Desmidium

Photo by David J. Patterson

Eunotia

Photo by David J. Patterson

Dactylaria

Photo by David J. Patterson

Dunaliella

Photo by David J. Patterson

Emerald Pool

Photo by David J. Patterson

Leptosiropsis torulosa

Photo by David J. Patterson

Mallomonas

Photo by David J. Patterson

Micrasterias

Photo by David J. Patterson

Pleurosigma

Photo by David J. Patterson

Histioneis

Photo by John Dolan

Salpingella faurei

Photo by John Dolan

Calimitra

Photo by John Dolan

Ceratium Soup

Photo by Christian Sardet

Ceratium ranipes

Photo by Christian Sardet

Ceratium arcticum

Photo by John Dolan

Guinardia delicatula

Photo by John Dolan

Trypanosoma brucei

Photo by Kildare Miranda

The International Society of Protistologists is an association of scientists devoted to research on single-celled eukaryotes, or protists. The ISOP promotes the presentation and discussion of new or important facts and problems in protistology, and works to provide resources for the promotion and advancement of this science.

A green circle with two smaller white outline circles inside green circle. The words Protistology Open 2026 Prhah in white between the two white circles. A protist is in the center of the green cirllce

IX European Congress of Protistology (ECOP)
August 2 – August 6, 2027
University of Kent in Canterbury (UK)
https://www.protistology.org.uk/ecop-2027

The Society of Protozoologists began its publication of The Journal of Eukaryotic Microbiology in 1954 with the first issue dedicated to the memory of L. L. Woodruff. It has been published uninterrupted since then, promoting the study of protozoa in particular, and protists in general.