1. Epigynum of females have narrow first windings of the copulatory duct system (Figs 5, 10); Pedipalpus of males lacking RTA (Figs 7, 13)... The insolens species­group... 2

­ Epigynum of females have broad first windings of the copulatory duct system (Figs 17, 22, 28, 33); Pedipalpus of males have RTA (Figs 19, 24, 30, 35).................................................................................................................... The pennatus species­group... 5

2. Females......................................................................................................................... 3

­ Males............................................................................................................................ 4

3. Epigynum with one pair of leaf­like anterior margins, spermathecae triangular (Figs 4–5).................................................................................................... Plator insolens Simon

­ Epigynum with a pair of eye­like anterior margins and spermathecae oval (Figs 9–10) ............................................................................................ Plator sinicus Zhu et Wang

4. Median apophysis almost warship­shaped and pointed distally, subtegulum without hump (Figs 6–7)......................................................................... Plator insolens Simon

­ Median apophysis really oval and rounded distally, subtegulum with a hump medianlly (Figs 12–13)................................................................. Plator sinicus Zhu et Wang.

5. Females......................................................................................................................... 6

­ Males............................................................................................................................ 9

6. Anterior epigynal margin weakly sclerotized and M­shaped, anteriorly copulatory ducts long, spermathecae with a small head laterally (Figs 16–17)...................................................................................................................................... Plator bowo sp. nov.

­ Anterior or lateral epigynal margins strongly clerotized (Figs 21, 27, 32).................. 7

7. Anterior epigynal margins narrow, semicircular, located medially, copulatory openings posteriolateral (Figs 21–22)..................................................... Plator pandeae Tikader

­ Epigynal margins lateral or anteriolateral, copulatory openings at anterior median (Figs 27, 32)................................................................................................................. 8

8. Epigynum with short margins at anteriolateral corners, anteriorly copulatory ducts Ushaped (Figs 27–28)................................................................. Plator pennatus Platnick

­ Epigynum with margins laterally, large and C­shaped, anteriorly copulatory ducts short, parallel to each other (Figs 32–33) .................................. Plator yunlong sp. nov.

9. Pedipalpal median apophysis without hook or prong (Figs 18, 23)............................. 10

­ Pedipalpal median apophysis with hook or prong (Figs 29, 34)................................ 11

10. Median apophysis long and horn­shaped in ventral view, widened distally in lateral view (Figs 18–19).......................................................................... Plator bowo sp. nov.

­ Median apophysis short and spine­shaped in ventral view, pointed distally in lateral view (Figs 23–24).................................................................... Plator pandeae Tikader

11. Median apophysis triangular at lateral view, hooked distally, tegulum not extended posteriorly (Figs 29–30) .......................................................... Plator pennatus Platnick

­ Median apophysis oval at lateral view, tegulum extended posteriorly (Figs 34–35)...... ................................................................................................... Plator yunlong sp. nov.