Corynoneura carriana kadalinka Makarchenko et Makarchenko, 2019

Makarchenko, Eugenyi A. Makarchenko Marina A. & Semenchenko, Alexander A., 2019, Towards the taxonomy of Corynoneura Winnertz (Diptera: Chironomidae: Orthocladiinae) from the Russian Far East and Eastern Siberia, Zootaxa 4612 (2), pp. 221-236 : 223-224

Corynoneura carriana kadalinka Makarchenko et Makarchenko , stat. nov.

( Figs. 1–7 , 12–22 )

urn:lsid:zoobank.org:act:EF3DCC35-AA5C-4716-BA2B-22E12E2A6534

Corynoneura kadalinka Makarchenko et Makarchenko, 2010: 360 , Figs. 26–27 ; Ashe & O’Connor 2012: 195; Fu et al. 2017: 158.

Material. Eastern Siberia of Russia: 1 adult male, Zabaikalsk Territory, Chita City neighborhood, Kadalinka River (Amur River basin), 29.VII.2009, leg. N. Saltanova ; 4 adult males, 2 pupal exuviae, Baikal Lake, Zmeevaia Cover of Chivyrkuy Bay , 08. VI.2012, leg. N. Bazova ; 2 adult males, 4 pupal exuviae, 4 larvae and 2 skin of larvae, the same region, Gusinoe Lake of Baikal Lake basin, 20.V.2017, leg. N. Bazova.

Adult male (n = 4). Total length 1.30–1.95 mm. Total length/wing length 1.23–1.86. Total coloration brownish, thorax dark brown.

Head. Clypeus with 7–9 setae. Antenna with 10 flagellomeres and well-developed plume ( Fig. 3 ); length of 2–9 flagellomeres setae 140–208 µm, length of ultimate flagellomere setae in basal part 60–120 µm; ultimate flagellomere 168–248 µm long, shape and sensilla chaetica as in Corynoneura edwardsi group ( Hirvenoja & Hirvenoja1988, Fig. 4 ); sensilla chaetica of ultimate flagellomere sometimes almost reaching tip of flagellomere ( Figs. 4–6 ); length of ultimate flagellomere equal to combined length of seven previous flagellomeres; AR 0.60–0.90. Length (in µm) of palpomeres: 12–14, 16–28, 24–36, 28–40, 44–52.

Thorax. Antepronotum with 0–2 lateral setae; dorsocentrals 4–7; prealars 2; scutellars 2.

Wing. Typical of the genus. Length 0.75–1.23 mm. Costa length/wing length 0.30–0.35.

Legs. Fore trochanter with dorsal keel. Spur of fore leg tibia 26–28 µm long, spurs of mid leg tibia 10–12 µm long, spur of hind leg tibia 40 –44 µm long. Hind leg tibia with comb of 19–20 setae and with slightly curved apical seta; a/d=1.37–2.0; b/d=1.0–1.8. Lengths and proportions of leg segments as in Table 1 .

Hypopygium ( Figs. 1–2 , 7 ). Tergite IX with 3–4 setae on each side; laterosternite IX with 2–4 setae. Sternapodeme inverted V-shaped, with wide middle part. Phallapodeme high, narrowing towards apex, connected to sternapodeme by “lock”. Gonocoxite 128–152 µm long; inferior volsella absent; superior volsella in form of naked and small rounded triangular plate; at least 10 long setae at convexity over superior volsella dorsally. Gonostylus 72–76 µm long, tapering towards tip, megaseta 4–8 µm long.

Pupa (n=3). Coloration of exuviae. Cephalothorax light-brown, abdomen lighter in middle part and darker on sides.

Cephalothorax. Frontal apotome with 2 taeniate setae 80–164 µm long. Thorax smooth, in middle part dorsally near suture with rugulose area. Antepronotum with 2 narrowly taeniate median and 1 hair-like lateral antepronotals 40–60 µm long. Precorneals 52–64 µm long, arranged in one row; Pc 1 and Pc 2 narrow taeniate, Pc 3 widely taeniate. Dc 1, Dc 3 and Dc 4 arranged in one row, Dc 2 displaced ventrally and far from other precorneals. Dc 1 hair-like, 20–40 µm long; Dc 3 widely taeniate, twisted on top ( Fig. 12 ), 128–170 µm long; Dc 4 narrowly taeniate or hair-like, 40–60 µm long. Distance between Pc 1 and Pc 3 60–80 µm; distance between Pc 3 and Pc 4 16–28 µm. Wing sheaths apically with 3 rows of good visible pearls and sometimes 4–5 rows of poorly visible pearls in middle part.

