| Citation | Gold, J.R. and Y. Li, 1994, Chromosomal NOR karyotypes and genome size variation among squawfishes of the genus Ptychocheilus (Teleostei: Cyprinidae).. Copeia 1994(1):60-65. |
| Ref. | 34620 Gold, J.R. and Y. Li, 1994 |
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| Named Used as Valid | Ptychocheilus umpquae |
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