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

(Lange-Bert.) Lange-Bert. 1999      Category: Monoraphid
BASIONYM: Achnanthes daonensis
SYNONYM(S): Psammothidium grischunum f. daonensis (Lange-Bert.) Bukht. and Round 

Psammothidium curtissimum


Psammothidium didymum

LM scalebar = 10 ┬Ám

Slide Number: ANSP GC109392a

Site ID: Montana DEQ U1104-A

Site Name: Wise River, MT

Latitude: 45.542

Longitude: -113.0829

Caption: rapheless valve

Contributor: Marina Potapova - August 2010