Diatom identification guide & ecological resource

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

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.

Psammothidium curtissimum

Orthoseira

GENERA
144 Completed
12 Underway
156 TOTAL
SPECIES
614 Completed
136 Underway
750 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

01 March, 2014

The Glossary Project: Illustrated terms, with style

28 January, 2014

Visualizing Diatom Evolution

More news...


Projects

Artist Feature - Renee Robbins

Ecology and Systematics of Diatoms course, 2014

Diatoms from the Crown of the Continent

More projects...