tergite IX arched, with 12–13 posterior setae. Membranous anal point trapezoidal, slightly concave. Phallapodeme 55–67 (2) Μm long. Sternapodeme with distinct anterior process. Gonocoxite cylindrical, 137–151 Μm long, 62–75 Μm wide. GcR 1.89–2.40. Gonostylus simple and slender, 86–92 Μm long; megaseta, 16–18 (3) Μm long. HR 1.55–1.75 (4). HV 2.44 (1).

Adult female, pupa and larva. Unknown.

Remarks. Adults of Labrundinia hirsuta can easily be separated from all other Labrundinia species by the narrow transverse, laterally tapered band on abdominal tergite V and U-shaped band on tergite VI. Labrundinia hirsuta 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. hirsuta remain unknown.