Key to Glyphochaitophorus Qiao gen. nov. and allied Acer -feeding genera (based on apterous viviparous females)

1. Siphunculi generally stump-shaped, with an apical zone of polygonal reticulation; antennal setae usually long and conspicuous, mostly much longer than diameter of segment from which they arise............................ Periphyllus van Heven

- Siphunculi various shapes, without polygonal reticulation; antennal setae various lengths, often shorter than or not much longer than the width of the segment from which they arise......................................................... 2

2 Apterae with spino-pleural setae on abdominal tergites as long and thick as marginal setae, and at least some of them with flattened or expanded apices........................................................ Yamatochaitophorus Higuchi

- Apterae with spino-pleural setae on abdominal tergites often minute, sometimes long, but always with finely pointed apices 3

3 Body dorsum covered with well-developed “O”-like, “C”-like or irregularly shaped wart-like sculpturing; siphunculi with spinulose transverse striae; cauda knobbed; frontal setae, and setae on abdominal tergites VII-VIII thick and long with blunt apices, dorsal setae on other tergites hardly discernible; apical tibial setae distinctly differentiated..................................................................................................... Glyphochaitophorus Qiao

- Body dorsum rugose or corrugated over entire surface or marginally more conspicuous, but without “O-”, “C”-like sculptures; siphunculi with striations but without spinules; cauda rounded; setae on front of head, and marginal setae on abdominal tergites modified as flattened lamellae; apical tibial setae not differentiated.......................... Trichaitophorus Takahashi