Visit us at

Diatoms of the United States is now known as Diatoms of North America.
This site has been redesigned and updated, and will be closing soon.


Pinnularia nodosa

(Ehrenb.) W.Sm. 1856      Category: Symmetrical biraphid
BASIONYM: Navicula nodosa

Pinnularia microstauron


Pinnularia nodosa var. percapitata

LM scalebar = 10 ┬Ám

Slide Number: MDC 38-65

Site ID: MDC 408101

Site Name: Johns Fen, Glacier National Park, MT

Latitude: 48.6364

Longitude: -113.8561

Caption: var. pseudogracillima

Contributor: Loren Bahls - March 2014