Cerodontha (Icteromyza) geniculata (Fallén, 1823)

Figs 12 A – O, 13 A – J

Agromyza geniculata Fallén, 1823: 6.

Agromyza flavogeniculata Roser, 1840: 63; Hendel 1931–1936: 54.

Dizygomyza geniculata: Hendel 1920: 132; Hering 1927: 41.

Dizygomyza (Icteromyza) geniculata: Hendel 1931–1936: 55

Dizygomyza (Poemyza) lunzensis Hering in Lindner 1943: 246; Zlobin 2000: 56.

Phytobia (Icteromyza) geniculata: Frick 1952: 392; Spencer 1963: 329.

Icteromyza geniculata: Nowakowski 1962: 99.

Cerodontha (Icteromyza) geniculata: Nowakowski 1967: 655; 1972: 737; 1973: 38; Spencer 1976: 173; Soós and Papp 1984: 284; Sasakawa and Fan 1985: 281; Dursun et al. 2015: 163; Černý et al. 2018: 25; Zlobin 2000: 56; Doukale Daief et al. 2025: 88.

Specimens examined.

China, Inner Mongolia, Genhe City, Mangui Town, the northern primitive forest region of Greater Khingan Mountains, Aba River Third Branch Line: • 1 ♂ (IMAU), unburned area, Pinus sylvestris var. mongholica, malaise trap 33 (three meters above the ground), 52°22'00.00"N, 121°27'07.00"E, 659 m, 28. VII. 2022, leg. Rui Ma, Qin-Jianrong Liu ; • 1 ♂ (IMAU), unburned area, Pinus sylvestris var. mongholica, malaise trap 34 (one meter above the ground), 52°22'00.00"N, 120°27'07.00"E, 659 m, 28. VII. 2022, leg. Rui Ma, Qin-Jianrong Liu ; • 2 ♀ (IMAU), unburned area, Larix gmelinii, malaise trap 30 (one meter above the ground), 52°18'40.00"N, 121°22'48.60"E, 629 m, 28. VII. 2022, leg. Rui Ma, Qin-Jianrong Liu ; • 1 ♂ (IMAU), burned area in 2018, Pinus sylvestris var. mongholica, malaise trap 35, 52°21'07.00"N, 121°27'05.30"E, 643.3 m, 14. VII. 2022, leg. Li Shi, Zhi-Wei Wang, Rui Ma . DNA sequence number PX 103172 from GenBank.

Diagnosis.

Male (Fig. 12 A – O). Body length 2.0– 2.2 mm; wing length 2.2–2.3 mm. Female (Fig. 13 A – J). Body length 1.8–2.3 mm; wing length 2.3–2.7 mm. Frons yellow. Fronto-orbital plate yellow but darkened in upper half, not projecting above eye in lateral view (Fig. 12 C, D). Mesonotum entirely black with slightly metallic coloration; 1 + 3 dc. acr in four irregular rows, but two rows beyond level of second dc (Fig. 12 E, F). Legs black but all knees yellow. Calypter yellow, margin and fringe dark brown. Wing with ultimate and penultimate sections of M 4 in proportion of 1: 1. Male genitalia (Fig. 12 H – O): surstylus with three or four spines on inner margin; mesophallus and distiphallus wrapped in a layer of membrane in ventral view. Female terminalia (Fig. 13 F – J): spermathecae circular and truncated at basal 1 / 4; duct slightly sclerotized.

Distribution.

Palaearctic: Afghanistan, Albania, Austria, Belgium, Bulgaria, China (Heilongjiang, Inner Mongolia *), Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iran, Israel, Italy, Japan, Kyrgyzstan, Latvia, Lithuania, Mongolia, Morocco (Doukale Daief et al. 2025), Netherlands, Poland, Portugal (Černý et al. 2018), Romania, Russia, Slovakia, Spain, Sweden, Switzerland, Syria (Soós and Papp 1984), The United Kingdom, Turkey (Dursun et al. 2015), Ukraine, Uzbekistan, Tajikistan, Tunisia (Soós and Papp 1984), Turkmenistan; Oriental: China (Taiwan), India; Afrotropical: South Africa.

Remarks.

For more information about this species, refer to Spencer (1976), Nowakowski (1962, 1973), Zlobin (2000), and Černý (2010).