Key to species of Heptagoniodes (adult males only)

(updated from Guimarães 1948)

1 Head with anterior margin of temples sharply pointed (Fig. 4); mesosomal plate with lateral projections (Figs 10, 12)...... 2

- Head with anterior margin of temples rounded (Fig. 3); mesosomal plate without lateral projections (Fig. 11)............. 4

2 Genitalia with mesosome as in Fig. 12 ................................................ H. guimaraesi Valim n. sp.

- Genitalia with mesosome as in Fig. 10..................................................................... 3

3 Total length <2.50 mm; mesosomal plate short (0.18 mm)............................. H. dimorphus Carriker, 1944

- Total length> 2.60 mm; mesosomal plate long (0.30 mm)....................... H. agonus (Nitzsch [in Giebel], 1866)

4 Post-ocular emargination very shallow, less pronounced; temples truncated. Mesosome as a sclerotized, tubular structure (see Plate XXX, figs 3, 3a, in Carriker, 1936)............................................. H. mirabilis Carriker, 1936

- Post-ocular emargination deep, well pronounced (Fig. 3); temples nearly rounded (Fig. 3). Mesosome as a non-sclerotized, rugose, tubular structure (Fig. 11)............................................ H. clayae Guimarães & Lane, 1937