| Specimen ID | 1634244 |
| Group | Mollusks-Bivalves |
| Genus | Corbicula |
| Species | fluminea |
| Common Name | basket clam |
| State | OR |
| County | Douglas |
| Locality | South Umpqua River near Myrtle Creek, OR |
| Mapping Accuracy | Accurate |
| HUC8 Name | South Umpqua |
| HUC8 Number | 17100302 |
| HUC10 Name | Clark Branch-South Umpqua River |
| HUC10 Number | 1710030211 |
| HUC12 Name | Willis Creek-South Umpqua River |
| HUC12 Number | 171003021102 |
| Map | |
| Collection Day | 13 |
| Collection Month | 9 |
| Collection Year | 2018 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed current | hitch hiker gut passage |
| Status | established |
| Comments | Site located approximately 300 meters downstream from the HWY 99 bridge over the South Umpqua River near Myrtle Creek, OR.
I was systematically excavating 0.25 m squared quadrats to look for buried juvenile mussels. There were so many C. fluminea in my excavation units that I counted live animals in 6 excavation units that were equally spaced through the bed. I counted 1,098 live C. fluminea in the 6 excavation units I chose to count them in (I excavated substrate to 13 cm depth). This area represents just 1.25 percent of the total bed area (bed area sampled was 150 m squared), so there are 1000s more C. fluminea at this location that are not represented in my Number Observed reported above. |
| Record Type | NAS sighting report |
| Verifier | Wesley Daniel (USGS) |
| Freshwater/Marine | Freshwater |
| Number Collected | 1098 |
| Photo | |
