Specimen Information

Potamopyrgus antipodarum
Potamopyrgus antipodarum
(New Zealand mudsnail)
Mollusks-Gastropods
Exotic
Collection Info
Point Map
Species Profile
Animated Map
Impacts

Specimen ID1633834
GroupMollusks-Gastropods
GenusPotamopyrgus
Speciesantipodarum
Common NameNew Zealand mudsnail
StateCA
CountyMarin
LocalityNovato Creek, downstream of the Novato Fair Shopping Center bridge
Mapping AccuracyAccurate
HUC8 NameSan Pablo Bay
HUC8 Number18050002
HUC10 NamePetaluma River-Frontal San Pablo Bay Estuaries
HUC10 Number1805000206
HUC12 NameNovato Creek
HUC12 Number180500020603
Map
Collection Day19
Collection Month7
Collection Year2012
Year AccuracyActual
Potential Pathwayhitch hiker
Statusunknown
CommentsOriginal sighting was during the sediment removal project in 2012 within Novato Creek. Samples were sent to different places, including CDFW, which confirmed they were New Zealand mud snails.
Record TypeNAS sighting report
VerifierWesley Daniel (USGS)
Freshwater/MarineFreshwater
Photo
Potamopyrgus antipodarum

Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [1/21/2026].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.