ARGIDAE

Basov, S. A., 2024, Illustrated key to the Palaearctic genera of the sawfly family Argidae (Hymenoptera: Symphyta), with taxonomic notes, Russian Entomological Journal 33 (4), pp. 466-476 : 467-469

KEY TO THE PALAEARCTIC GENERA OF ARGIDAE

1. Cell R of fore wing closed ( Figs 2, 4). Vein Sc present ( Fig. 12). Antenna of males simple ( Fig. 5) ................... 2

– Cell R of fore wing open ( Fig. 3). Vein Sc absent or incomplete ( Fig. 13). Antenna of male bifurcate ( Fig. 6) ( Sterictiphorinae ) .................................................................... 10

2. Middle and often also hind tibiae with preapical spurs ( Fig. 7) ( Arginae , part) .................................................. 3

– All tibiae without preapical spurs ( Fig. 8) ....................... 5

3. Cell 2A of fore wing open ( Fig. 9) ..................................... ......................................... Pseudarge Gussakovskij, 1935

– Cell 2A of fore wing closed ( Fig. 10) ............................... 4

4. Abdominal tergites of males and females without long medial process or triangular swelling. Hind tibia always with preapical spur .................................... Arge Schrank, 1802

– Fifth abdominal tergite of male with long medial process ( Fig. 17), in females with slightly noticeable triangular swelling and inconspicuous median groove on tergites 4–6 ( Fig. 18). Hind tibia with or without preapical spur ........ ........................................................... Spinarge Wei, 1998

5. Cell 2A of fore wing open or absent, vein 2A+3A barely distinguishable or without clear apex (as in Figs 9, 11) ( Arginae , part) ..................................................................... 6

– Cell 2A of fore wing closed, vein 2A+3A distinctly sclerotised (as in Fig. 10) (Athermatinae) ............................... 7

6. Fore wing with three cells Rs. Vein 2r–m absent ( Fig. 4). Face below base of antenna not convex ( Fig. 14) ........... ................................................... Kokujewia Konow, 1902

– Fore wing with four cells Rs. Vein 2r–m present (as in Fig 2). Face below base of antenna strongly convex ( Fig. 15) ... ............................................. Asiarge Gussakovskij, 1935

7. Vein B of fore wing joins vein R well before (longer than vein Sc) junction point of vein M (as in Fig 13) ........... 8

– Veins B and M of fore wing join up at same point on vein R (as in Fig. 12) ................................................................. 9

8. Hind tibia and apical spurs flattened; head strongly enlarged behind eyes in dorsal view (see fig. 1I in Luo et al., 2019) ......................................... Athermantus W.F. Kirby, 1882

–. Hind tibia and spurs non flattened (as in Figs 7, 8); head not enlarged behind eyes in dorsal view (as in Fig. 16) ........ ....................................................... Cibdela Konow, 1899

9. Width of head only slightly less than width of thorax in dorsal view (see Figs 38, 43, 45, 49 in Liston et al., 2017). Sheath obtuse in lateral view, width of its base in dorsal view almost 2.0 times its length (see Figs 4, 5 in Liston et al., 2017) .............................. Pampsilota Konow, 1899

– Width of head considerably less than width of thorax in dorsal view ( Fig. 16). Sheath with acute apex in lateral view ( Fig. 24), width of its base in dorsal view equal to or slightly larger than length ( Fig. 23) .......................................... ........................................... Tanyphatnidea Rohwer, 1912

10. Vein Sc of fore wing present (as in Fig. 12, also see Fig. 1 in Wei, 1997). Labial palps with 3 segments, maxillary palps with 5 segments. Right mandible simple, without basal tooth .................................... Ortasiceros Wei, 1997

– Vein Sc of fore wing absent ( Fig. 13). Labial palps with 4 segments, maxillary palps with 6 segments ( Fig. 19). Right mandible with basal tooth ( Fig. 21) ................... 11

11. Cell A of hind wing closed ( Figs 22, 23) ..................... 12

– Cell A of hind wing widely open (Fig. 26) ..................... 14

12. Veins B and M of fore wing join up at same point on vein R (as in Fig. 12, also see Fig. 1C in Choi et al., 2015). Claws with angular basal lobe (see Fig. 2C in Choi et al., 2015). Process of cell A of hind wing almost 3.0 times its width (see Fig. 1C in Choi e t al., 2015) ..................................... ................................................ Yasumatsua Togashi, 1970

– Vein B of fore wing joins vein R well before (longer than vein Sc) junction point of vein M (as in Fig. 13). Claws without angular basal lobe ( Fig. 20). Petiole of cell A of hind wing less than 3.0 times its width ( Figs 22, 23) ........................................................ 13

13. Cell 2A of fore wing open (as in Fig. 11). Petiole of cell A of hind wing 2.0 times longer than its width ( Fig. 23) .... ................................................. Aprosthema Konow, 1899

– Cell 2A of fore wing closed (as in Fig. 10). Petiole of cell A of hind wing shorter than its width ( Fig. 22) ................... ............................................. Sterictiphora Billberg, 1820

14. Veins B and M of fore wing join up at same point on vein R (as in Fig. 12) ....................... Aproceros Malaise, 1931

– Vein B of fore wing joins vein R well before (longer than vein Sc) junction point of vein M (as in Fig. 13) ......... 15

15. Cell 2A of fore wing absent (as in Fig. 11) ..................... ............................. Pseudaprosthema Gussakovskij, 1935

– Cell 2A of fore wing closed (as in Fig. 10) ......................... .............................................. Schizocerella Forsius, 1927

Notes on the genera of Argidae known from the Palaearctic region (in alphabetical order)