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 prioritizing taxa for treatment in species pages and ensuring the scientific merit of each submission.

Encyonema prostratum

Pinnularia

GENERA
149 Completed
22 Underway
171 TOTAL
SPECIES
689 Completed
144 Underway
833 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

18 August, 2015

Colleges - get ready, your students already know about diatoms

29 July, 2015

A centric revolution? Or natural nomenclature?

More news...


Projects

Ecology and Systematics of Diatoms course, 2012

Renovation and computerization of ANSP Diatom Herbarium

Diatoms of North-Central Pennsylvania

More projects...