| Citation | Hugg, D.O., 1996, MAPFISH georeferenced mapping database. Freshwater and estuarine fishes of North America.. Life Science Software. Dennis O. and Steven Hugg, 1278 Turkey Point Road, Edgewater, Maryland, USA. |
| Ref. | Hugg, D.O., 1996 |
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| Named Used as Valid | Cottus extensus |
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