1 Coxal area smooth......................................................................................................... 2
Coxal area with short lines or granules......................................................................... 8
2 Empodium 7 rayed ....................................................................... Tetra yushania Huang
Empodium 4 rayed........................................................................................................ 3
3 Setae h 1 absent .......................................................................... Tetra intermedia Huang
Setae h 1 present............................................................................................................. 4
4 Coxal sternal line absent ......................................................... Tetra similisforca Huang
Coxal sternal line present.............................................................................................. 5
5 Shield design without median line .................................................... Tetra toona Huang
Shield design with median line..................................................................................... 6
6 Shield design with median line 1 / 3 anterior, female genital coverflap with 8 to 10 lon gitudinal ridges ........................................................ Tetra guiyangensis Kuang & Hong
Shield design with median line 1 / 3 at base, female genital coverflap with more than 10 longitudinal ridges......................................................................................................... 7
7 Femur with two longitudinal lines, female genital coverflap with 12 to 14 longitudinal ridges, shield design network ...................................... Tetra polygoni Wei, Chen & Xie
Femur smooth, female genital coverflap with 10 to 12 longitudinal ridges, shield design only with median and admedian lines connected at basal 1 / 3............................. ................................................................................. Tetra clerodendri Wei, Chen & Xie
8 Coxal area with granules............................................................................................... 9
Coxal area with short lines.......................................................................................... 10
9 Female genital coverflap smooth, empodium 7 rayed, dorsal annuli with round micro tubercles...................................................................... Tetra dalbergiae Kuang & Zhuo
Female genital coverflap with 10 longitudinal ridges, empodium 4 rayed, dorsal annuli with spiny microtubercles.............................................. Tetra suspensae n. sp.
10 Dorsal annuli with microtubercles.............................................................................. 11
Darsal annuli smooth................................................................................................... 15
11 Empodium 2 rayed ...................................................................... Tetra concava (Keifer)
Empodium 6 or 7 rayed............................................................................................... 12
12 Dorsal annuli with elliptical microtubercles................................ Tetra japonicae n. sp.
Dorsal annuli with spiny microtubercles..................................................................... 13
13 Shield design with median line complete.................................... Tetra formosae n. sp.
Shield design with median line incomplete................................................................. 14
14 Shield design with granules on lines, median line connected with admedian lines at basal 1 / 3.......................................................................................... Tetra lobatae n. sp.
Shield design without granules on lines, median and admedian lines separate..................................................................................................... Tetra superbae Huang & Wang
15 Median line on prodorsal shield present..................................................................... 16
Median line on prodorsal shield absent...................................................................... 19