Iteaphila macquarti

Sinclair, Bradley J. & Shamshev, Igor V., 2012, 3561, Zootaxa 3561, pp. 1-61 : 55-56

Key to species of the Iteaphila macquarti group from the Palaearctic and Oriental regions

1 Antennal stylus long, nearly half of postpedicel length, lacking apical bristle. Scutellum with 2–3 pairs of setae. Basal costal bristle present. Epandrial lamella with additional lobe ( I. setosa group)................ See Shamshev and Sinclair (2009)

– Antennal stylus very short relative to postpedicel length, bristle-tipped. Scutellum at least with 4 pairs of setae. Basal costal bristle absent. Epandrial lobe lacking additional lobe ( Fig. 6E) ( I. macquarti group)................................ 2

2 Male ............................................................................................... 3

– Female (unknown in I. rasnitsyni , I. saigusai , I. cirrata ).................................................... 13

3 Antennal segment 9 very short (shorter than wide), stylus often weakly distinguishable from apex of postpedicel......... 4

– Antennal segment 9 longer (at least as long as wide), stylus distinct from apex of postpedicel........................ 9

4 Abdomen covered with pale bristly hairs................................................................... 5

– Abdomen covered with black to brown bristly hairs.......................................................... 6

5 Males dichoptic. Antenna with postpedicel very long (about 7.0 times longer than wide), covered with long, erect microtrichia (Taiwan) .......................................................................... I. taiwanensis sp. nov.

– Males holoptic. Antenna with postpedicel shorter (about 4.0 times longer than wide), covered with unmodified microtrichia (South Russian Far East)............................................................... I. rasnitsyni sp. nov.

6 Phallus loop-like, constricted about middle ( Figs. 4D, 8B)..................................................... 7

– Phallus evenly curved, uniform throughout ( Figs. 6D, 11B).................................................... 8

7 Epandrial lobe viewed laterally subrectangular, rounded apically ( Fig. 8B). Katepisternum with shiny spot on middle (Holarctic, Oriental)........................................................................ I. nitidula Zetterstedt

– Epandrial lobe viewed laterally subtriangular, pointed apically ( Fig. 4D). Katepisternum finely pollinose ( Russia, western Nearctic)...................................................................... I. cirrata Shamshev sp. nov.

8 Phallus long, thin, produced downwards far beyond epandrium ( Fig. 6D) (Europe)................ I. furcata (Zetterstedt)

– Phallus short, thickened in apical part, not produced downwards beyond epandrium ( Fig. 11B) ( Japan).... I. saigusai sp. nov.

9 Postpedicel short, about 2.5 times as long as wide. Scutellum with 5–6 pairs of setae. Smaller, with wing length about 2.5 mm (western Nearctic, Russia)................................................................. I. pumila sp. nov.

– Postpedicel long, about 4.0 times as long as wide. Scutellum with at least 7–8 pairs of setae. Larger, with wing length at least about 3.5 mm ....................................................................................... 10

10 Acrostichal setae arranged in 2 irregular rows. Wing finely infuscate........................................... 11

– Acrostichal setae at least 3–4 serial. Wing distinctly brownish infuscate........................................ 12

11 Antennal scape and pedicel with long setae. Proboscis shorter, labium somewhat more than half height of head. Oblique hypoproct process present ( Nepal)........................................................... I. nepalensis sp. nov.

– Antennal scape and pedicel with short setae. Proboscis very long and slender, nearly 2.0 times as long as head height ( Fig. 2F). Oblique hypoproct process absent ( Kazakhstan)............................................... I. chvalai sp. nov.

12 Acrostichal and dorsocentral setae long and more numerous, multiserial. Katepisternum densely pollinose (Holarctic)........................................................................................ I. macquarti Zetterstedt

– Acrostichal and dorsocentral setae short and less numerous, the latter 1–2-serial. Katepisternum with shiny or polished spot on middle (western Nearctic, Japan)......................................................... I. orchestris Melander

13 Antennal segment 9 very short (shorter than wide), stylus not distinguishable from apex of postpedicel................. 14

– Antennal segment 9 longer (at least as long as wide), stylus distinct from apex of postpedicel........................ 16

14 Thoracic pleuron entirely finely pollinose................................................. I. furcata (Zetterstedt)

– Thoracic pleuron with shining spot(s)..................................................................... 15

15 Katepisternum with large shiny spot on middle. Abdomen covered with moderately pale yellow, hair-like setae............................................................................................... I. taiwanensis sp. nov.

– Anepisternum and katepisternum largely shiny or polished. Abdomen covered with very short, brownish hair-like setae........................................................................................ I. nitidula Zetterstedt

16 Postpedicel short, about 2.5 times as long as wide ( Fig. 2B). Scutellum with 5–6 pairs of setae. Smaller, with wing length about 2.5 mm ............................................................................... I. pumila sp. nov.

– Postpedicel long, about 4.0 times as long as wide. Scutellum with at least 7–8 pairs of setae. Larger, with wing length at least about 3.5 mm ...................................................................................... 17

17 Halter pale, whitish to yellow......................................................................... 18

– Halter dark......................................................................................... 19

18 Dorsocentral setae multiserial anteriorly.................................................. I. nepalensis sp. nov.

– Dorsocentral setae uniserial throughout...................................................... I. chvalai sp. nov.

19 Clouding about veins; R 4+5 usually branched at or proximal to end of R 2+3 ( Fig. 2A). Katepisternum greyish pollinose; scutum viewed dorsally yellowish brown, viewed anteriorly narrowly brownish down acrostichal and dorsocentrals............................................................................................... I. macquarti Zetterstedt

– No distinct clouding about veins; R 4+5 usually branched at or distal to end of R 2+3. Katepisternum with shiny or polished spot on middle; scutum viewed dorsally dark brown, viewed anteriorly more greyish but with broad dark brown vitta down acrostichals and similar narrow vitta down dorsocentrals......................................... I. orchestris Melander