Chromulinales

Ollicola pascheri (Van Goor, 1925) V+rs, 1992. The lorica is bell-shaped, posteriorly, in front very widened. The length is about 10 to 12 microns and the width below the anterior end is 10 to 12 microns Cells in the lorica are roundish, about 5 to 6 microns long with a flagellum. Cells have no chloroplasts.

Siphomonas, flagellate of uncertain affinities. Rate. Cells occur singly in this branching mucous colony. Cells observed but did not hang around long enough to be photographed. From Lake Donghu, China. Phase contrast micrograph.

Siphomonas, a colonial flagellate. The cells are housed at the end of a tube of mucus, but many tubes join together to form a branching colony with a shape that is a bit like a tree. Each cell has two flagella.

Portrait of the colorless chrysophyte, Siphomonas fritschii (Pringsheim,1946). Cells occur singly or in pairs at the ends of hollow, sometimes forked tubes with their flagella protruding. These tubes are sometimes tinged various shades of brown due to manganese and iron salts. The cells are rounded posteriorly and slightly truncate anteriorly. Two unequal flagella arise from the edge of the anterior end. A small greenish stigma lies near the flagellar insertions. The contractile vacuole is seen posteriorly in the uppermost cell. The cells frequently flee their stalks to swim free. Collected from an ephemeral freshwater pool near Boise, Idaho November 2004. Previously reported only from England and France. A dense growth of bacteria is evident in this image. DIC.

Portrait of the colorless chrysophyte, Siphomonas fritschii (Pringsheim,1946). Cells occur singly or in pairs at the ends of hollow, sometimes forked tubes with their flagella protruding. These tubes are sometimes tinged various shades of brown due to manganese and iron salts. The cells are rounded posteriorly and slightly truncate anteriorly. Two unequal flagella arise from the edge of the anterior end. A small greenish stigma lies near the flagellar insertions (seen best here in the cell at the viewer’s lower left). The contractile vacuole is seen in the two uppermost cells here. The cells frequently flee their stalks to swim free. Collected from an ephemeral freshwater pool near Boise, Idaho November 2004. Previously reported only from England and France. A dense growth of bacteria is evident in this image. Phase contrast.

Portrait of a group of Siphomonas fritschii (Pringsheim,1946), colorless chrysophytes, Cells occur singly or in pairs at the ends of hollow, sometimes forked tubes with their flagella protruding. These tubes occur in tangles and are sometimes tinged various shades of brown due to manganese and iron salts. The cells are rounded posteriorly and slightly truncate anteriorly. Two unequal flagella arise from the edge of the anterior end. A small greenish stigma lies near the flagellar insertions. A contractile vacuole is present. The cells frequently flee their stalks to swim free. Some empty tubes are seen here. Collected from an ephemeral freshwater pool near Boise, Idaho November 2004. Previously reported only from England and France.DIC.

Anthophysa (ann-though-fie-sa) is a colonial heterotrophic stramenopile (chrysophyte). Normally ball-shaped aggregates of cells are borne at the ends of brown stalks of an irregularly branching tree-like colony. In this case, the cells have broken away from the stalk. Phase contrast.

Anthophysa (ann-though-fie-sa) is a colonial heterotrophic stramenopile (chrysophyte). Ball-shaped aggregates of cells are borne at the ends of brown stalks of an irregularly branching tree-like colony. Phase contrast.

Anthophysa (ann-though-fie-sa) is a colonial heterotrophic stramenopile (chrysophyte). Normally ball-shaped aggregates of cells are borne at the ends of brown stalks of an irregularly branching tree-like colony. In this case, the cells have broken away from the stalk. Phase contrast.

Anthophysa (ann-though-fie-sa) is a colonial heterotrophic stramenopile (chrysophyte). Ball-shaped aggregates of cells are borne at the ends of brown stalks of an irregularly branching tree-like colony. Phase contrast.

Anthophysa vegetans (Muller) Stein, 1878. Cells are wide at the anterior and at one side of the anterior end is a site where food is taken in, and the two flagella (one longer one shorter) insert to the side of this. The posterior tip of the cell extendS into a fine protoplasmic filament of variable length and many cells are usually united at their bases into spherical or hemispherical colonies, and these may either be free-swimming or attached to the substrate by means of a stalk which is coloured brown and is often branched. The stalk nearest the cells is usually narrower and transparent, becoming thickened distally by the deposition of iron and manganese compounds, bacteria are embedded in it throughout its length and can be seen clearly close to the colony.

Anthophysa vegetans.

Brightfield portrait of the colourless chrysophyte, Anthophysa, from a freshwater pond near Boise, Idaho.

Anthophysa vegetans is a colonial stramenopile, which lives in all shaped colonies at the end of irregular sometimes branching mucoid stalks that become brown with age. Common in sites with high organic loading. Common in Lake Donghu. Phase contrast optics.

Anthophysa vegetans is a colonial stramenopile, which lives in all shaped colonies at the end of irregular sometimes branching mucoid stalks that become brown with age. Common in sites with high organic loading. Common in Lake Donghu. Phase contrast optics.

Anthophysa vegetans is a colonial stramenopile, which lives in all shaped colonies at the end of irregular sometimes branching mucoid stalks that become brown with age. Common in sites with high organic loading. Common in Lake Donghu. This is a massive aggregate of colonies. Dark ground optics.

Anthophysa vegetans is a colonial stramenopile, which lives in all shaped colonies at the end of irregular sometimes branching mucoid stalks that become brown with age. Common in sites with high organic loading. Common in Lake Donghu. Phase contrast optics.

Colony, shown as if attached to the air-water interface. Long brown stalks support small balls of colorless cells.

Portrait of the colonial chrysophyte, Anthophysa vegetans (Müller, 1773) Stein, 1878. Collected from an ephemeral freshwater puddle on the lawn of a public park near Boise, Idaho.September 2006. DIC.

Portrait of the colonial chrysophyte, Anthophysa vegetans (Müller, 1773) Stein, 1878. Collected from an ephemeral freshwater puddle on the lawn of a public park near Boise, Idaho.September 2006. DIC.

Portrait of the colonial chrysophyte, Anthophysa vegetans (Müller, 1773) Stein, 1878. Collected from an ephemeral freshwater puddle on the lawn of a public park near Boise, Idaho.September 2006. DIC.

Portrait of the colonial chrysophyte, Uroglena volvox (Ehrenberg, 1835). colonies free-swimming, spherical, ellipsoidal or oblong, up to several 100 (rarely >1000)μm in diameter; cells radially arranged in a single layer at the periphery of a gelatinous matrix;the friable colonies are easily disrupted by the pressure of the coverslip. The interior of the matrix is fairly homogeneous or containing a system of fine, radiating and branched stalks to which the cells are attached by their pointed posterior ends; individual cells Ochromonas-like, with 2 flagella of unequal length; chloroplasts 1-2, laminate to discoid, at least in one species containing a pyrenoid; eyespot usally 1 (rarely 2 or lacking); contractile vacuoles 1-3; numerous muciferous bodies located at the cell periphery; nutrition phototrophic and phagotrophic; cell division longitudinal; colony reproduction by constriction into two daughter colonies or by fragmentation; stomatocysts frequently observed, their ornamentation used for species identification; some species of common occurrence in the plankton of lakes and ponds, sometimes bloom-forming, one marine species. Collected from a freshwater dredge pond near Idaho City, Idaho June 2005. Brightfield.