Chironomus perpulchrum ( Mitchell, 1908 )

Cranston, Peter S., 2018, Kribiodorum Kieffer (= Stelechomyia Reiss) (Diptera: Chironomidae) extends into the Oriental region: three new species and expanded diagnoses, Zootaxa 4486 (4), pp. 535-547 : 543-545

publication ID	https://doi.org/ 10.11646/zootaxa.4486.4.7
publication LSID	lsid:zoobank.org:pub:9503B15D-3126-43E4-BDA0-E66465227BC8
DOI	https://doi.org/10.5281/zenodo.5961047
persistent identifier	https://treatment.plazi.org/id/4350DE26-014C-1979-FF5E-0F67CEAD7F4C
treatment provided by	Plazi
scientific name	Chironomus perpulchrum ( Mitchell, 1908 )
status

Treatment

Chironomus perpulchrum ( Mitchell, 1908)

( Figs. 1A,D, L View FIGURE 1 , 2C,H View FIGURE 2 )

Lauterborniella perpulcher (Mitchell) ; Johannsen, 1937; ToWnes, 1945.

Stelechomyia perpulchra (Mitchell) View in CoL ; Reiss, 1990

Kribiodorum perpulchra (Mitchell) ; Epler et al., 2013

Tendipedini sp. A; Roback (1953), LarVa.

Material examined. 1 Le / Pe / Ƌ (on 2 slides): CANADA, Québec, R. Rouge nr. Calumet , 1.v.1980, reared from dead roots of Acer (A. Borkent), CH9121 CNC Ottawa ( ZSM) .

Description (n=1)

B.l. 5.1mm, W.l. 2.6 mm.

Head. Antenna. Fl1–12 570, Fl13 960, A.R. 1.68. 32 clypeals, 4 aligned verticals. Palpomeres (2–5) 63, 125, 205, 252. Thorax ( Fig. 1A View FIGURE 1 ). Ac>5, Dc 9 with 1 in humeral position; Pa 4–5, Scts 4.

Wing ( Fig. 1D View FIGURE 1 ) brown with clear base, clear areas in bases and apices of cells r4+5, m1+2, cu, forming two incomplete pale transverse bands. V.R. 1.19. Vein setation: R with 24, R1 with 18, R4+5 with 19–21 in distal 2/3 only.

Legs. Apical femora strongly dilated, darkened, bearing dense dark long setae contrasting to pale setae arising from pale cuticle; apical 1/3 to 1/2 of Ta1 darkened ( Fig. 1L View FIGURE 1 ); other tarsomeres on all legs with apical dark bands, or completely dark on ta3–5 (P1) or only Ta5 uniformly mid-brown. Lengths: P1 1320, 760, 1520, 960, 68, 520, 200; P2 1240, 1060, 640, 280, 200, 140, 100; P3 1460, 1160, 800, 480, 400, 260, 120. Ratios: LR1 2.0, LR2 0.60, LR3 0.53; BV1 1.52, BV2 4.08, BV3 2.0; SV1 1.39, SV2 3.59, SV3 3.78. Foretibial spine 70, tapering, sinuous.

Abdomen. Strongly and densely setose, more densely clustered medially, with setae at least 300 long.

Genitalia ( Fig. 2C,H View FIGURE 2 ). TIX with 22 anal tergite setae in mid-tergite, setae stronger antero-medially and weaker posterolaterally, clustered between strong tergal bands. Anal point parallel-sided, downwardly curved seeming a little spatulate, protruding by 50 from squared-off anal tergite. Superior volsella ( Fig. 2H View FIGURE 2 ) 100 long, curved, with microtrichiose base bearing 10–11 setae, directed posteriorly except median pair directed medially; digitus 60 long curved and tapering evenly to postero-medial directed fine point. Median volsella with 5–6 fine setae arising from tubercle bases forming squat, volsella. Gcx 120, gently rounded, Gst 190, not especially tapered, with rounded apex.