World revision of Iteaphila with unbranched radial vein (Diptera: Empidoidea: Iteaphilidae) Author Sinclair, Bradley J. 0000-0001-6413-1606 bradley.sinclair@canada.ca Author Shamshev, Igor V. 0000-0001-6413-1606 bradley.sinclair@canada.ca text Zootaxa 2021 2021-05-07 4968 1 1 89 journal article 6423 10.11646/zootaxa.4968.1.1 8f948bf9-6e6b-4167-aa50-bf648409d0e5 1175-5326 4745566 09F4CC3C-879C-4FCD-94D5-9ADE4A81EFAC Key to Iteaphila with unbranched radial vein (R 4+5) from the Palaearctic Region 1 Male [unknown for I. caelebs ].......................................................................... 2 - Female [unknown for I. falki sp. nov. , I. kyrgyzstanensis sp. nov. , I. sakhalinensis sp. nov. , I. aktruensis sp. nov. ]........ 16 2 Eyes dichoptic....................................................................................... 3 - Eyes holoptic........................................................................................ 4 3 Stylus not much longer than wide; terminalia almost entirely yellow ( Fig. 13 ).................... I. dichoptica sp. nov. - Stylus much longer than wide; terminalia very dark..................................... I. kyrgyzstanensis sp. nov. 4 Epandrium oval, with broad dorsal bridge connecting lamellae and narrow, dorsally directed surstylus; hypandrium clothed with short shiny projections ( Fig. 21 ).................................................... I. beringiensis sp. nov. - Epandrium narrowed, longer than wide, prolonged posteriorly, with narrow dorsal bridge and posteriorly directed surstylus; hypandrium not clothed with short shiny projections......................................................... 5 5 Surstylus held erect to epandrium ( Figs 45 , 56 , 61 , 75 )........................................................ 6 - Surstylus directed posteriorly ( Figs 29, 30 )................................................................. 9 6 Surstylus very narrow and shiny ( Figs 61 , 75 )............................................................... 7 - Surstylus broader, round and narrow apically ( Figs 45 , 56 )..................................................... 8 7 Surstylus hook-like, shorter than cercus ( Fig. 75 )............................................ I. zontaki (Nowicki) - Surstylus elongate and straight, as long as cercus ( Fig. 61 )...................................... I. miranda sp. nov. 8 Surstylus tapered to narrow point ( Fig. 56 ); cercus broad with posterior, subapical lobe ( Fig. 57 ); phallus slightly arched and broad at apex........................................................................... I. spinosa sp. nov. - Surstylus digitiform with rounded tip; cercus narrow without posterior, subapical lobe; phallus strongly arched and slender at apex ( Fig. 45 ).......................................................................... I. gracilis sp. nov. 9 Anepisternum and katepisternum with shiny spot on middle.................................................. 10 - Anepisternum and katepisternum greyish pollinose.......................................................... 11 10 Apex of phallus narrowed, directed horizontally and slightly sinuous; hypoproct process elongate; hypandrium with subapical subtriangular projection ( Fig. 29 )........................................................... I. bartaki sp. nov. - Apex of phallus not narrowed, evenly curved ventrally; hypoproct process short; hypandrium evenly curved subapically ( Fig. 30 )..................................................................................... I. falki sp. nov. 11 Phallic guide long, produced beyond epandrium as far as phallus, well visible in situ ( Figs 32 , 53 ).................... 12 - Phallic guide short, not produced beyond epandrium, not visible in situ ( Figs 60 , 67 )............................... 13 12 Tibiae and usually halteres yellowish; cercus short, as long as surstylus; phallic guide subequal in width to phallus ( Fig. 53 )..................................................................................... I. luteitibia sp. nov. - Tibiae and halteres dark; cercus long, longer than surstylus; phallic guide broader than phallus ( Fig. 32 ).. I. ribesii (Becker) 13 Phallus bent subapically nearly 90°, directed straight before arched apically ( Fig. 67 )............ I. oedalina (Zetterstedt) - Phallus not bent subapically nearly 90°, gradually arched and curved apically ( Figs 59, 60 , 70 )....................... 14 14 Surstylus broad with rounded apex; phallus often projected well beyond epandrium ( Fig. 60 )............ I. incus sp. nov. - Surstylus narrow, hook-like; phallus arched along margin of epandrium ( Figs 59 , 70 ).............................. 15 15 Phallus prolonged, arched to hypandrium ( Fig. 59 ).......................................... I. aktruensis sp. nov. - Phallus not prolonged, arched to apex of epandrium ( Fig. 70 )............................... I. sakhalinensis sp. nov. 16 Halteres pale........................................................................................ 17 - Halteres dark........................................................................................ 19 17 Antennal stylus (excluding apical sensillum) distinctly longer than wide........... I. spinosa sp. nov. , I. luteitibia sp. nov. - Antennal stylus (excluding apical sensillum) about as long as wide............................................. 18 18 Scutum viewed anteriorly subshiny, finely pollinose......................................... I. dichoptica sp. nov. - Scutum viewed anteriorly densely pollinose...... I. gracilis sp. nov. , I . caelebs (Becker) , I. oedalina (Zetterstedt) [in part] 19 Antennal stylus (excluding apical sensillum) about as long as wide............................................. 20 - Antennal stylus (excluding apical sensillum) distinctly longer than wide......................................... 21 20 Anepisternum and katepisternum shiny...................................................... I. bartaki sp. nov. - Anepisternum and katepisternum dull with pruinescence................................................................................................. I. zontaki (Nowicki) , I. oedalina (Zetterstedt) [in part], I. incus sp. nov. 21 Sternite 8 shiny..................................................................... I. beringiensis sp. nov. - Sternite 8 with pruinescence............................................................... I. ribesii (Becker)