Diatoms in a Different Light
- Article by Roland Mortimer on these organisms, with a small image gallery of different freshwater species.
- http://www.microscopy-uk.org.uk/mag/artsep00/roldiatdf5.html

The Diatoms of Bitter Lake National Wildlife Refuge
- Photographic study by David B. Richman of the diatoms living in lakes in this high-gypsum environment.
- http://www.microscopy-uk.org.uk/mag/artoct06/dr-diatoms2.html

Diatom Display
- Small photograph gallery of these organisms.
- http://www.microscopy-uk.org.uk/micropolitan/marine/diatom/index.html

Diatoms
- Article by Wim van Egmond introducing these delicate unicellular organisms that have yellow-brown chloroplasts that enables them to photosynthesize, with fine photographs.
- http://www.microscopy-uk.org.uk/mag/wimsmall/diadr.html

Major Groups of Diatom
- Provides a facility for identifying diatoms based on their major morphological characteristics.
- http://www.umich.edu/~phytolab/GreatLakesDiatomHomePage/groups/majorgroups.html

Farlow Diatoms
- Information on this collection of about 30,000 microscope slides and field specimens which have been collected by diatomists and botanists.
- http://zutto.huh.harvard.edu/diatom/

Chesapeake and Coastal Bay Life - Diatoms
- Fact sheets on the diatom genera and species found in Maryland in Chesapeake Bay and its tributaries.
- http://www.dnr.state.md.us/bay/cblife/algae/diatom/index.html

Introduction to Bacillariophyta (the Diatoms)
- Information about the fossil record, life history and ecology, systematics, and morphology.
- http://www.ucmp.berkeley.edu/chromista/bacillariophyta.html

Great Lakes Diatoms
- Collection of images, classified by morphology and by genus.
- http://www.umich.edu/~phytolab/GreatLakesDiatomHomePage/top.html

Cohn Lab Center For Diatom Research
- Dedicated to expanding research and general knowledge of diatoms, includes basic introductions about diatoms, and information about the laboratory and the research undertaken.
- http://condor.depaul.edu/~diatom

California Academy of Sciences Diatom Collection
- An extensive resource on diatom taxonomy, primarily focused on recent freshwater diatoms of the United States.
- http://www.calacademy.org/research/diatoms/