1. Pedipalpal femur 5.1–5.4 times longer than broad …A. deciclavatus stat. nov. (Matsubarano-ana cave, Yamaguchi Prefecture, Japan)

- Pedipalpal femur 5.8–7.5 times longer than broad …2

2. Five pairs of setae on the anterior margin of carapace (A0–A5) …A. kyushuensis stat. nov. (Goya daiichi-do cave, Fukuoka Prefecture, Japan)

- Four pairs of setae on the anterior margin of carapace (A0–A4) …3

3. 18 setae on the carapace …A. uyamadensis stat. nov. (Uyama-do cave, Okayama Prefecture, Japan)

- More than 19 setae on the carapace …4

4. 24 setae on the carapace; carapace more than 0.6 mm …A. uenoi stat. nov. (Komakado-kaza-ana cave, Shizuoka Prefecture, Japan)

- 20 setae on the carapace; carapace less than 0.6 mm …5

5. 13–16 marginal teeth on both chelal finger; fingers not curved …A. ishikawai (Ryuga-do cave, Kochi Prefecture, Japan)

- 9–11 marginal teeth on both chelal finger; fingers strongly curved …A. shiragatakiensis stat. nov. (Shiragataki-do cave, Ehime Prefecture, Japan)