| Main Ref. | National Register of Lake Surveys, 2006 (Ref. 57534) |
|---|---|
| Name used | Gymnocephalus cernuus |
| Locality | Lake NORRA YXESJÖN |
| Station | FRI-661703-130037-19840708 |
| Year | 1984 |
| Water depth | 41 m |
| Altitude | 213 m |
| Coordinates | In decimal: 59.63, 12.27 |
| Collector | Freshwater Research Institute |
| Identifier | Freshwater Research Institute |