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.

Karayevia suchlandtii

Geissleria

GENERA
145 Completed
25 Underway
170 TOTAL
SPECIES
661 Completed
111 Underway
772 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

01 December, 2014

Okeechobee or Okoboji? An Everglades Student’s Corny Tale

29 August, 2014

Planning for the future of Diatoms of the United States

More news...


Projects

Ecology and Systematics of Diatoms course, 2011

Renovation and computerization of ANSP Diatom Herbarium

Diatoms from the Crown of the Continent

More projects...