Didymosphenia geminata
Didymosphenia geminata
(didymo)
Algae
Cryptogenic
Collection Info
Point Map
Species Profile
Animated Map
Impacts

18 results for Didymosphenia geminata (didymo)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1695485 NHSullivanConnecticut River2007 01080106 Black River-Connecticut Riverestablished
1760874 NYDelaware[No locality description provided]2007 02040102 East Branch Delaware 
1333399 NYDelawareDownstream of Shehawken boat launch.2007 02040101 Upper Delawareestablished
1760543 NYDelawareWest Branch Delaware River2007 02040101 Upper Delaware 
1762843 NYDelawareWest Branch Delaware River2007 02040101 Upper Delaware 
1762711 NYSullivanDelaware River2007 02040101 Upper Delaware 
1761967 NYUlster[No locality description provided]2007 02020006 Middle Hudson 
1761325 NYWashingtonBatten Kill River2007 02020003 Hudson-Hoosic 
1760284 PAPikeDelaware River2007 02040104 Middle Delaware-Mongaup-Brodhead 
1762959 PAPikeDelaware River2007 02040104 Middle Delaware-Mongaup-Brodhead 
1333428 PAWayneBehind old Methodist Camp.2007 02040101 Upper Delawareestablished
1763377 PAWayneDelaware River2007 02040101 Upper Delaware 
1761428 PAWayneDelaware River2007 02040101 Upper Delaware 
1760697 PAWayneDelaware River2007 02040101 Upper Delaware 
1333258 PAWayneDownstream of Buckingham boat launch.2007 02040101 Upper Delawareestablished
1759144 PAWayneWest Branch Delaware River2007 02040101 Upper Delaware 
1761459 PAWayneWest Branch Delaware River2007 02040101 Upper Delaware 
1761474 PAWayneWest Branch Delaware River2007 02040101 Upper Delaware 

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

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 [2/20/2026].

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