Diamesa kasymovi Kownacki et Kownacka 1973
Creators: name: Ghaderi, Edris
name: Namayandeh, Armin
name: Ibrahimi, Halil
name: Mohammadi, Habibollah
name: Karimian, Erfan
name: Mansouri, Arman
name: Molodi, Farshad
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Diamesa
Diamesa kasymovi

description: Diamesa kasymovi Kownacki et Kownacka, 1973
Figs. 3–4
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). 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). 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). 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). 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.
Genitalia (Figure 4A–E). Gonapophysis VIII with large ventrolateral lobe covering the dorsomesal lobe near base of labia; apodeme lobe thin close to ventreolateral lobe (Fig. 4E). 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.
description: Published as part of Ghaderi, Edris, Namayandeh, Armin, Ibrahimi, Halil, Mohammadi, Habibollah, Karimian, Erfan, Mansouri, Arman & Molodi, Farshad, 2024, Two new species of Diamesinae (Diptera: Chironomidae) from the Central Iranian Range and Elburz Mountains (Iran), with new faunistic records for the subfamily, pp. 76-94 in Zootaxa 5537 (1) on pages 82-84, DOI: 10.11646/zootaxa.5537.1.4, http://zenodo.org/record/14239318