| Citation | Betancur-R., R. and P.W. Willink, 2007, A new freshwater ariid (Otophysi: Siluriformes) from the Río Usumacinta Basin.. Copeia 2007(4):818-828. |
| Ref. | 75770 Betancur-R., R. and P.W. Willink, 2007 |
| Page | 820;fig.3 |
| Named Used as Valid | Potamarius usumacintae |
| Comment | |
| Locality | Guatemala, Petén, Río San Pedro at junction with springfed lagoon at El Paso de Caballo, Río Usumacinta basin, UMMZ 248165 (ex 143461). |
| Distribution | Endemic to the Río Usumacinta basin in Guatemala and Mexico (most specimens from Río San Pedro, Río de la Pasión, and Río Lacantún or their tributaries. |
| Quote |