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.

Epithemia reicheltii

Gomphoneis

GENERA
147 Completed
24 Underway
171 TOTAL
SPECIES
670 Completed
130 Underway
800 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

05 March, 2015

EPA Office of Water Support

01 December, 2014

Okeechobee or Okoboji? An Everglades Student’s Corny Tale

More news...


Projects

Diatoms from the Crown of the Continent

Ecology and Systematics of Diatoms course, 2014

Diatoms of North-Central Pennsylvania

More projects...