Diamesa kasymovi Kownacki et Kownacka, 1973

Diamesa kasymovi Kownacki et Kownacka, 1973 View in CoL

Figs. 3–4 View FIGURE 3 View FIGURE 4

Material examined. 2 males, 1 female; Iran, East Azerbaijan, Elburz Mountains, Kaleybar ; 38.8406797˚N, 46.9986879˚E; elev. 1675 m; 14.vi.2022; leg. H. Ibrahimi, dep. ROM . 1 male; Iran, Kurdistan, Central Iranian Range; Bayanchub ; 35.5734466˚N, 46.971835˚E; elev. 1936 m; 27.iii.2023; leg. E. Ghaderi & E. Karimian; dep. ROM .

Adult male ( Fig. 3 View FIGURE 3 ). As described and illustrated by Kownacki & Kownacka (1973).

Adult female (n = 1). Total length 5.1 mm. Wing 3.0 mm long and 1.2 mm wide. TL/WL 1.7.

Color. Head, thorax, legs dark brown. Abdomen and wings greyish brown.

Head ( Fig. 4A View FIGURE 4 ). Antennal with 7 flagellomeres (length in μm): 87, 43, 51, 33, 42, 29, 143; AR 0.5. Eyes hairy, with short dorsomedial extension. Temporal setae 22, including 7 inner and 5 outer verticals, 6 orbitals, and 4 frontals. Tentorium 256 μm long. Clypeus squared, 97 μm long and 148 μm wide; bearing 8 setae, 56–66, 61 μm long. Palpal segments lengths (in μm): 60, 79, 138, 143, 255; third palpomere with 5 sensilla chaetica and circular sensilla capitata at the base with 24 μm diameter. HW/ PL 0.98.

Thorax ( Fig. 4B View FIGURE 4 ). Acrostichals absent; dorsocentrals 9 in single row; prealars 7; scutellars 20 in two to three rows. Antepronotal lobe bearing 10 setae basoventrally.

Wing ( Fig. 4C View FIGURE 4 ). Brachiolum with 2 setae; R with 14 setae; R 1 with 13 setae; other veins bare; alula with 9 setae; squama with 40 setae. Costa extension 125 μm long. Anal lobe slightly produced. RM /MCu 2.4; VR 0.7. Microtrichia visible at 25 × magnification.

Legs. Fore tibia spur 60 μm long, mid tibia spurs 51 and 47 μm long, hind tibia spurs 69 and 44 μm long, hind tibia comb with around 20 spines. Pseudospurs on tarsal segments 1–2 of all legs. Lengths and proportions of legs as in Table 3 View TABLE 3 .

Genitalia ( Figure 4A–E View FIGURE 4 ). Gonapophysis VIII with large ventrolateral lobe covering the dorsomesal lobe near base of labia; apodeme lobe thin close to ventreolateral lobe ( Fig. 4E View FIGURE 4 ). Seminal capsule ovate, 120 and 98 µm long, 63, 76 µm wide, respectively. Notum 184 µm long, with ramus 263 µm long. Tergite IX setigorous protrusion is not detectable in this specimen. Gonocoxite developed, but small. Cercus pediform, 139 µm long and 218 µm wide.

Immatures. Unknown.

Remarks. This species has a west Palaearctic distribution that extends to the Caucasus and Middle East. This is a new faunistic record for Iran.