Beardius neusae, 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 : 52-53

Beardius neusae sp. n.

( Figs 92–94 )

Type material. Holotype: male, BRAZIL, Amazonas State : Novo Aripuanã, Soka Gakkai Reserve, 07– 09.vii.2008, Pennsylvania trap, N. Hamada et al. ( MZSP) . Paratype: 1 male, as holotype ( ZMBN) .

Diagnostic characters. The species belongs in the parcus group. The male can be separated from all other members of the genus by the combination of the following characters: acrostichals absent; median volsella wartlike; and inferior volsella without basal projection, with thin subapical setae.

Etymology. Named after Dr. Neusa Hamada for all her help and enthusiasm and for collecting the material of this species.

Description

Male (n = 1–2). Total length 1.96–2.13 mm. Wing length 1.02–1.07 mm. Total length / wing length 1.93–2.00. Wing length / length of profemur 2.06–2.11.

Coloration. Head, thorax and abdomen pale. Legs pale.

Head. AR 0.86–0.91, ultimate flagellomere 401–439 µm long. Inner vertical 1, outer verticals 4–5, postorbitals 2–3. Clypeus with 11 setae. Tentorium 81–86 µm long, 15–20 µm wide. Stipes 96 µm long. Palpomere lengths (in µm): 22–24, 25–30, 56–63, 81–89, 124. Third palpomere with 1–3 sensillae subapically, longest 13–15 µm long.

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

Wing ( Fig. 92 ). VR 1.38–1.42. R with 0–4 setae, R 1 with 0–4 setae, R 4+5 with 16–55 setae. Brachiolum with 2 setae. Remaining veins bare.

Legs. Spur of fore tibia (including scale) 37 µm long, spur of mid tibia (including comb) 59 µm long, spur of hind tibia (including comb) 59 µm long. Width at apex of fore tibia 37 µm, of mid tibia 37 µm, of hind tibia 43 µm. Lengths and proportions of legs as in Table 17.

Hypopygium ( Figs 93–94 ). Anal point absent. Tergite IX without setae, tergal bands present. Laterosternite IX with 1–2 setae. Phallapodeme 48–51 µm long. Transverse sternapodeme 27–29 µm long. Gonocoxite 86–89 µm long. Superior volsella digitiform, curved, 48–51 µm long, with 7–8 dorsal, 2 apical, and 2 ventral setae, with microtrichia dorsally in basal 1/3. Median volsella 3 µm long, with 2–3 apical setae, longest 15–23 µm long. Inferior volsella weakly clavate, 57–59 µm long, with 2 apical thin and 7–8 subapical, stout setae; without projection. Gonostylus 94–96 µm long. HR 0.91–0.93. HV 2.10–2.22.

Female and immatures. Unknown.

Distribution. The species is collected in the Amazonas State in Brazil.

Figures

FIGURES 92–94. Beardius neusae sp. n., male. 92—wing; 93—tergite IX and dorsal aspect of left gonocoxite and gonostylus; 94—hypopygium with tergite IX removed, left dorsal aspect, right ventral aspect.