| Specimen ID | 50177 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | MT |
| County | Gallatin |
| Locality | Madison River at Bakers Hole Campground in Gallatin National Forest below Yellowstone Park boundary. |
| Mapping Accuracy | Accurate |
| HUC8 Name | Madison |
| HUC8 Number | 10020007 |
| HUC10 Name | Headwaters Madison River |
| HUC10 Number | 1002000702 |
| HUC12 Name | Madison Arm-Madison River |
| HUC12 Number | 100200070205 |
| Map | |
| Collection Day | 5 |
| Collection Month | 8 |
| Collection Year | 1995 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker |
| Status | established |
| Reference 1 |
| Ref. Number: | 19769 |
| Author: | Montana State University. |
| Date: | 2011 |
| Title: | New Zealand mudsnails in the Western USA dataset (1995-2010). |
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| Comments | density = abundant |
| Record Type | Literature |
| Disposal | preserved |
| Museum Cat Number | W0044 MSU Bio. Dept., Bozeman |
| Verifier | Dan L. Gustafson, Bio. Dept. Montana St. U., Bozeman |
| Freshwater/Marine | Freshwater |
| Number Collected | 1000s |
