Beardius nebularius, Pinho & Mendes & Andersen, 2013

Pinho, Luiz Carlos, Mendes, Humberto Fonseca & Andersen, Trond, 2013, Revision of Beardius Reiss et Sublette, 1985 (Diptera: Chironomidae), with the description of twenty new species, Zootaxa 3742 (1), pp. 1-78: 49-50

publication ID

http://dx.doi.org/10.11646/zootaxa.3742.1.1

publication LSID

lsid:zoobank.org:pub:78959DF2-CFF7-442A-B7B3-0B1A053A4D73

DOI

http://doi.org/10.5281/zenodo.5271941

persistent identifier

http://treatment.plazi.org/id/DB2587A5-E45E-FFE5-FF19-66EE7E3DFB10

treatment provided by

Felipe

scientific name

Beardius nebularius
status

sp. n.

Beardius nebularius   sp. n.

( Figs 89–91 View FIGURES 89–91 )

Type material. Holotype: male, BRAZIL, Santa Catarina State: Urubici, São Joaquim National Park, Morro da Igreja , Rio Pelotas , 1670 m a.s.l., S28°07'37" W49°28'47", 18.viii.2004, CDC trap, L.C. Pinho & L.E.M. Bizzo ( MZSP) GoogleMaps   . Paratypes: 1 male, as holotype ( MZSP)   ; 1 male, as holotype except 18.viii–05.xii.2004, Malaise trap ( ZMBN)   . 3 males, Urubici, Pousada Nossa Senhora das Graças, 900 m a.s.l., S27°59'46" W49°34'02", at light, L.C. Pinho & L.E.M. Bizzo ( MZUFBA, INPA, ZMBN) GoogleMaps   .

Diagnostic characters. The species belongs in the tupinamba   group. The male can be separated from all other members of the genus by the combination of the following characters: coloration brown; R 1 bare; superior volsella with microtrichia; and projection of inferior volsella arising along basal 2/3 of the volsella, overreaching the volsella, with microtrichia and fringe of long lamellae.

Etymology. From Latin nebularius   , meaning cloudy, referring to the cloud forest surrounding the type locality. Description

Male (n = 5–6, except when otherwise stated). Total length 2.93–3.28, 3.20 mm. Wing length 1.77–1.95, 1.85 mm. Total length / wing length 1.66–1.80, 1.73. Wing length / length of profemur 2.48–2.63, 2.56.

Coloration. Head and abdomen light brown. Thorax stramineous with scutum, vittae, postnotum and preepisternum light brown. Legs stramineous.

Head. AR 1.15–1.27, 1.22; ultimate flagellomere 533–642, 580 µm long. Temporal setae 10–14, 12; not well separated in inner and outer verticals and postorbitals. Clypeus with 9–13, 11 setae. Tentorium 88–139, 121 µm long; 25–35, 30 µm wide. Stipes 116–127, 121 µm long. Palpomere lengths (in µm): 30–48, 38; 38–45, 41; 96–121, 110; 126–147, 135; 157–195, 180. Third palpomere with 2 sensillae subapically, longest 10–13, 11 µm long.

Thorax. Scutal tubercle absent. Dorsocentrals 6–7, 7; acrostichals absent; prealars 2. Scutellum with 4 setae.

Wing ( Fig. 89 View FIGURES 89–91 ). VR 1.44–1.58, 1.51. R with 3–7, 5 setae; R 4+5 with 1–2 setae at apex. Brachiolum with 2 setae. Remaining veins bare.

Legs. Spur of fore tibia (including scale) 35–50, 45 µm long; spur of mid tibia (including comb) 51–68, 59 µm long; spur of hind tibia (including comb) 53–73, 60 µm long. Width at apex of fore tibia 43–58, 53 µm; of mid tibia 45–54, 50 µm; of hind tibia 48–59, 55 µm. Lengths and proportions of legs as in Table 16.

Hypopygium ( Figs 90–91 View FIGURES 89–91 ). Anal point bluntly triangular, 3–7, 5 µm long, not reaching posterior margin of tergite IX. Tergite IX without setae, tergal bands weak to absent. Laterosternite IX with 2–3, 2 setae. Phallapodeme 53–63, 59 µm long. Transverse sternapodeme 45–58, 52 µm long. Gonocoxite 116–154, 131 µm long. Superior volsella digitiform, 48–58, 53 µm long, with 6–8, 7 dorsal and 3–5, 4 ventral setae, with microtrichia in basal 2/3 of both dorsal and ventral surfaces. Median volsella 4–5, 4 µm long, with 2–4, 3 apical setae, longest 20–25, 23 µm long. Inferior volsella clavate, 53–66, 59 µm long, with 2 apical thin and 4–7, 5 subapical stout, bifid or trifid setae; projection arising along basal 2/3 of the volsella, with microtrichia and fringe of long lamellae. Gonostylus 126– 144, 137 µm long. HR 0.85–0.98, 0.96. HV 2.14–2.49, 2.33.

Female and immatures. Unknown.

Distribution. The species is collected in the Santa Catarina State in Brazil.

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

ZMBN

Museum of Zoology at the University of Bergen, Invertebrate Collection

INPA

Instituto Nacional de Pesquisas da Amazonia

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Beardius