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 "visual guides" are included for all taxa.  The guides illustrate key traits that distinguish a taxon (examples to the right). For many species, environmental response plots and geographic distribution maps are also included.



Our editorial review board is prioritizing taxa for treatment in species pages and ensuring the scientific merit of each submission.

See any issues with content or functionality? If so,  please let us know

Stauroneis siberica

Hygropetra

GENERA
155 Completed
18 Underway
173 TOTAL
SPECIES
761 Completed
196 Underway
957 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

15 April, 2016

Track new content on DOTUS

01 April, 2016

International Diatom Symposium Workshops

More news...


Projects

Algal biodiversity in Great Smoky Mountains National Park

Craticula: a gothic horror?

Diatoms from the Crown of the Continent

More projects...