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Diatoms of the United States is now known as Diatoms of North America.
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Psammothidium acidoclinatum

(Lange-Bert.) Lange-Bert. 1996      Category: Monoraphid
BASIONYM: Achnanthes acidoclinata

Prestauroneis protracta


Psammothidium alpinum

SEM scalebar = 2 ┬Ám

Site ID: ANSP GCM4333

Site Name: Morris Run

Latitude: 41.55020

Longitude: -77.50487

Caption: external view of raphe valve

Contributor: - August 2010