Key to World species of Discleroderma

1. Notaulus present..................................................................................... 2 - Notaulus absent...................................................................................... 3 2. Metasomal tubercles callus-shaped (Fig. 1D)...................................... D. tuberculatum Magretti, 1897 - Metasomal tubercles spine-shaped (Fig. 2D)................................... D. indiensis Lanes & Azevedo, 2008

3. Gena extremely bulging ventrally, ~1.5 × wider than eye in lateral view (Fig. 1E)............ D. gundari Terayama, 2006

- Gena regularly bulging ventrally, 1.1–1.4 × wider than eye in lateral view (Fig. 3E)................................ 4

4. Metasomal tubercles spine (Fig. 2H) or spoiler-shaped (Fig. 3H)............................................... 5

- Metasomal tubercles small, callus-shaped (Fig. 3D).......................................................... 6

5. Metasomal tubercles spine-shaped (Fig. 2H); anterior corner of metapectal-propodeal disc without cavity (Fig. 2G)............................................................................ D. yemenensis Lanes & Azevedo, 2008

- Metasomal tubercles spoiler-shaped (Fig. 3H); anterior corner of metapectal-propodeal disc with cavity (Fig. 3G)........................................................................................ D. plymouthoides sp. nov.

6. Head considerably converging anterad, wider posteriorly in dorsal view; gena visible in dorsal view (Fig. 3B).............................................................................................. D. concursum sp. nov.

- Head barrel-shaped, slightly wider medially than anteriorly and posteriorly in dorsal view, or nearly so; gena not visible in dorsal view (Figs 4C, F)............................................................................... 7

7. Head barrel-shaped, wider at mid-eye level (Fig. 4B); parapsidal signum complete, narrow, inconspicuous (Fig. 4C)............................................................................................ D. dolium sp. nov.

- Head subbarrel-shaped, wider at dorsal third of eye level (Fig. 4F); parapsidal signum incomplete anteriorly, thick, conspicuous (Fig. 4G).......................................................................... D. guamensis sp. nov.