Systematics of Phasia Latreille (Diptera: Tachinidae) Author Sun, Xuekui Author Marshall, Stephen A. text Zootaxa 2003 2003-08-29 276 1 1 320 https://biotaxa.org/Zootaxa/article/view/zootaxa.276.1.1 journal article 10.11646/zootaxa.276.1.1 1175­5334 5019510 4177F6E7-B276-438E-8E49-EE5ECD84D351 Key to species of the Phasia hemiptera species­group (Females of Phasia godfreyi , Phasia transvaalensis , and Phasia yunnanica are unknown.) 1. Males ............................................................................................................................ 2 ­ Females ....................................................................................................................... 22 2. Mesoscutum with a distinct golden pruinose spot, at least on the median postsutural part; tergite V with V­shaped golden pruinosity posterolaterally ................................ 3 Mesoscutum evenly pruinose, or with vitta­like pattern; tergite V without such pruinosity ..................................................................................................................................... 4 3. Lower margin of face strongly projecting, pruinose spot usually limited to postsutural scutum; surstylus straight; distiphallus swollen, not branched ...................................... ....................................................................................... P. aurulans ( Meigen, 1824 ) ­ Lower margin of face slightly projecting, pruinose spot usually covering most of mesonotum, two broad black vittae across suture; surstylus strongly bent upward; distiphallus branched ............................................................ P. aurigera ( Egger, 1860 ) 4. 1+1 or 1+2 katepisternal setae ...................................................................................... 5 ­ 0+0 or 0+1 katepisternal seta ..................................................................................... 13 5. Abdominal tergites strongly shining, pruinosity absent; syncercus slender, surstylus strongly bent upward (Fig. I­63) ........................ P. takanoi (Draber­Mo ń ko, 1965) ­ Abdominal tergites at least thinly grey pruinose; syncercus short, surstylus not strong bent upward .................................................................................................................. 6 6. Surstylus straight or bent downward posteriorly .......................................................... 7 ­ Surstylus strongly bent upward posteriorly ................................................................ 10 7. Abdominal tergites with orange­yellow area on tergites I+II, III and IV .................... 8 ­ Abdominal tergites totally black .................................................................................. 9 8. Phallus about 1.5 times as long as hypandrium; syncercus slender, almost as long as surstylus; pregonite well developed ..................... P. zimini (Draber­Mo ń ko, 1965) ­ Phallus over 2 times as long as hypandrium; syncercus much shorter than surstylus; pregonite even apically, reduced ....................... P. transvaalensis Sun , new species 9. Syncercus deeply notched posteriorly; M meeting R 4+5 at acute angle.......................... ..................................................................................... P. grandis ( Coquillett, 1897 ) ­ Syncercus not or shallowly notched posteriorly; M meeting R 4+5 almost at right angle ........................................................................ P. diversa ( Coquillett, 1897 ) (in part) 10. Hind tarsi with dense fine golden yellow hairs ventrally ............................................... .................................................................................. P. yunnanica Sun , new species ­ Hind tarsi without such hairs ...................................................................................... 11 11. Distiphallus not branched ............................................... P. kudoi Sun , new species ­ Distiphallus branched ................................................................................................. 12 12. Dorsolateral process of distiphallus with two pointed branches .................................. .. .......................................................................... P. grazynae (Draber­Mo ń ko, 1965) ­ Dorsolateral process of distiphallus not branched posteriorly ....................................... ............................................................................... P . albopunctata (Baranov, 1935) 13. All fronto­orbital setae yellow .......................................... P. piceipes ( Wulp, 1892 ) ­ Fronto­orbital setae black, or with only a few yellow ................................................14 14. Abdomen with yellow or dark yellow area; M meeting R 4+5 at acute angle .............. 15 ­ Abdomen totally black; M meeting R 4+5 almost at right angle. ................................. 17 15. Lower margin of face projecting; pleuron of thorax without dense yellow hairs ........... .................................................................................. P. japanensis Sun , new species ­ Lower margin of face perpendicular; pleuron of thorax usually with dense yellow hairs ..................................................................................................................................... 16 16. Frons wider than ocellar triangle; pregonite needle­like, distiphallus narrow posteriorly; Oriental species ......................................... P. godfreyi (Draber­Mo ń ko, 1964) ­ Frons as wide as ocellar triangle; pregonite wide, distiphallus wide posteriorly; Palaearctic species ............................................................ P. hemiptera ( Fabricius 1794 ) 17. Phallus not haired; abdomen always uniformly thinly grey pruinose except syntergite I+II; male terminalia as Fig. I­17 .................... P. diversa ( Coquillett, 1897 ) (in part) ­ Phallus haired; tergites and terminalia not as above .................................................. 