Golden Algae

Ollicola vangoorii (Conrad, 1938) Voers, 1992. Lorica: 2-3 x 3-5 microns (2-3 x 3-7 microns), protoplast diameter: 1-2 microns (2-3 microns).The cell is oval-globular and carries two unequal heterokont flagella. It resides in a lorica, which is divided into an anterior cylindrical and a basal conical part. The lorica wall may be conspicuously thickened, with a yellow or orange tint. The intensity of the colour varies, depending on the degree of Fe and Mn mineralization. A transverse striation of the lorica is sometimes visible by light-microscopy. When viewed by electron microscopy, the lorica appears to be fibrous, constructed of a spirally curved ribbon, similar to the lorica of some bicosoecids. The number of transverse striations varies from about 5 to about 10. Fine structural studies show that C. vangoorii is bacterivorous but also possesses an apparently typical chrysophyte chloroplast.

Portrait of the stylococcacean chrysophyte,Bitrichia longispina (Lund) Bourelly, 1957. Collected from a freshwater pond near Boise, Idaho 43°37'03.94"N 116°11'07.62"W elev. 2754 ft. November 2005.Phase contrast.

Portrait of the stylococcacean chrysophyte,Bitrichia longispina (Lund) Bourelly, 1957. Collected from a freshwater pond near Boise, Idaho 43°37'03.94"N 116°11'07.62"W elev. 2754 ft. November 2005.DIC.

Heterochromonas (het-err-ock-row-moan-ass) opaca Skuja, 1948. Cell outline is oval. Cells are about 16 - 18 microns long and somewhat dorso-ventrally flattened, and have an anterior protrusion and a central nucleus. The cells appear to be rigid. The cells have a deep ventral depression and are somewhat warty. Two flagella insert subapically into the depression, the anterior flagellum is about 0.5 times cell length, and the posterior flagellum is slightly longer than the cell and inserts below the anterior flagellum. The cells move by gliding with the anterior flagellum directed forwards and the posterior flagellum trailing.

Heterochromonas opaca Skuja, 1948. Cell outline is oval. Cells are about 16 - 18 microns long and somewhat dorso-ventrally flattened, and have an anterior protrusion and a central nucleus. The cells appear to be rigid. The cells have a deep ventral depression and are somewhat warty. Two flagella insert subapically into the depression, the anterior flagellum is about 0.5 times cell length, and the posterior flagellum is slightly longer than the cell and inserts below the anterior flagellum. The cells move by gliding with the anterior flagellum directed forwards and the posterior flagellum trailing.

Chrysophyte. This cell was not identified to genus. It contains a plastid with chlorophylls a and c, a contractile vacuole is evident at the top of the cell, and the cell is surrounded in an organic wall. although these cells were common in some locations, no motile forms corresponding to these cells were seen. Differential interference contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Chromulina (crumb-you-line-a) nebulosa, a small chrysophyte (stramenopile) with a single emergent flagellum, and with a golden plastid. Phase contrast microscopy. data on this strain.

Chromulina (crumb-you-line-a) nebulosa, a small chrysophyte (stramenopiles) with a single emergent flagellum. A second short flagellum is visible because cell division is beginning to occur (note the two chloroplasts) and a second flagellum has formed. -Phase contrast microscopy. data on this strain.

Dinobryon (dine-owe-bry-on) is a loricate chrysophyte (stramenopile) flagellate. This image shows a single lorica. Phase contrast.

Dinobryon (dine-owe-bry-on) is a loricate chrysophyte (stramenopile) flagellate. Cells have one long and one short flagellum, and there is an eye-spot at the front end of the plastid. Differential interference contrast.

Dinobryon (dine-owe-bry-on) is a loricate chrysophyte (stramenopile) flagellate. Cells have one long and one short flagellum, and there is an eye-spot at the front end of the plastid. Neck with a number of ridges. Phase contrast.

