Beardius curticaudatus, 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: 32-35

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.5271913

persistent identifier

http://treatment.plazi.org/id/DB2587A5-E471-FFF6-FF19-64B579CFFD30

treatment provided by

Felipe

scientific name

Beardius curticaudatus
status

sp. n.

Beardius curticaudatus   sp. n.

( Figs 49–53 View FIGURES 49–53 )

Type material. Holotype: male, BRAZIL, Amazonas State : Manaus, AM 010 Km 26, 55 m a.s.l., Adolfo Ducke Forest Reserve, #64, Igarapé Bolívia (Ig. 23), S02°59'14.8" W59°56'47.1", 09–12.xi.2008, Malaise trap suspended 3 m above the ground, U.G. Neiss et al. ( MZSP) GoogleMaps   . Paratypes: 2 males, as holotype ( MZSP, INPA)   . 2 males, Novo Airão, AM 352 Km 9, 123 m a.s.l., Igarapé no Sítio do Sr. Valdenor, #6, S02°42'04.5" W06°55'23.4", 11– 14.viii.2008, Malaise trap suspended 3 m above the ground, A.M.O. Pes et al. ( MZUFBA, ZMBN) GoogleMaps   .

Diagnostic characters. The species belongs in the xylophilus   group. The male can be separated from all other members of the genus by the combination of the following characters: acrostichals present; anal point short; and basal projection of inferior volsella long, digitiform, bearing long lamellae reaching the apex of the inferior volsella.

Etymology. From Latin curticaudatus   , meaning short tailed, referring to the size of the anal point.

Description

Male (n = 4–5). Total length 2.18–2.71, 2.52 mm. Wing length 1.06–1.12, 1.09 mm. Total length / wing length 2.07–2.61, 2.32. Wing length / length of profemur 1.93–2.15, 2.00.

Coloration. Head and abdomen pale; thorax pale, with vittae and scutum stramineous. Legs pale.

Head. AR 1.00–1.32, 1.25; ultimate flagellomere 460–519, 508 µm long. Inner vertical 1; outer verticals 3–4, 4; postorbitals 3–4, 4. Clypeus with 10–13, 11 setae. Tentorium 71–116, 96 µm long; 23–35, 30 µm wide. Stipes 121–129 (3) µm long. Palpomere lengths (in µm): 25–46, 35; 28–46, 35; 99–129, 114; 124–167, 149; 182–233, 202. Third palpomere with 3–4, 4 sensillae subapically, longest 13–15, 14 µm long.

Thorax ( Fig. 50 View FIGURES 49–53 ). Scutal tubercle absent. Dorsocentrals 7–9, 8; acrostichals 7–8, 8; prealars 2. Scutellum with 6 setae.

Wing ( Fig. 49 View FIGURES 49–53 ). VR 1.36–1.50, 1.43. R with 4–8, 6 setae; R 4+5 with 2 setae at apex. Brachiolum with 2 setae. Remaining veins bare.

Legs. Spur of fore tibia (including scale) 37–48, 43 µm long; spur of mid tibia (including comb) 54–64, 59 µm long; spur of hind tibia (including comb) 64–70, 67 µm long. Width at apex of fore tibia 43–48, 46 µm; of mid tibia 43–54, 48 µm; of hind tibia 48–54, 51 µm. Lengths and proportions of legs as in Table 8.

Hypopygium ( Figs 51–53 View FIGURES 49–53 ). Anal point small, bluntly triangular, 5–7, 6 µm long, arising from broadly rounded posterior protrusion of tergite IX. Tergite IX without setae, tergal bands present. Laterosternite IX with 2–3, 2 setae. Phallapodeme 56–58, 57 µm long. Transverse sternapodeme 46–56, 51 µm long. Gonocoxite 101–104, 102 µm long. Superior volsella digitiform, 48–68, 56 µm long, with 3–5, 4 dorsal, 2 apical, and 2 ventral setae, without microtrichia. Median volsella absent. Inferior volsella strongly curved, clavate, 73–89, 83 µm long, with 2 apical thin and 4–5, 4 subapical stout setae, with microtrichia in basal 1/3; projection arising from base of volsella, 66–73, 71 µm long, with about 12 long, curved lamellae. Gonostylus 99–116, 109 µm long. HR 0.89–1.02, 0.97. HV 2.11– 2.40, 2.30.

Female and immatures. Unknown.

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

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

INPA

Instituto Nacional de Pesquisas da Amazonia

ZMBN

Museum of Zoology at the University of Bergen, Invertebrate Collection

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Beardius