18 18. Abdominal tergites clearly transversely grey pruinose; fronto­orbital plate yellow pruinose; wing not enlarged ........................................ P. subopaca ( Coquillett, 1897 ) ­ Abdominal tergites shining, or not pruinose as above; fronto­orbital plate grey or yellow pruinose; wing enlarged or not ............................................................................ 19 19. Syncercus deeply notched posteriorly (semicircular); base of pregonite narrow, with sharp point, longer than postgonite; Palaearctic species .. P. obesa ( Fabricius 1798 ) ­ Syncercus relatively shallowly notched posteriorly; base of pregonite broad, not longer than postgonite; New World species ................................................................ 20 20. Distiphallus distally expanded into short, broad bilobed sclerite; ventrolateral process with two inverted spines; wing pictured on basal 1/2 only .. P. nigrens ( Wulp, 1892 ) ­ Distiphallus not strongly expanded at apex; wing varied in colour pattern ............... 21 21. Ventrolateral process of distiphallus straight, not bent; western Nearctic species ......... .............................................................................. P. aeneoventris ( Williston, 1886 ) ­ Ventrolateral process of distiphallus bent, and hook­like; eastern Nearctic species....... ................................................................................ P. robertsonii ( Townsend, 1891 ) 22. Sternite VII bent, apex directed ventrally .................................................................. 23 ­ Sternite VII straight, or bent but apex directed dorsally ............................................ 26 23. Ovipositor bent, apex slightly or strongly directed dorsally ...................................... 24 ­ Ovipositor bent, apex slightly or strongly directed ventrally ......................................... ...................................... P. aurulans ( Meigen, 1824 ) / P. kudoi Sun , new species 24. Lateral angles of sternite VII bent downward into triangles posteriorly ........................ .................................................................................. P. japanensis Sun , new species ­ Sternite VII not as above ............................................................................................ 25 25. Legs, at least tibia, yellow or brown; New World species .. P. piceipes ( Wulp, 1892 ) ­ Legs black; Palaearctic species ............................ P. zimini (Draber­Mo ń ko, 1965) 26. Thorax with dense orange yellow or brown hairs; scutellum yellow or brown ............. .................................................................................. P. hemiptera ( Fabricius, 1794 ) ­ Thorax with sparse black or yellow hairs; scutellum black ....................................... 27 27. Posterior margin of sternite VII rounded or linear in ventral view(as in Figs.I­17.6,I­40.6) ..................................................................................................................................... 28 ­ Posterior margin of sternite VII pointed in ventral view (as in Figs. I­1.6, I­61.6) .. 30 28. Sternite VII short and wide, boat­like .......................... P. diversa ( Coquillett, 1897 ) ­ Sternite VII slender, not boat­like .............................................................................. 29 29. Apex of sternite VII spoon­like, bent dorsally .... P. takanoi (Draber­Mo ń ko, 1965) ­ Apex of sternite VII abruptly broadened, tubular, straight.. P. nigrens ( Wulp, 1892 ) 30. Lower margin of face strongly projecting, visible in profile; 1 katepisternal seta .... 31 ­ Lower margin of face perpendicular, or slightly projecting; 2 katepisternal setae ... 34 31. Abdomen silvery pruinose, always with black longitudinal vitta; abdomen with black transverse vittae posteriorly(at least tergite III);sternite VII thin, triangular, apex pointed .................................................................................. P. subopaca ( Coquillett, 1897 ) ­ Abdomen black, shining purple, or grey (or yellowish grey) pruinose; if pruinosity present,blacklongitudinalvittaandtransversevittaabsentorindistinct;SterniteVIItapered ..................................................................................................................................... 32 32. Distribution Palaearctic .................................................. P. obesa ( Fabricius, 1798 ) ­ Distribution New World ............................................................................................. 33 33. Distribution eastern Nearctic ................................. P . robertsonii ( Townsend, 1891 ) ­ Distribution western Nearctic and Neotropical ... P. aeneoventris ( Williston, 1886 ) 34. Sternite VII broad and short, as long as or slightly longer than sternite VI (visible part); abdomen with orange yellow area (especially on syntergite I+II, tergite III) ....... ........................................................................................... P. aurigera ( Egger, 1860 ) ­ Sternite VII distinctly narrow and long;abdomen black or with indistinct dark yellow area. .................................................................................................................................... 35 35. Ovipositor (segment VIII) much longer than sternite VIII ............................................ ........................................................................... P. grazynae (Draber­Mo ń ko, 1965) ? ­ Ovipositor (segment VIII) much shorter than sternite VIII ....................................... 36 36. Gena greyish yellow pruinose; sternite VII bent upward gradually; Nearctic species .. .................................................................................... P. grandis ( Coquillett, 1897 ) ­ Gena grey pruinose; sternite VII bent upward abruptly; Palaearctic species.................. ............................................................................... P. albopunctata (Baranov, 1935)