| Citation | Poll, M., 1949, L'introduction en Belgique et l'acclimatation dans le nature d'un poisson American supplémentarie Umbra pygmaea (DeKay).. Bull. Inst. R. Sci. Nat. Belg. 25(35):1-11. |
| Ref. | 39073 Poll, M., 1949 |
| Page | 8-10 |
| Named Used as Valid | Umbra pygmaea |
| Comment | Cited in Ref. 4639. Not actually seen. |
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