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Diatoms of the United States is now known as Diatoms of North America.
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Planothidium lanceolatum

(Bréb. ex Kütz.) Lange-Bert. 1999      Category: Monoraphid
BASIONYM: Achnanthidium lanceolatum
SYNONYM(S): Achnanthes lanceolata (Bréb. ex Kütz.) Grunow in Van Heurck  

Planothidium holstii


Planothidium rostratum

SEM scalebar = 5 µm

Site ID: ANSP NRSA0479

Site Name: Stop River, MA

Latitude: 42.09069

Longitude: 71.29755

Caption: Internal view of raphe valve

Contributor: - December 2010