Trichromothrips

Masumoto, Masami & Okajima, Shûji, 2005, Taiwan, with descriptions of four new species and a review of the Trichromothrips group of genera, Zootaxa 1082, pp. 1-27 : 5-6

Key to genera of Trichromothrips genus­group

1. Metathoracic furca elongated and reaching to mesothorax. ........ Trachynotothrips

­. Metathoracic furca normal and not reaching to mesothorax. ................................. 2

2(1) Head, pronotum, and lateral and median areas of abdominal terga with closely spaced lines of sculpture; abdominal terga with about five setae in irregular or regular transverse row in lateral area........................................................... Octothrips

­. Head and abdominal terga without such lines of sculpture, sometime pronotum with such lines of sculpture; abdominal tergal chaetotaxy different ...................... 3

3(2) Ovipositor reduced, very weak and without teeth; antennal segments III and IV with simple sense­cones ........................................................... Takethrips (in part)

­. Ovipositor distinctly developed, with teeth; antennal segments III and IV with forked or simple sense­cones.................................................................................. 4

4(3) Antennal segments III and IV with simple sense­cones......................................... 5

­. Antennal segment IV with forked sense­cone. ....................................................... 6

5(4) Prosternal ferna divided; pronotum with posteroangular setae similar to posteromarginal setae ........................................................................................ Takethrips

­. Prosternal ferna not divided; pronotum with posteroangular setae much longer than posteromarginal setae................................................... Yoshinothrips (in part)

6(4) Antennal segment III with simple sense­cone; abdominal terga III to VII each with 12 setae ............................................................................................ Yoshinothrips

­. Antennal segment III with forked sense­cone; abdominal terga III to VII each with 10 setae at most....................................................................................................... 7

7(6) Mesothoracic sternopleural suture present although not reaching anterior margin; abdominal tergum VIII with paired ctenidium­like microtrichial rows mesad of spiracle ................................................................................................... Cricothrips

­. Mesothoracic sternopleural suture absent; abdominal tergum VIII without such microtrichial rows................................................................................................... 8

8(7) Pronotum with a pair of elongate feather­like posteroangular setae.. Pteridothrips

­. Pronotum without such posteroangular setae. ........................................................ 9

9(8) Ocellar setae I present (more than two pairs of anteocellar setae). ...................... 10

­. Ocellar setae I absent (only one pair of anteocellar setae). .................................. 11

10(9) Pronotum with closely spaced transverse striae; prominent body setae slender in both sexes...................................................................................... Neocorynothrips

­. Pronotum with reticulations bearing internal wrinkles; prominent body and fore wing setae fan­shaped in female but slender in male .................. Watanabeothrips

11(9) Prosternal ferna not divided at middle.................................................................. 12

­. Prosternal ferna divided at middle........................................................................ 13

12(11) Pronotum with one pair of long posteroangular setae; fore wings with costal setae greatly elongate, about 2.3–3.3 times as long as width of wing at middle ............... .............................................................................................................. Laplothrips

­. Pronotum with two pairs of long posteroangular setae or with no long setae; fore wings with costal setae less than 1.5 times as long as width of wing at middle....... ...................................................................................................... Trichromothrips

13(11) Pronotum almost smooth, without closely spaced striae. .................... Okajimaella

­. Pronotum with distinct closely spaced transverse striae....................................... 14

14(13) Pronotum rectangular, with posteroangular setae longer than posteromarginal setae; metascutal sculpture transverse ...................................................... Paithrips

­. Pronotum trapezoidal, with posteroangular setae almost as long as posteromarginal setae; metascutal sculpture longitudinal .................................... Simulothrips