Abdomen. Tergite I without shagreen. Tergites II with shagreen of small spinules in middle part. Tergites III–IX with more distinct shagreen of spinules than tergite II, located in central part and without shagreen in lateral part ( Fig. 15 ). Sternite I with sparse colorless needle-like spinules, located mainly in antero-lateral corners. Colorless needle-like spinules covering entire surface of sternite II, in middle part spinules thicker and longer ( Fig. 13 ). Sternites III–VIII with same kind of shagreen as tergites III–VIII in central part, but less intense. Sternite IX with shagreen of small spinules in central part anteriorly. Pupae of males with rows of 10–20 relatively strong hooklets situated on tergites II–VII ( Fig. 15 ), with 11–26 hooklets on sternites III–VII and 4 hooklets on sternite VIII. Pupae of females with 7–19 hooklets on tergites III–VII and with 11–17 hooklets on tergites III–VII. Segment I with 0–2 pairs of short hair-like lateral setae. Segment II usually with 3 pairs of short hair-like lateral setae, but pupae of 2 males in one side have 3 hair-like setae, in other side 3 hair-like setae and 1 taeniate seta; pupa of 1 male with 2 pairs of hair-like setae and 2 pairs of taeniate setae. Segments III–VIII with 4 pairs of taeniate setae. Anal lobe 188–220 µm long and 102–120 µm wide, with fringe of 45–52 setae 380–500 µm long, 1 taeniate inner seta 44–176 µm long and 3 taeniate macrosetae 280–300 µm long. Anal lobe 204–220 µm long and 102–120 µm wide (index of anal lobe 1.5–1.96). Male genital sac extending 16–24 µm beyond anal lobe ( Fig. 14 ).

Fourth instar larva (n=4). Total length 2.7–3.2 mm.

Head. Head capsule yellowish, dorsally with mesh pattern; 275–300 µm long and 150–175 µm wide ( Fig. 16 ). S I –S II and S IV of labrum short and hair-like, S III stick-shaped and longer than other labral setae. Pecten epipharyngis consists of 3 scales. Premandible with one apical tooth, on which some very small teeth (poorly visible), brush with long and thin setae ( Fig. 22 ). Antenna 574–602 µm long, longer than head in 1.9–2.1 times; with 4 segments, from which segments 2–3 brown, while the rest are yellowish. Length antennal segments (in µm): 292–320, 128–136, 144–160, 5–6. Basal segment with one ring organ in middle part or sometimes little more distally, with 2 setae in distal half and with short antennal blade in apex. Lauterborn organs absent ( Figs. 17–18 ); AR 1.04–1.08. Mandible with 4 inner teeth, apical tooth shorter than first inner tooth; seta subdentalis absent; seta interna with some branches ( Fig. 20 ). Mentum with 3 median teeth and 5 pairs of lateral teeth; middle tooth smaller than adjacent teeth ( Fig. 19 ).

Anal tubules shorter than posterior parapods bearing simple hooks. Procercus in shape of small tubercle, bearing 4 apical anal setae which 368–448 µm long; 2 lateral setae short and thin. Ventral basal part of posterior para- pods with plumose dark brown seta ( Fig. 21 ), longest branches of which 68–84 µm.

Figures

FIGURES 1–6. Adult male of Corynoneura carriana kadalinka. 1–2, hypopygium in dorsal view; 3, antenna; 4–6, ultimate flagellomere. L—“lock”. Scale bars: Figs. 1–2—20 µm; Fig. 3—100 µm; Figs. 4–6 –50 µm.

FIGURES 7–11. Adult males of Corynoneura carriana kadalinka from Baikal Lake basin (7) and C. carriana s. str. From Sweden (8–9) and Ural Region (10–11). 7–8, 11, hypopygium in dorsal view; 9–10—antenna.

FIGURES 12–22. Pupa (12–15) and larva of fourth instar (16–22) of Corynoneura carriana kadalinka. 12, Dc 3 and Dc 4 setae; 13, colorless needle-like spinules of sternite II; 14, anal segment of male; 15, tergites III–V; 16, head; 17, basal segment of antenna; 18, antenna; 19, mentum; 20, mandible; 21, posterior parapods and procercus; 22, premandible. Scale bars 20 µm.

FIGURES 24–29. Adult males of Corynoneura sikhotealinensis sp. nov. (24–26), C. fujiundecima Sasa (27–28) and Corynoneura sp. (29). 24, 28–29, hypopygium in dorsal view; 25–26, gonocoxite and gonostylus; 27, apex of hind leg tibia. Tr—“trunnion”. Scale bars 20 µm.