Kribiodorum malicky Cranston

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: 539-541

publication ID

https://doi.org/10.11646/zootaxa.4486.4.7

publication LSID

lsid:zoobank.org:pub:9503B15D-3126-43E4-BDA0-E66465227BC8

persistent identifier

http://treatment.plazi.org/id/4350DE26-0140-1975-FF5E-0FB4CA7A7929

treatment provided by

Plazi

scientific name

Kribiodorum malicky Cranston
status

sp. n.

Kribiodorum malicky Cranston   sp. n.

( Figs. 1I View FIGURE 1 , 2B,G View FIGURE 2 ) urn:lsid:zoobank.org:act: 39DE5E3E-F55F-4D5A-AD60-0E9 BBEFB 7A24

Material examined. Holotype Ƌ, THAILAND, ' Fluss bei Mae Ping , ca 10 km N Chiang Dau' [Chiang Mai Province], 17.viii.1991 ( Malicky ) ( ZSM). Paratype 1♀, as holotype   .

Description. Male (n=1, uncleared, tarsomeres variably missing). B.l. 2.6 mm, W.l. 1.35 mm.

Head. Fl1–12 465, Fl13 340, A.R. 0.7. 13 clypeals. Palps 2–5: 25, 115, 125; 130.

Thorax. Setation unidentifiable except for 3 Pa.

Wing extensively dark from brachiolum (as Fig 1C View FIGURE 1 , pulchrum   - type) with pale transverse bands across distal quarter of wing and mid-wing involving base of m3+4 and distal cu interrupted by continuous dark connecting through cell m1+2; vein setation: R with 10–11, R1 with 9–10 and R4+5 with 12–14. V. R. 1.4.

Leg pigment apparently as in K. pulchrum   , darker except Fe and Ti of P2 pale; measurable lengths: P1 365, 215, –; P2 285, 180, 110, 50, 30, 16, 25; P3 380, 290, 200, –. Calculable ratios: LR2 0.61, BV2 4.75, SV2 4.7; SV3 3.3.

Hypopygium ( Fig. 2B View FIGURE 2 ) with 9–10 long TIX setae; anal point recurved, dilate apically, length and precise shape not measurable. Superior volsella ( Fig. 2G View FIGURE 2 ) 30 long, hyaline lobe dorso-medially directed arising from broad, microtrichiose base. Base of sv dorsal-lateral to squat lobe bearing four 15 long setae arising from strong tubercles, identified here as a median volsella. Inferior volsella slender, gently curved inward, microtrichiose and with regular setae, none distinctly apical. Gonocoxite 82, swollen; gonostylus 107, medially broadened (likely dilate in lateral view) tapered distally.

Female (n=1, partially cleared)

B.l. 2.2 mm, W.l. 1.45 mm.

Head: Antennal 6 flagellomere lengths 52, 30, 50, 50, 50, 74, A.R. 0.32; with paired hyaline sensilla (25–30 long) opposite and subapical on 2–6; terminal flagellomere dark ( Fig. 3A View FIGURE 3 ). Palp with segment lengths 180, 140, 115, 25. 15 clypeals, 4 aligned verticals.

Thorax as in male, Dc 5 with 1 in humeral position; Pa 3, Scts 2.

Wing pattern as male. V.R. 1.32. Vein setation: R with 13, R1 with 12 and R4+5 with 14–6.

Legs as male except slightly dilate fore-femur is depilate, thus length, strength and pigmentation of distal setae not discernible. Leg lengths: P1 400, 225, 540, 300, 200, 155, 80; P2 290, 205, 165, 50, 30, 20, 17; P3 465, 325, 248, 130, 120, 75, 45; Ratios: LR1 2.4, LR2 0.80, LR3 0.75, BV1 1.6, BV2 5.6, BV3 2.73, SV1 1.16, SV2 3.0, SV3 3.26.

Genitalia ( Fig. 3B –C View FIGURE 3 ). Notum long, thin, with short rami. Gonocoxapodemes gently curved not fused medially, each with apparent weak branch into gonapophysis VIII. Coxosternapodeme strongly sclerotized, weakly curved. Gonapophysis VIII ( Fig. 2C View FIGURE 2 ) comprising elongate dorsomesal lobe, essentially continuous with inner contour of vagina, microtrichiose, hyaline apico-medially, and distinct ventrolateral lobe of similar size to dorsomesal lobe, lying lateral to, and separate to dorsomesal lobe, microtrichiose with many short simple medio-apically directed setae. Apodeme lobe not visible. Labia well developed, hyaline, without microtrichia. Gonocoxite IX small, not extended laterally. Tergite IX broad, densely setose, undivided. Postgenital plate not visible. Seminal capsule midbrown, near spherical, 50um diameter, with weak neck; spermathecal duct straight, thick-walled, dilate prior to fusion at apparent common opening. Cerci large, quadrate, 85 long by 30 wide in dorsal view.

Larva and Pupa unknown.

Etymology. (Derivato nominis). In recognition of Hans Malicky, Austrian trichopterist, collector of many important Chironomidae   from Thailand. To be treated as a noun in apposition.

ZSM

Bavarian State Collection of Zoology