Portrait of Collodictyon, a free-living heterotrophic flagellate of uncertain affinity. The cell has a ventral groove, flanked posteriorly by two rounded projections. There are four flagella about one and a half times the cell length. Collodictyon is a voracious feeder. The cell ingests other protists via the central groove. This cell has been grossly distorted by ingestion of the diatom, Actinella. A relationship to the biflagellate Diphyelleia has been suggested based on EM studies of the flagellar apparatus, dictyosomes and mitochondrial structure (Brugerolle, G. et al. Protist 153:59-70, 2002). From a temporary polysaprobic freshwater farm pond near Boise, Idaho. Differential interference contrast. This image was taken by William Bourland. He now uses a Zeiss Axioskop 2 with Spot Insight and Spot Flex CCD cameras (Diagnostic Instruments). Image copyright: William Bourland, image used under license to MBL (micro*scope).
download as pdf file
download large file
From the collection
Freshwater and Terrestrial Microbes of Idaho (USA) and Elsewhere
|Description of Collodictyon: Circumscription: Heterotrophic flagellates, four similar flagella inserting at the head of a broad ventral groove, ingesting algae via the groove. Ultrastructural identity: Mitochondria with tubular cristae, dictyosomes present, cells without walls, scales, or other excrescences. Synapomorphy: None at this time. The one ultrastructural study to date lacks detail, possibly related to Diphylleia. Composition: Several species. Ref: Klaveness 1995. |