Review of subfamily Prodiamesinae (Diptera: Chironomidae) from the Russian Far East and bordering territory Author Makarchenko, Eugenyi A. 0000-0003-2765-8729 Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of Sciences, 100 let Vladivostoku 159, 690022 Vladivostok, Russia & makarchenko @ biosoil. ru; http: // orcid. org / 0000 - 0003 - 2765 - 8729 makarchenko@biosoil.ru Author Semenchenko, Alexander A. 0000-0001-7207-9529 Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far East Branch of the Russian Academy of Sciences, 100 let Vladivostoku 159, 690022 Vladivostok, Russia & semenchenko _ alexander @ mail. ru; https: // orcid. org / 0000 - 0001 - 7207 - 9529 semenchenko_alexander@mail.ru text Zootaxa 2023 2023-07-31 5323 1 1 26 http://dx.doi.org/10.11646/zootaxa.5323.1.1 journal article 59765 10.11646/zootaxa.5323.1.1 196bd6c5-8442-4251-9987-9e8cdeedbfe9 1175-5326 8203829 AABE0C7B-9A90-4CF9-9707-936FF912853D Monodiamesa kamora Makarchenko et Yavorskaya ( Figs. 8–12 ) Monodiamesa kamora Makarchenko et Yavorskaya, 2008: 175 ; Ashe & O’Connor 2009: 324 ; Makarchenko et al. 2018: 3 . Material examined . Russia : 1 adult male ( holotype ), Russian Far East , Khabarovsk Territory , Nikolayevsk District , left bank of Amur River , Kamora River in environs of the city Nikolaevsk-on-Amur , 24.VI 2007 , leg. N. Yavorskaya ; 58 adult males , the same data except Amurskyi District , Bolon Nature Reserve , Simmi River near cordon Cheremshinaya , 25.V 2016 , leg. N. Yavorskaya ; 18 adult males , the same river near cordon Kirpu , 49.507283 N , 136.033228 E , 25.V 2016 , leg. N. Yavorskaya ; 6 adult males , the same river near cordon Vakhtar , 26.V 2016 , leg. N. Yavorskaya ; 24 adult males , the same Nature Reserve, Selgon River , 26.V 2016 , leg. N. Yavorskaya. FIGURES 8–12. Adult male of Monodiamesa kamora Makarchenko et Yavorskaya. 8, 10, hypopygium in dorsal view; 9, hypopygium in ventral view; 11, median volsellae and basal setae; 12, phallapodeme and aedeagal lobe. Scale bars are 50 μm. Comments. The male of this species is described in detail from Amur River basin of the Russian Far East ( Makarchenko & Yavorskaya 2008 ; Makarchenko et al. 2018 ) and therefore below we give only brief diagnosis. Description Adult male . Total length 3.9–5.1 mm . Temporal setae including 2–4 verticals and 6–7 postorbitals. Clypeus with 15–16 setae. Head width/palpal length 1.–1.31. Antenna with 13 flagellomeres, AR 1.75–2.08. Acrostichals absent, dorsocentrals 18–23 (in 1–2 rows), prealars 8, supraalars 1. Scutellum with 41–55 setae. Wing length 3.04–3.16 mm . Anal lobe well developed, roundish and projected forward. LR 1 0.67–0.72, BV 1 2.56–2.65, SV 1 2.49–2.65. Hypopygium ( Figs. 8–12 ). Tergite IX with anal point 72–88 μm long and with 46–49 setae, some of that situated in basal part of anal point ( Figs 8–10 ); laterosternite IX with 12–13 setae. Gonostylus in middle outer part prominent, 152–156 μm long, with megaseta 64 μm long and 1–2 setae nearest 80 μm long ( Fig. 8 ). Gonocoxite 356–368 μm long, shape of superior and inferior volsellae as in Figs 8–10 . Length of superior volsella 92–104 μm, inferior volsella 124–132 μm. Median volsella setae-like, slightly curved 40–44 μm long and situated on darkbrown pedestal 84–104 μm long. Near of median volsella in anterio-ventral part situated seta 52–60 μm long on small tubercle ( Fig. 11 ). Phallapodeme with aedeagal lobe as in Fig. 12 . Pupa and larvae unknown. Distribution. Known only from Amur River basin of the Russian Far East.