Neozavrelia zarya, Orel, 2021

Orel, Oksana V., 2021, Revision of the genus Neozavrelia Goetghebuer, Thienemann, 1941 (Diptera Chironomidae) from Eastern Siberia and the Russian Far East, with the description of new species, Zootaxa 4938 (3), pp. 251-297 : 293-296

Neozavrelia zarya sp. nov.

( Figs 132–140 )

http://zoobank.org/NomenclaturalActs/ 355A2DED-90F0-40DB-B16C-F7AB0535BF2D

Type material. Holotype: 1 male, RUSSIA, PRIMORSKY TERRITORY, Lazovsky district, Lazovsky Reserve, Zarya Lake , 05.vii.2007, leg. O. Orel.

Derivatio nominis. From the type locality Zarya Lake.

Diagnosis. Wing 0.98–1.04 mm long. Frontal tubercles minute. AR 0.43–0.49. The anal point short and broad rounded apically, dorsally cover dark strong spinulae located in a semicircle in the apical part. Superior volsella elongated oval-shaped. Digitus reaches or slightly extends beyond edge the medial edge of the superior volsella. Superior volsella without ventral seta.

Description. Adult male (n=3). Total length 1.5–1.6 mm; wing length 0.98–1.04 mm. Total length/wing length 1.54–1.63.

Colouration. Ground colour of thorax and maxillary palpomeres yellowish brown; antenna, scutal stripes, median band on distal half of mesonotum, scutellum, postnotum, halters, legs, and abdomen brown.

Head ( Fig. 136 ). Frontal tubercles minute, about 3 μm in diameter. Temporal setae 8–10. Clypeus with 10–15 setae. Antenna with 13 flagellomeres, 550–560 μm long; ultimate flagellomere 165–185 μm. AR 0.43–0.49. Maxillary palpomeres 2–4 combined 275–290 μm long, their individual lengths (in μm): 30–35: 70–75: 70: 100–110. Antenna length/palp length 1.90–2.03; head width/palp length 1.13.

Thorax. Acrostichals 8–10, dorsocentrals 4–6, prealars 1. Scutellum with 3–4 setae.

Wing width 0.26–0.27 mm ( Figs 137–138 ). VR 1.30–1.33. R with 13–17, R 1 with 3–7, R 4+5 with 3–7, M 1+2 with 23–26, M with 0–5, Cu 1 with 8–13, An with 12–18 setae. Cell r 2+3, r 4+5 with setae, m 3+4 with several setae. Brachiolum with 1 seta.

3+4

Legs (see Table 19). Apical curved tibial spur of fore leg 20 μm long. Combs of mid and hind tibiae separated; each comb bears straight or slightly curved spur, 14–18 μm (mid tibia) to 22–30 μm long (hind tibia). Basitarsus of mid leg without sensilla chaetica.

Hypopygium ( Figs 132–135 , 139–140 ). Anal tergite with H-shaped bands which reach base of anal point, with 3–5 lateral setae on each side, free-microtrichia areas present on the sides of anal tergite bands. The anal point (20–22 μm long and 16–18 μm wide medially) broad, rounded apically, dorsally cover with 14–16 dark strong spinulae (4–10 μm long) located in a semicircle in the apical part and bearing 2 lateral setae on each side of anal point. Gonocoxite 90 μm long, along the inner margin with 3 setae. The width of the transverse sternapodema 42–56 µm. Phallopodema 90–100 μm long, with two hook-shaped outgrowths. Superior volsella elongated oval-shaped (40–44 μm long, 22 μm wide), bearing 4 median setae, and 6–8 fine dorsal setae, microtrichia and ventral seta absent. Digitus 20 μm long reaches or slightly extends beyond edge the medial edge of the superior volsella. Stem of median volsella straight 22–24 μm long, bearing slender lamelliform setae; total length of median volsella 40–42 μm. Inferior volsella curved and rounded apically, 70–74 μm long, with 11 setae. Gonostylus straight, 70–72 μm long and expanded at about median 28 μm. HR 1.25–1.29.

Pupa and larva unknown.

Remarks. Adult male of Neozavrelia zarya sp. nov. by the absence of ventral seta on the superior volsella is more similar to the N. bernensis Reiss, N. cuneipennis (Edwards) and N. samarga sp. nov., but differs from the latter in the following of characters: frontal tubercles minute (about 3 μm in diameter), LR PI 1.60, the anal point broad, with 14–16 dark strong spinulae located in a semicircle (see Table 4).

Distribution. Russian Far East—Zarya Lake (Primorsky Territory).

Figures

FIGURES 132–135. Details of the structure of hypopygium the male Neozavrelia zarya sp. nov. 134—total view of hypopygium, dorsal view; 133—tergite IX and anal point, dorsal view; 134, 135—superior volsella, ventral and dorsal view. Scale bar 50 μm.

FIGURES 136–140. The male of Neozavrelia zarya sp. nov. 136—head and maxillary palps; 137–138—wing; 139, 140—hypopygium. Scale bar 50 μm.