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Diatoms of North America
Practitioners
Morphology
Centric
Araphid
Eunotioid
Symmetric Biraphid
Monoraphid
Asymmetric Biraphid
Epithemioid
Nitzschioid
Surirelloid
Genera
Species
Glossary
About Us
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Projects
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Taxon Contributors
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What are diatoms?
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GSN23403_1a.jpg
Species
Psammothidium helveticum
Slide Number
ANSP GC104328b
Site ID
USGS NECB0800ADE0007B
Name
MILL RIVER AT SUMMER STREET NEAR BLACKSTONE, MA
Caption
rapheless valve
Coordinates
42.0408, -71.5156
Scalebar = 10 µm
