| Specimen ID | 157350 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | MT |
| County | Big Horn |
| Locality | Bighorn River just below the Yellowtail Afterbay Dam |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lower Bighorn |
| HUC8 Number | 10080015 |
| HUC10 Name | Grapevine Creek-Bighorn River |
| HUC10 Number | 1008001503 |
| HUC12 Name | War Man Creek-Bighorn River |
| HUC12 Number | 100800150302 |
| Map | |
| Collection Day | 14 |
| Collection Month | 9 |
| Collection Year | 2002 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker |
| Status | established |
| Reference 1 |
| Ref. Number: | 13644 |
| Author: | Richards, D., B. Kerans, and D. Gustafson. |
| Date: | 2003 |
| Title: | New Zealand mudsnail in the Western USA, Chronology of important New Zealand mudsnail discoveries. |
| Publisher: | Montana State University, Dept of Ecology. |
| Issue: | http://wwwesgmontanaedu/aim/mollusca/nzms/ |
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| Reference 2 |
| 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 | Found in moderate numbers. Found at a very popular tailwater trout fishery. Substantial jump from other known populations. Snails do not appear to extend far downstream. |
| Record Type | Literature |
| Museum Cat Number | G1163 |
| Freshwater/Marine | Freshwater |
