Corynoneura, Edwards

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 : 229-230

Corynoneura sp.

( Fig. 29–32 )

Material. Russian Far East: 1 mature pupa (male), Khabarovsk Territory, Kiva River, between villages Elban and Volochaevka (tributary of Nuskhi River, Amur River basin), 28.VIII.2010, leg. N. Yavorskaya.

Adult male (extracted from pupal exuviae, n = 1). Clypeus with 7–9 setae. Antenna with 11 flagellomeres and well-developed plume; AR 0.73–0.77. Length of palpomeres 2–5 (in µm): 24, 30, 32, 48. Dorsocentrals 3; prealars 2; scutellars 2. Legs. Fore leg trochanter with dorsal keel. Hind leg tibia with comb of 10–11 setae and with long and straight apical seta.

Hypopygium ( Fig. 29 ). Tergite IX with 3–4 setae on each side; laterosternite IX with 2–3 setae. Sternapodeme wide, 32 µm long. Phallapodeme low, sickle-shaped, located on trunnion. Gonocoxite 104 µm long; inferior volsella with hyaline apex, located near the top of gonocoxite; superior volsella bare and triangular. Gonostylus 32 µm long and 16 µm wide; megaseta 12 µm long.

Pupa (n = 1). Exuviae light-brown.

Cephalothorax. Frontal apotome with 2 simple setae. Thorax with small teeth in 1–5 rows in front part dorsally, near suture ( Fig. 30 ). Antepronotum with 2 simple median and without lateral antepronotals. Precorneals simple, uniserial. Three dorsocentrals simple and short. Distance between Pc 1 and Pc 2 46–48 µm; distance between Pc 2 and Pc 3 16–68 µm. Wing sheaths with 4–5 short rows of pearls.

Abdomen. Tergite I without shagreen. Tergites II–VIII with shagreen of small spinules. Sternite I naked. Sternite II with very tender shagreen in central part and without colorless needle-like spinules. Sternites III–VIII with shagreen of small spinules. Tergites II–VI with posterior rows of relatively strong hooklets, number of which is 4, 11, 12, 6 respectively ( Fig. 31 ). Sternites III–VII also with posterior rows of relatively strong hooklets, number of which is 6, 10, 15, 13, 6 respectively. Segment I with 1 pair of short hair-like lateral setae. Segment II with 2–3 pairs of short hair-like lateral setae. Segments III–VIII with 4 pairs of taeniate setae.Anal lobe 160 µm long and 100 µm wide (index of anal lobe 1.6), with fringe of 32–36 setae, 1 taeniate inner seta and 3 taeniate macrosetae. Male genital sac reaching posterior margin of anal lobe ( Fig. 32 ).

Remarks. Corynoneura sp. is closely related to C. lacustris but differs by some features of adult male and pupa listed in the key for this species given below.

Figures

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.

FIGURES 30–35. Pupae of Corynoneura sp. (30–32) and C. schleei Makarchenko et Makarchenko (33–35). 30, teeth in front part of thorax, dorsal view; 31, tergites III–IV; 32, 34, anal segment of male; 33, tergite III; 35, anal segment of female.