Pseudacteon Coquillett, 1907
|
publication ID |
https://doi.org/ 10.11646/zootaxa.5138.3.1 |
|
publication LSID |
lsid:zoobank.org:pub:B129C042-C4B2-48F6-A7FD-C7EF03E4E26A |
|
DOI |
https://doi.org/10.5281/zenodo.6559520 |
|
persistent identifier |
https://treatment.plazi.org/id/03B2977F-FFB5-FFA5-C6A4-5375FA11FB4B |
|
treatment provided by |
Plazi |
|
scientific name |
Pseudacteon Coquillett |
| status |
|
Genus Pseudacteon Coquillett View in CoL View at ENA
Pseudacteon Coquillett, 1907: 208 View in CoL . Type species: P. crawfordi Coquillett, 1907 .
Diagnosis. Small species. Frons trapezoid, with median furrow, with 2 proclinate and 2–4 reclinate supra-antennal setae, and 4–4–4 frontal setae. Flagellomere 1 oval or conical; arista apical, short. Palpus rod-shaped, sometimes expanded.Anepisternum bare. Scutellum with 2–4 setae. Legs not slender. Fore tibia without isolated setae, fore tarsus normal, tarsomeres in variable ratios. Mid tibia without isolated setae, with a dorsal setal palisade, which is usually not complete. Hind tibia with dorsal setal palisade and posterodorsal cilia. Wing costa short, vein R 2+3 wanting, with a small angulate thickening near apex. Abdomen short, tergites II and VI in male generally a little elongated. Male terminalia small; anal tube long. Female with a sclerotized ovipositor of varied structure.
Distribution. Cosmopolitan.
Key to the species in China
1. Female............................................................................................. 2
- Male.............................................................................................. 19
2. Mid tibia without setal palisade ( Fig. 11D View FIGURES 11 ); oviscape broad and membranous at apex ( Fig. 11F View FIGURES 11 )..... P. formicarum (Verrall) View in CoL
- Mid tibia with setal palisade of variable length.............................................................. 3
3. With 3 pairs of supra-antennal setae ( Fig. 21A View FIGURES 21 ); abdominal sternite VI divided into two oval pieces, each bearing 3–4 setulae ( Fig. 26F View FIGURES 26 )........................................................................ P. hexasetalis Liu et Wang View in CoL
- With 2 pairs of supra-antennal setae....................................................................... 4
4. Setal palisade extending 3/4 (0.71–0.75) length along mid tibia................................................ 5
- Setal palisade extending 1/2–2/3 (0.50–0.70) length along mid tibia............................................. 8
5. Yellow species; apical seta of palpus shorter than maximum width of palpus ( Fig. 18A View FIGURES 18 ); abdominal sternite VI is a fine transverse strip, behind it there is two small sclerotized pieces, bearing 2 setae on it and 2–3 fine setulae outside pieces each side ( Fig.25J View FIGURES 25 )....................................................................... P. shennongjianus View in CoL sp. nov.
- Brown species; apical seta of palpus equal to or longer than maximum width of the palpus........................... 6
6. Fore tarsomere 5 equal to tarsomere 1 ( Fig. 16C View FIGURES 16 ); abdominal sternite VI is a transverse strip, behind it there are only 3–4 long setulae on each side, no sclerotized pieces ( Fig. 25F View FIGURES 25 )........................................ P. obtusatus Liu et Cai View in CoL
- Fore tarsomere 5 longer than tarsomere 1 ( Figs. 5C View FIGURES 5 , 6C View FIGURES 6 ); the setulae on sternite VI very long and about 1/2 length of width of the sternite.......................................................................................... 7
7. Apical seta shorter than maximum width of palpus ( Fig. 5A View FIGURES 5 ); abdominal sternite VI narrow in middle and broad both sides, with 4–5 long, inclinate setae ( Fig. 24F View FIGURES 24 )...................................................... P. inticlinatus View in CoL sp. nov.
- Apical seta longer than maximum width of palpus ( Fig. 6A View FIGURES 6 ); abdominal sternite VI is a transverse strip, with 2–3 very long setulae each side ( Figs. 6F View FIGURES 6 , 24H View FIGURES 24 )......................................... P. setipalpatus Disney et Michailovskaya View in CoL
8. Apical seta of palpus as long as adjacent setulae ( Fig. 10A View FIGURES 10 ); setal palisade extending 1/2 (0.5–0.6) length along mid tibia ( Fig. 10D View FIGURES 10 ); abdominal sternite VI is a transverse band, with 2 long and 2 short setulae ( Fig. 25B View FIGURES 25 )............................................................................................... P. rudisetosus Disney et Michailovskaya View in CoL
- Apical seta of palpus clearly longer than adjacent setulae..................................................... 9
9. Apical seta of palpus shorter than maximum width of palpus ( Fig. 19A View FIGURES 19 )......................................... 10
- Apical seta of palpus longer than maximum width of palpus ( Fig. 2A View FIGURES 2 ).......................................... 12
10. Abdominal sternite VI trapezoid, with 8–10 long setae at rear margin ( Fig. 24D View FIGURES 24 )............. P. trapeziformis Zhang et Liu View in CoL
- Abdominal sternite VI narrow in middle part, with 3–4 long setae each side...................................... 11
11. Second section of wing vein costa short and with 3 dorsal setulae ( Fig. 19B View FIGURES 19 ); abdominal sternite VI triangular each side, with 4 long setae ( Fig. 26B View FIGURES 26 )............................................................... P. yunnanensis View in CoL sp. nov.
