Xestochironomus dickinsoni , Pinho, Luiz Carlos & Souza, João Francisco, 2013

Pinho, Luiz Carlos & Souza, João Francisco, 2013, New species of Xestochironomus Sublette et Wirth, 1972 (Diptera: Chironomidae) from Atlantic Forest, Brazil, Zootaxa 3652 (5), pp. 595-600: 595-597

publication ID

http://dx.doi.org/10.11646/zootaxa.3652.5.9

publication LSID

lsid:zoobank.org:pub:BDC89CF9-3D8C-4566-9AE9-4F8EE577ABFC

persistent identifier

http://treatment.plazi.org/id/A86487F6-9811-7A4E-FF13-F8B9C746FE2B

treatment provided by

Plazi

scientific name

Xestochironomus dickinsoni
status

sp. n.

Xestochironomus dickinsoni  sp. n.

( Fig. 1View FIGURE 1)

Type material. Holotype male: Brazil, Pernambuco State, Bonito, Pedra Redonda, Rio Verdinho, S08° 32 ’ 33 ” W 35 ° 42 ’ 50 ”, 485m a.s.l., 02.viii. 2009, Light trap, A.R. Calor & L.S. Lecci (MZUSP 1257). Paratypes: 1 male, same data as holotype (MZUFBA EA00028).

Diagnostic characters. The new species can be distinguished from other congeners by its conspicuous long anal point and short and forked gonostylus, with a short and pointed outer lobe and a larger and rounded inner lobe.

Etymology. The specific epithet honors Bruce Dickinson, heavy metal band Iron Maiden’s lead singer.

Male (n = 2, except when otherwise stated)

Total length 2.64–3.14mm. Wing length 1.38–1.60mm. Total length / wing length 1.92–1.97. Wing length / length of profemur 0.64–0.70.

Coloration. Head and thorax stramineous. Legs: foreleg stramineous with apex of femur, tibia and tarsi dark brown, mid and hind legs completely stramineous. Abdominal segments as follows: TI brown, TII –VIII stramineous with brown posterior margin on TII –V. Wings transparent.

Head. AR 1.3 (1), ultimate flagellomere 581 μm (1) long. Temporal setae 11–12. Clypeus with 9–10 setae. Tentorium 104–133 μm long. Palpomere lengths (1–5) (in μm): 24–29; 27–58; 97–145; 85 – 85; 94–121. Third palpal segment with 4–5 sensilla clavata, longest 14–15 μm long.

Thorax. Dorsocentrals 11–14; acrostichals 17–18; prealars 4; scutellars 8–11, biserial.

Wing ( Fig. 1View FIGURE 1 A). Brachiolum with 2 (1) setae. R with 17–30 setae; R 1 with 18–28 setae; R 4 + 5 with 36–46 setae at apex. Squama with 2 (1) setae. Anal lobe rounded.

Legs. Spur of midtibia 39 μm (1) long. Spur of hind tibia 39 μm (1) long. Width at apex of foretibia 48–58 μm, of midtibia 39–58 μm, of hind tibia 48–58 μm. Lengths (in μm) and proportions of legs in Table 1. Hypopygium ( Fig. 1View FIGURE 1 B –D). Tergite IX with 7–9 median strong setae and 16–17 posterior setae. Anal tergite bands present. Laterosternite with 4–5 setae. Anal point 68–75 μm long, 12 μm wide 1 / 3 from apex, 17 μm wide at apex. Phallapodeme 63–75 μm long. Gonocoxite 97–114 μm long; superior volsella 53–58 μm long. Inferior volsella 87–97 μm long. Gonostylus 109–116 μm long, forked, with short pointed outer lobe and larger rounded inner lobe. HR 0.8 –1.0; HV 2.3–2.9.

Female and immatures. Unknown.