| 1. | Elytral stria 2 not continued to the apex, ending just behind last discal seta (Fig. 7) | Eucamaragnathus fissipennis (Ancey, 1882) |
| – | Elytral striae 1 – 4 continued to apex (Fig. 3) | 2 |
| 2. | Pronotum with basal impression rugosely punctate. From continental Africa | 3 |
| – | Pronotum with basal impression smooth, no traces of punctation. From Madagascar | Eucamaragnathus suberbiei (Alluaud, 1914) |
| 3. | Pronotum with anterior angles markedly produced, sides barely sinuate behind (Fig. 3h in Erwin & Stork 1985) | Eucamaragnathus oxygonus (Chaudoir, 1861) |
| – | Pronotum sides sinuate, more or less cordiform | 4 |
| 4. | Male with tubercle on sternum VI | Eucamaragnathus bocandei (Alluaud, 1914) |
| – | Male without any specific character on sternum VI (except 1 pair of setae) | 5 |
| 5. | Pronotum with anterior transverse impression markedly punctate, punctation similar to that of the posterior transverse impression of pronotum | Eucamaragnathus castelnaui (Bocandé, 1849) |
| – | Pronotum with anterior transverse impression with only few punctures, punctuation less strong than on the posterior transverse impression of pronotum | Eucamaragnathus desenderi sp. n. |