- Second section of wing vein costa long, with 6 dorsal setulae ( Fig. 17A View FIGURES 17 ); abdominal sternite VI bifurcate, each of lower branch with 3 long setae ( Fig. 25H View FIGURES 25 )............................................................ P. linzhiensis View in CoL sp. nov.
12. Abdominal sternite VI long and wide, with 4 pin-shaped setae ( Fig. 1F View FIGURES 1 )......................................... 13
- Abdominal sternite VI short, and thinner in middle part...................................................... 14
13. Fore tarsomere 5 longer than tarsomere 1 ( Fig. 1C View FIGURES 1 ); all supra-antennal setae as strong as adjacent frontal setae ( Fig. 1A View FIGURES 1 ); 4 pinshaped setae of sternite VI thicker and shorter ( Figs. 1F View FIGURES 1 , 24B View FIGURES 24 )............................... P. quadrisetalis Liu et Cai View in CoL
- Fore tarsomere 5 shorter than tarsomere 1 ( Fig. 2C View FIGURES 2 ); upper supra-antennal setae shorter than adjacent frontal setae ( Fig. 2A View FIGURES 2 ); 4 pin-shaped setae of sternite VI a little thinner and longer ( Fig. 2F View FIGURES 2 )............................ P. robustisetosus View in CoL sp. nov.
14. Abdominal sternite VI divided into two pieces............................................................. 15
- Abdominal sternite VI is a transverse strip................................................................ 18
15. Abdominal sternite VI in two boot-shaped pieces ( Fig. 26D View FIGURES 26 ); fore tarsomere 5 longer than tarsomere 1 ( Fig. 20C View FIGURES 20 ).......................................................................................... P. calceoliformis View in CoL sp. nov.
- Abdominal sternite VI not boot-shaped................................................................... 16
16. Frons with 12–16 setulae ( Fig. 9A View FIGURES 9 ); second section of vein costa short, with 3 dorsal cilia ( Fig. 9B View FIGURES 9 ); abdominal sternite VI divided into two oval pieces, each with 4–5 setulae ( Fig. 24J View FIGURES 24 ); oviscape with membrane apex ( Fig. 9F View FIGURES 9 ).................................................................................................... P. reticulatus View in CoL sp. nov.
- Frons with more than 20 frontal setulae; oviscape without membrane apex....................................... 17
17. Abdominal sternite VI divided into two oval pieces, each with 3–4 setulae ( Fig. 8F View FIGURES 8 ); oviscape with 15 irregular minute setulae ( Fig. 8G View FIGURES 8 )........................................................... P. botulpalpatus Disney et Michailovskaya View in CoL
- Abdominal sternite VI divided into two irregular pieces, each with 2 long and 2–3 short setulae ( Fig. 25D View FIGURES 25 ); oviscape with 12 irregular minute setulae ( Fig. 14F View FIGURES 14 ).................................................... P. pullum Michailovskaya View in CoL
18. Brown species; setal palisade 1/2 length of mid tibia ( Fig. 22D View FIGURES 22 ); abdominal sternite VI short and wide, behind it there are 2 long setae and 0–1 minute setulae ( Fig. 26H View FIGURES 26 )................................................. P. tianmuensis View in CoL sp. nov.
- Yellow species; setal palisade 2/3 length of mid tibia ( Fig. 23D View FIGURES 23 ); abdominal sternite VI short and wide, with 2 long setae and 0–1 minute setulae ( Fig. 26J View FIGURES 26 )........................................................... P. parviflavus View in CoL sp. nov.
19. Abdominal tergites with very long setulae, as long as those on anal tube ( Fig. 13F View FIGURES 13 ); fore tarsomere 5 shorter than tarsomere 1 ( Fig. 13C View FIGURES 13 )............................................................... P. setosus Disney et Michailovskaya View in CoL
- Abdominal tergites with very short setulae, shorter than those on anal tube....................................... 20
20. Setal palisade of mid tibia wanting ( Fig. 12D View FIGURES 12 )............................................. P. formicarum (Verrall) View in CoL
- Setal palisade of mid tibia present....................................................................... 21
21. Setal palisade extends 1/2 length along mid tibia ( Fig. 15D View FIGURES 15 ); second section of vein costa short, with 3 dorsal setulae(15B)................................................................................. P. pullum Michailovskaya View in CoL
- Setal palisade more than 2/3 length along mid tibia ( Fig. 4D View FIGURES 4 ); second section of vein costa long, with 4 dorsal setulae..... 22
22. Apical seta less than 2x length of maximum width of palpus ( Fig. 4A View FIGURES 4 ); fore tarsomere 5 longer than tarsomere 1 ( Fig.4C View FIGURES 4 )................................................................................ P. trapeziformis Zhang et Liu View in CoL
- Apical seta more than 2x length of maximum width of palpus ( Fig. 7A View FIGURES 7 ); fore tarsomere 5 equal to tarsomere 1 ( Fig. 7C View FIGURES 7 )....................................................................... P. setipalpatus Disney et Michailovskaya View in CoL
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
|
Kingdom |
|
|
Phylum |
|
|
Class |
|
|
Order |
|
|
Family |
Pseudacteon Coquillett
| Liu, Guang-Chun & Disney, R. Henry L. 2022 |
Pseudacteon
| Coquillett, D. W. 1907: 208 |