| Citation | Smith, J.A., 1863. Notice of the ukpam, a large species (probably new) of sting ray (Trygon, Cuv.), found in the Old Calabar River, Africa. Proc. R. Phys. Soc. Edinb. 2:64-69. |
| DOI | http://dx.doi.org/ |
| Paper URL | |
| Address | |
| Ref. No. | 97748 |
| Language | English |
| Usage | used in part |
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