| Citation | Dunz, A.R. and U.K. Schliewen, 2009, Description of two new species of Nannocharax Günther, 1867 (Teleostei: Characiformes: Distichodontidae) from the Cross River, Cameroon.. Zootaxa 2028:1-19. |
| Ref. | 80507 Dunz, A.R. and U.K. Schliewen, 2009 |
| Page | 10;fig. |
| Named Used as Valid | Nannocharax usongo |
| Comment | Original description of Nannocharax usongo. Figure 5a-c, Table 4. |
| Locality | 'Cameroon, Cross River at Mamfé'. |
| Distribution | Cross River in Cameroon and Niger delta in Nigeria. |
| Quote |