Dinobryon (dine-owe-bry-on) is a loricate chrysophyte (stramenopile) flagellate. Cells have one long and one short flagellum, and there is an eye-spot at the front end of the plastid. Cells can encyst within the lorica, and form a pored cyst called a stomatocyst, one is visible here. Phase contrast.

Dinobryon (dine-oh-bry-on) a mixotrophic stramenopile (chrysophyte) with one long flagellum and one short flagellum. When feeding heterotrophically, the beating of the long flagellum draws food towards the cell where it may be ingested. The cell also has brownish chloroplasts. It forms a flimsy tubular lorica. Phase contrast microscopy.

Dinobryon (dine-oh-bry-on) a mixotrophic stramenopile (chrysophyte) with one long flagellum and one short flagellum. When feeding heterotrophically, the beating of the long flagellum draws food towards the cell where it may be ingested. The cell also has brownish chloroplasts. It forms a flimsy tubular lorica. Phase contrast microscopy.

Dinobryon (dine-oh-bry-on) a mixotrophic stramenopile (chrysophyte) with one long flagellum and one short flagellum. When feeding heterotrophically, the beating of the long flagellum draws food towards the cell where it may be ingested. The cell also has brownish chloroplasts. It forms a flimsy tubular lorica which is emphasised in this image. Phase contrast microscopy.

Dinobryon (die-know-bry-on) sertularia, a loricate chrysophyte (stramenochrome) alga, the vase-shaped lorica is organic, most species are usually found with the loricae attached to each other to form arborescent colonies. With two flagella, one longer one drawing water towards the cell and a shorter one. With golden plastid. Phase contrast microscopy. data on this strain.

Dinobryon (die-know-bry-on) sertularia, a loricate chrysophyte (stramenochrome) alga, the vase-shaped lorica is organic, most species are usually found with the loricae attached to each other to form arborescent colonies. Differential interference microscopy. data on this strain.

Dinobryon (die-know-bry-on) sertularia, a loricate chrysophyte (stramenochrome) alga, the vase-shaped lorica is organic, most species are usually found with the loricae attached to each other to form arborescent colonies. Phase contrast microscopy. data on this strain.

Dinobryon sertularia.

Colonial chrysophyte flagellate, Dinobryon sertularia (EHRENBERG,1834) . Cells in vase shaped loricae. During division, daughter cells in this species attach to the inner surface of the mother cell lorica, giving rise to typical branching colonies. Loricae are composed of cellulosic microfibrils. Cells with two unequal flagella. Two large chloroplasts. Prominent stigma. Mixotrophic because the cells can phagocytose bacteria as well as carry out photosynthesis. From freshwater pond near Boise, Idaho. Oblique illumination.

Portrait of Epipyxis utriculus (Ehrenberg 1832) Ehrenberg, 1838. Collected from a freshwater pond near Boise, Idaho (43°37'04.05" N;116°11'06.99" W). October 2005.DIC.

Portrait of colonial form of chrysophyte flagellate, Epipyxis. Cells attach to the base of vase-like loricae by protoplasmic threads containing microtubules. Loricae are constructed of overlapping scales. The scales, visible only by electron-microscopy or staining are composed of interwoven microfibrils. Yellow chloroplast with small stigma (not well-seen in this image). Epipyxis is mixotrophic. Phagotrophy involves bacterial capture by the longer of the two flagella and formation of a feeding "basket" by microtubular action at the anterior of the cell. Often epiphytic on filamentous algae as seen here but sometimes free-swimming. From freshwater pond near Boise, Idaho. Phase contrast.

Epipyxis, a chrysophyte flagellate which may be colonial or solitary as seen in this image. These cells are epiphytic on filamentous algae. There is a yellow chloroplast and small stigma. The stigma is not well seen in this image. Two unequal flagella are present. Cells attach to the base of vase-like loricae by protoplasmic threads containing microtubules. Loricae are constructed of overlapping scales. The scales, visible only by electron-microscopy or staining are composed of interwoven microfibrils. From freshwater pond near Boise, Idaho. Phase contrast.