Gravatamberus pilosus, Mendes & Andersen, 2008

Mendes, Humberto Fonseca & Andersen, Trond, 2008, A review of Antillocladius Saether and Litocladius Mendes, Andersen et Saether, with the description of two new Neotropical genera (Diptera, Chironomidae, Orthocladiinae), Zootaxa 1887 (1), pp. 1-75 : 54-55

publication ID

https://doi.org/ 10.11646/zootaxa.1887.1.1

persistent identifier

https://treatment.plazi.org/id/5C31878A-FFCF-FFFC-6AAD-FF2B53B5A57D

treatment provided by

Felipe

scientific name

Gravatamberus pilosus
status

sp. n.

Gravatamberus pilosus sp. n.

( Figs 74–78 View FIGURES 74-78 )

Type material: Holotype male, CHILE: VII Region : Talca, El Golfe, 24–27.xii.1995, Malaise trap, T. Andersen ( ZMBN) . Paratypes: 3 males, same date as holotype; 7 males, same date as holotype except for 27.xx.1995– 2.i.1996; 1 male, Pichilemu Centro, 34º23.121’S, 71º59.983’W, 1 m a.s.l., 17.xi.1998, sweep net, T. Andersen ( MZUSP, ZMBN) GoogleMaps .

Diagnostic characters: The species can be separated from all other members of the genus by having more than 10 setae in cell m proximal to RM, costal extension ending close to wing tip, and AR 0.74–0.84.

Etymology: From Latin pilosus , hairy, referring to the strongly hairy wings.

Male (n = 8–10, except when otherwise stated). Total length 1.30–1.50, 1.39 mm. Wing length 0.90–1.12, 1.02 mm. Total length / wing length 1.28–1.47, 1.38. Wing length / length of profemur 2.16–2.39, 2.29 (9). Coloration brown, thorax dark brown without markings, legs uniformly light brown.

Head. AR 0.74–0.84, 0.80. Ultimate flagellomere 220–274, 251 µm long; stout subapical seta 40–65, 51 µm long. Temporal setae 9–12, 10; including 4–6, 5 inner verticals; 2–4, 3 outer verticals; and 2–4, 3 postorbitals. Clypeus with 6–16, 12 setae. Tentorium, stipes, and cibarial pump as in Figure 74 View FIGURES 74-78 . Tentorium 75–91, 83 µm long; 14–20, 16 µm wide. Stipes 84–98, 91 µm long; 27–34, 30 µm wide. Palp segment lengths (in µm): 14–18, 16; 23–29, 26; 57–79, 68; 66–82, 73; 84–148, 113. Third palpomere with 1–2, 2 sensilla clavata subapically; longest 9–16, 14 µm long.

Thorax ( Fig. 75 View FIGURES 74-78 ). Antepronotum with 2–3, 3 setae. Dorsocentrals 16–26, 20; acrostichals 9–17, 11, all scalpellate; prealars 6–8, 7, extended anteriorly; supraalar 0–1, 0. Scutellum with 6–9, 7 setae.

Wing ( Fig. 76 View FIGURES 74-78 ). VR 1.35–1.56, 1.40. C extension 145–168, 157 µm long. Brachiolum with 1 seta; Sc with 19–31, 23 seta; C extension with 25–44, 34 non-marginal setae; R with 18–27, 21 setae; R 1 with 11–19, 14 setae; R 4+5 with 17–29, 23 setae; RM with 0–2, 1 seta; M with 0–2, 1 seta; M with 40–70, 52 setae; M 3+4 with 23–36, 29 setae; Cu with 17–23, 20 setae; Cu 1 with 10–18, 14 setae; PCu with 31–61, 46 setae; An with 21– 28, 25 setae. Cell m with 17–36, 28 setae proximal to RM; r with 350–400 setae; m 1+2 with 400–450 setae; m 3+4 with 10–167, 133 setae; cu + an with 168–262, 210 setae.

1+2

4 + 5

Legs. Spur of foretibia 18–29, 23 (6) µm long; spurs of midtibia 18–27, 22 µm and 11–16, 14 µm long; spurs of hind tibia 32–41, 36 µm and 11–18, 15 µm long. Width at apex of foretibia 20–25, 23 (6) µm; of midtibia 23–25, 24 µm; of hind tibia 25–32, 28 µm. Comb with 8–10, 9 setae; longest 27–38, 33 µm; shortest 16–23, 18 µm long. Lengths and proportions of legs as in Table 12.

Hypopygium ( Figs 77–78 View FIGURES 74-78 ). Tergite IX with 4–10, 6 setae; laterosternite IX with 3–5, 4 setae. Phallapodeme 48–59, 53 µm long; transverse sternapodeme 52–61, 56 µm long. Gonocoxite 104–118, 111 µm long.

Gonostylus 50–66, 60 µm long; megaseta 4–7, 6 µm long. HR 1.70–2.36, 1.87; HV 2.12–2.88, 2.36.

Biology and distribution: This species is recorded only from Central Chile. The type locality is a boggy area densely grown with 3–4 m high shrubs. The locality at Pichilemu is a river estuary .

ZMBN

Museum of Zoology at the University of Bergen, Invertebrate Collection

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Gravatamberus