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

Sellaphora bacilloides

Brachysira

GENERA
155 Completed
19 Underway
174 TOTAL
SPECIES
793 Completed
170 Underway
963 TOTAL

Getting Started

About this website

What are diatoms?

Identify your taxa


Special News

25 March, 2011

Information for contributors


News

17 November, 2016

Diatom of the Month

26 September, 2016

Phycological Research Consortium gets things done

More news...


Projects

Ecology and Systematics of Diatoms course, 2012

Algal biodiversity in Great Smoky Mountains National Park

Artist Feature - Renee Robbins

More projects...