A Japanese Mystery Snail found in Prince George's Co., Maryland (5/30/2014). Verified by Robert T. Dillon/College of Charleston.
A Japanese Mystery Snail in Howard Co., Maryland (9/1/2015). Identification confirmed by by Dr. James Young (APHIS), Matt Ashton, Natural Resource Biologist IV (DNR), and Ellen Friedman, Biological Identification Section Head (DNR).
A Japanese Mystery Snail in Howard Co., Maryland (9/1/2015). Identification confirmed by by Dr. James Young (APHIS), Matt Ashton, Natural Resource Biologist IV (DNR), and Ellen Friedman, Biological Identification Section Head (DNR).
A juvenile Japanese Mystery Snail in Charles Co., Maryland (9/21/2016). Measured 12 mm.
A Japanese Mystery Snail in the Potomac River, Washington, D.C. (8/17/2017). Measured 15 mm.
Japanese Mystery Snails in Howard Co., Maryland (8/3/2016).
Map Snapshot
8 Records
Status
According to USGS (2017), non-indigenous occurrences of this species are as follows: " Mid-Atlantic Region: Concord River, Massachusetts. Great Lakes: Japanese mystery snails was found for the first time in Lake Erie in the 1940s (Mills et al. 1993, Wolfert and Hiltunen 1968). There are also some specimens of this species from Green Bay, Lake Michigan from some time before 1968 (Wolfert and Hiltunen 1968)."
Description
See USGS identification notes. Compare very similar Chinese Mystery Snail.
Seasonality Snapshot
MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/. Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
A Japanese Mystery Snail found in Prince George's Co., Maryland (5/30/2014). Verified by Robert T. Dillon/College of Charleston.
View Record Details
Media by
Robert Aguilar, SERC.
A Japanese Mystery Snail in Howard Co., Maryland (9/1/2015). Identification confirmed by by Dr. James Young (APHIS), Matt Ashton, Natural Resource Biologist IV (DNR), and Ellen Friedman, Biological Identification Section Head (DNR).
View Record Details
Media by
Sue Muller.
A Japanese Mystery Snail in Howard Co., Maryland (9/1/2015). Identification confirmed by by Dr. James Young (APHIS), Matt Ashton, Natural Resource Biologist IV (DNR), and Ellen Friedman, Biological Identification Section Head (DNR).
View Record Details
Media by
Sue Muller.
A juvenile Japanese Mystery Snail in Charles Co., Maryland (9/21/2016). Measured 12 mm.
View Record Details
Media by
Robert Aguilar, SERC.
A Japanese Mystery Snail in the Potomac River, Washington, D.C. (8/17/2017). Measured 15 mm.
View Record Details
Media by
Robert Aguilar, SERC.
Japanese Mystery Snails in Howard Co., Maryland (8/3/2016).
View Record Details
Media by
Bob Cammarata.