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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
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Glossary
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Contact Us
What are diatoms?
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Images of
Gomphonema
semiapertum
Grunow in Van Heurck 1880
Type Specimen
Slide Number
Montana Diatom Collection 125-5
Site ID
Montana Diatom Collection 457201
Site Name
North Umpqua River, Douglas County, Oregon
Coordinates
43.3108, -122.1536
Scalebar = 10 µm
Slide Number
Montana Diatom Collection 125-5
Site ID
Montana Diatom Collection 457201
Site Name
North Umpqua River, Douglas County, Oregon
Coordinates
43.3108, -122.1536
Scalebar = 10 µm
Slide Number
Montana Diatom Collection 125-5
Site ID
Montana Diatom Collection 457201
Site Name
North Umpqua River, Douglas County, Oregon
Coordinates
43.3108, -122.1536
Scalebar = 10 µm
Slide Number
Montana Diatom Collection 125-5
Site ID
Montana Diatom Collection 457201
Site Name
North Umpqua River, Douglas County, Oregon
Coordinates
43.3108, -122.1536
Scalebar = 10 µm
Slide Number
Montana Diatom Collection 125-45
Site ID
Montana Diatom Collection 464901
Site Name
Bessie Creek, Klamath County, Oregon
Coordinates
42.7417, -122.3708
Scalebar = 10 µm
Slide Number
Montana Diatom Collection T3-14-16
Site ID
Montana Diatom Collection 244802
Site Name
Clearwater River, Douglas County, Oregon
Coordinates
43.2425, -122.2339
Scalebar = 10 µm
Slide Number
Montana Diatom Collection 125-5
Site ID
Montana Diatom Collection 457201
Site Name
North Umpqua River, Douglas County, Oregon
Coordinates
43.3108, -122.1536
Scalebar = 10 µm