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

Navicula viridulacalcis subsp. neomundana

Nitzschia

GENERA
155 Completed
19 Underway
174 TOTAL
SPECIES
777 Completed
186 Underway
963 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

12 August, 2016

When art and diatoms collide

15 April, 2016

Track new content on DOTUS

More news...


Projects

From a playful summer camp…

U.S. Geological Survey / Academy of Natural Sciences of Philadelphia

Diatoms from the Crown of the Continent

More projects...