New Zealand Mud Snail

Scientific name: Potamopyrgus antipodarum (J. E. Gray, 1853)

Synonyms: Hydrobia jenkinsi (Smith E. A., 1884), Potamopyrgus jenkinsi (Smith, 1889)

Common name: New Zealand mud snail, Jenkin's spire shell

Native To: New Zealand

Date of U.S. Introduction: The snail was first found in the United States in the 1987 in the Snake River near Hagerman, Idaho (Bowler 1991).

Images: Invasive.org and Google

Video: New Zealand Mudsnail PSA (or click Play button below)

Means of Introduction: Possibly through ballast water or game fish imports

Impact: Displaces and competes with native invertebrates

Current U.S. Distribution:

• Current New Zealand Mudsnail Sightings Distribution (updated daily)
• NAS Database map
• Maps (Southwest region)

Management Plans: Aquatic Species / New Zealand Mudsnail

Selected Internet Resources:

• Federal Government
• State Government
• University/Academic
• International
• Organizations

Federal Government

Potamopyrgus antipodarum
Integrated Taxonomic Information System.
Taxonomy

New Zealand Mudsnail
Aquatic Nuisance Species Task Force.
Identification/Description; Photographs; Impacts; Controls

Harmful Aquatic Hitchhikers: Mollusks: New Zealand Mud Snail
Protect Your Waters and Stop Aquatic Hitchhikers!
Photographs; Impacts; Distribution; Dispersion

New Zealand Mudsnail - Potamopyrgus antipodarum (PDF | 388 KB)
DOD. USACE. Engineer Research and Development Center. Environmental Laboratory.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Controls; Special Note: Bibliography

Potamopyrgus antipodarum Article Citation Search - AGRICOLA Database
USDA. National Agricultural Library.
Research

New Zealand Mud Snail, Baseline Distribution and Monitoring Study
DOI. NPS. Yellowstone National Park.
Photographs; Impacts

Nonindigenous Species Information Bulletin: New Zealand mudsnail (2002; PDF | 212 KB)
DOI. USGS. Florida Caribbean Science Center.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Habitat; Distribution; Controls

Potamopyrgus antipodarum - Nonindigenous Aquatic Species Database
DOI. USGS. Southeast Ecological Science Center.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Special Note: Distribution maps and collection information (State and County)

New Zealand Mudsnail (Potamopyrgus antipodarum)
EPA. Pacific Northwest Region.
Taxonomy; Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Distribution; Dispersion; Controls; Special Note: Contact Information

State Government

Most Unwanted: New Zealand Mudsnails (PDF | 252 KB)
Alaska Department of Fish and Game. Sport Fish Division.
Photographs; Habitat; Distribution; Dispersion; Controls

Non-Native Invasive Species: New Zealand Mudsnail
California Department of Fish and Game.
Photographs; Controls

Aquatic Hitchhikers: New Zealand Mudsnail
Colorado Division of Wildlife.
Identification/Description; Photographs; Introduction History; Controls

Mud Snail Closures on Boulder Creek
City of Boulder. Colorado.
Identification/Description; Photographs; Introduction History

Aquatic Invasive Species: New Zealand Mudsnail (PDF | 122 KB)
Indiana Department of Natural Resources.
Identification/Description; Photographs; Introduction History; Impacts; Life Cycle; Distribution; Dispersion; Controls

New Zealand mudsnail (Potamopyrgus antipodarum)
Kansas Department of Wildlife and Parks.
Identification/Description; Photographs; Introduction History; Distribution; Dispersion; Controls

New Zealand Mudsnail (Potamopyrgus antipodarum)
Minnesota Department of Natural Resources.
Photographs; Impacts; Distribution; Controls; Legal Aspects

New Zealand Mudsnail - Potamopyrgus antipodarum
Montana Natural Heritage Program and Montana Fish, Wildlife, and Parks. Montana Field Guide.
Taxonomy; Identification/Description; Photographs; Introduction History; Habitat

Potamopyrgus antipodarum
Washington Department of Fish and Wildlife.
Identification/Description; Photographs; Introduction History; Life Cycle; Distribution; Controls

New Zealand Mudsnails
University of California. Division of Agricultural and Natural Resources. Cooperative Extension.
Identification/Description; Photographs; Introduction History; Impacts; Distribution

New Zealand Mud Snail, Potamopyrgus antipodarum
University of California - Riverside. Center for Invasive Species Research.
Identification/Description; Photographs; Introduction History; Impacts; Distribution

New Zealand Mud Snail in the Southwestern United States
University of California - Santa Barbara. Marine Science Institute. Riparian Invasions Research Laboratory.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Controls; Research; Special Note: Bibliography; Report a Sighting

New Zealand Mudsnails in the Western USA
Montana State University.
Identification/Description; Photographs; Introduction History; Impacts; Distribution; Controls; Research; Special Note: Bibliography; Report a Sighting

Potamopyrgus spp. - National Aquatic Nuisance Species Clearinghouse
New York Sea Grant; Cornell University; DOC. National Oceanic and Atmospheric Administration; State University of New York.
Research; Special Note: Includes information products for sale and bibliographies

New Zealand Mudsnails: How to Prevent the Spread of New Zealand Mudsnails through Field Gear (2010; PDF | 912 KB)
Oregon Sea Grant.
Identification/Description; Photographs; Introduction History; Distribution; Dispersion; Controls; Special Note: Contacts

New Zealand Mudsnail - Potamopyrgus antipodarum
Portland State University. Center for Lakes and Reservoirs.
Photographs; Introduction History; Life Cycle; Distribution; Controls

International

Potamopyrgus antipodarum
Joint Nature Conservation Committee.
Taxonomy; Introduction History; Distribution

Potamopyrgus antipodarum (mollusc) - ISSG Global Invasive Species Database
World Conservation Union. Invasive Species Specialist Group.
Taxonomy; Identification/Description; Impacts; Life Cycle; Habitat; Distribution; Controls

Species: New Zealand Mudsnail (Potamopyrgus antipodarum)
Pacific States Marine Fisheries Commission. Aquatic Nuisance Species.
Identification/Description; Photographs; Impacts; Distribution; Dispersion; Legal Aspects; Special Note: Bibliography

New Zealand Mudsnails Threaten Native Wildlife - Mudsnails.com
Santa Monica Bay Restoration Commission.
Identification/Description; Photographs; Impacts; Habitat; Distribution; Controls