Diatom identification guide & ecological resource

for water resource managers, ecologists, taxonomists, analysts, systematists, students, and the public.

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  We aim to provide everyone with accurate information about diatoms of the United States.


Expert contributors are submitting text and images for freshwater genera and North American species, including taxonomic and ecological information.


Diatom "bird guides" are included for all taxa (examples to the right). For many species, environmental response plots and geographic distribution maps are included.


Our editorial review board is ensuring the scientific merit of each submission and directing site development.

Staurosirella leptostauron var. dubia

Tetracyclus

GENERA
147 Completed
24 Underway
171 TOTAL
SPECIES
673 Completed
137 Underway
810 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

10 May, 2015

A small fraction of the semi-known species

05 March, 2015

EPA Office of Water Support

More news...


Projects

Ecology and Systematics of Diatoms course, 2011

Algal biodiversity in Great Smoky Mountains National Park

Craticula: a gothic horror?

More projects...