Toxicysts, extrusive organelles, (sometimes called extrusomes in protistan lingo) in the proter (or anterior daughter) of a dividing cell. Toxicysts can be very long and are aligned along microtubular...

Colpoda is a soil ciliate and this micrograph is characterized by numerous mucocysts and food vacuoles containing bacteria in various stages of digestion. This electron micrograph is near the posterio...

Euplotes sp. (eurystomus ?) is a hypotrich. This ciliate has a few rows of dorsal cilia as well as specialized clumps of cilia called cirri on its ventral side and a complex of membranelles involved i...

A low power view of a median transverse section of a green Trichodina that lives on the surface of a freshwater snail collected in central Illinois. In this view the abundant endosymbiotic zoochlorell...

A partially filled contractile vacuole is connected to two regions of spongiome tubules. The extra CV membrane is acquired from these spongiomes. Presumably some of these spongiome tubules are decorat...

11 micrographs are views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 4 food vacuoles; 3 segments of macronucleus; cytopha...

A mAb, B25-1-3, was raised to antigen Q2 (arbitrary code) to the same set of membranes as mAb 132-F4-G6 labels. This mAb was more reactive on frozen sections. To tell the age of vacuoles, cells were e...

Monoclonal antibody, E30-2-1, was raised to antigen D6 that specifically labels acidosomes and DV-II. There was no label on the nascent vacuole membrane or ciliary membranes. This cell had been incuba...

Euplotes sp. (eurystomus ?) is a hypotrich. This ciliate has a few rows of dorsal cilia as well as specialized clumps of cilia called cirri on its ventral side and a complex of membranelles involved i...

11 micrographs are views of a serially-sectioned contracted Vorticella convallaria cell that show the main features of this cell. This figure shows 4 food vacuoles; 3 segments of macronucleus; cytopha...