Key to species of Angustopelta n. gen.

1. Anterolateral margin of adults with prominent lateral tooth (Fig. 11 A–C). Posterolateral margins prominently diverging (Fig. 11 A–C) [Japan; Philippines; Indonesia]............................................................. A. aurita

- Anterolateral margin of adults with low tubercle or unarmed (e.g., Fig. 13). Posterolateral margins gradually diverging or appearing subparallel (e.g., Fig. 13)...................................................................... 2

2. Anterolateral margin unarmed (Fig. 11 D–F). Distal half of G1 relatively short (Fig. 73 F–H) [Japan, Taiwan]... A. cribrorum

- Anterolateral margin unarmed or with small tubercle (e.g., Fig. 12 A–G). Distal half of G1 relatively long (e.g., Fig. 74 A–D)..................................................................................................... 3

3. Press-button for pleonal holding present as 2 small, short tubercles posterior to thoracic sternal suture 4/5, one near edge of sterno-pleonal cavity, one just outside (Fig. 59 J). Distal part of G1 relatively short, stout, gently curved (Fig. 74 A–D) [Vanuatu]................................................................................... A. robusta n. sp.

- Press-button for pleonal holding as small, short tubercle posterior to thoracic sternal suture 4/5 near edge of sterno-pleonal cavity (e.g., Fig. 59 I). Distal part of G1 relatively long, slender, distinctly curved (Fig. 74 F–H) [Solomon Islands; Fiji].............................................................................................. A. modesta n. sp.