Labrundinia nathani Silva, sp. n.
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 nathani

description: Labrundinia nathani Silva sp. n.
(Fig. 41)
Material examined. Type material: Holotype male, Brazil: São Paulo, São Carlos, Monjolinho stream, associated with aquatic macrophyte, Myriophyllum aquaticum, 12.iii.2008, F. L. Silva (MZUSP). Paratype: 1 male same data as holotype (NTNU).
Etymology. Named in honour of Nathan Gilbert Viets from Indianapolis, in recognition for his friendship, kindness and continuous support.
Diagnostic characters. Labrundinia nathani sp. n. differs from other Labrundinia species by the combination of the following characters. Adult male: abdominal tergites II, V with faint transverse band near proximal margin, T III–IV, VI with continuous transverse band near proximal margin, T VII–VIII almost completely brown; hypopygium pale brown, sternapodeme with distinct anterior process.
Description. Adult male (n = 2 unless otherwise stated)
Size. Total length 2.3–2.5 mm. Wing length 1.4 mm. Total length/wing length 1.61–1.74. Wing length/ profemur length 2.69–2.73.
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. Tibia I brown, Ti II–III apically brown. Abdominal tergites II, V with faint transverse band near proximal margin, T III–IV, VI with continuous transverse band near proximal margin, VII–VIII almost completely brown; hypopygium pale brown (Fig. 41L).
Head (Figs 41A–E). Temporal setae 12–18, uniserial (Fig. 41B). Eye ratio 0.83–0.85. Tentorium (Fig. 41C) 161–1.69 Μm long. Clypeus 90–101 Μm long, 63–76 Μm wide at largest part, bearing 18–19 setae. Cibarial pump 200–213 Μm long (Fig. 41D), with anterior margin concave. Lengths of palpomeres 1–5 (in Μm): 37–40; 57–59; 129–138; 138–154; 138–150. Antennal flagellum 824–835 Μm long, diameter of pedicel 153–159 Μm, apical setae single (Fig. 41E), AR 1.13–1.34.
Thorax. Antepronotum with 3 lateral setae. Acrostichals 48–54, biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 30, irregularly biserial; prealars 9–11; supraalars 3. Anapleural suture ratio 0.39–0.46. Scutellum with transverse row of 8 setae and group of numerous fine anterior setae.
Wing (Fig. 41F). Width 0.4 (1) mm. Costa 1.2–1.3 mm long. R2+3 absent. VR 0.78–0.81. WW 0.29 (1). Brachiolum with 2 setae. Squama setiferous.
Legs (Figs 41G–K). Fore leg: width at apex of tibia 42–45 Μm (Fig. 41G), tibia with single, apical and pectinate spur 19–22 Μm long (Fig. 41H), with three lateral teeth and two preapical setae; ta1-4 without any preapical
pseudospurs. Mid leg: width at apex of tibia 42–49 Μm long (Fig. 41I), tibia with single, apical and pectinate spur 25–32 Μm long with three lateral teeth (Fig. 41J) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 43–46 Μm long (Fig. 41K), tibia without spur; comb with 6 bristles; ta1-4 without any preapical pseudospurs. Claws slender, hooked; pulvilli absent. Lengths and proportion of leg segments as in Table 26.
fe ti ta1 ta2 ta3
p1 518–534 521–537 298 267 155 p2 689–710 646 317 189 146 p3 587–607 612–629 670 299 208
ta4 ta5 LR BV SV p1 118 75 0.55 2.20 3.54 p2 146 93 1.23 2.52 1.91 p3 141 93 1.06 2.57 1.85 Hypopygium (Fig. 41M). Tergite IX arched, with 10–12 posterior setae. Membranous anal point rounded. Phallapodeme 61–73 Μm long. Sternapodeme with distinct anterior process. Gonocoxite cylindrical, 137–150 Μm long, 65–66 Μm wide, with slightly concave inner margin. GcR 2.07–2.30. Gonostylus simple and slender, 100– 108 Μm long; megaseta 19–22 Μm long. HR 1.37–1.39. HV 2.12–2.51.
Adult female, pupa and larva. Unknown.
Remarks. Adult males of Labrundinia nathani may be distinguished from those of the related species L. nicaraguensis and L. panamensis by the faint transverse band near proximal margin of abdominal tergites II and V. Labrundinia nathani has been recorded only from its type locality in São Paulo State, Brazil. The adults emerged from the aquatic macrophyte Myriophyllum aquaticum placed in a plastic tray and kept in laboratory. This is a likely habitat for the unknown immature stages.
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 86-87, DOI: 10.11646/zootaxa.3769.1.1, http://zenodo.org/record/250728