-
Portrait of the planktonic trebouxiophyte alga, Tetrastrum staurogeniaeforme (Schröder) Lemmermann.The colonies consist of four ellipsoid cells with four to six short spinous projections from the each cell surface. several four-celled colonies may join together to form compound colonie (compound coenobia). Each cell has one plastid and one pyrenoid.Collected from a freshwater pond near Boise,Idaho. July 2005.DIC.
-
Green algae live in a mucus ball. Phase contrast microscopy.
-
Portrait of the nonmotile green alga, Franceia droescheri (Lemmermann, 1898). The cell is ovoid with a thin inflexible cell wall. Usually solitary but may be found in small colonies embedded in a gelatinous matrix.Long fine slightly tapered spinous projections are randomly distributed over the entire cell surface. The otherwise identical Chodatella ciliata has spines lacalized to the poles of the cell. F. droescheri has one to three parietal chloroplasts eache with a pyrenoid.The nucleus is not well seen in this image. Collected from freshwater pond near Boise, Idaho December 2003. DIC optics.
-
Chodatella citriformis containing 8 autospores, sampled from shore water of Lake Kinneret in March 2006. This Chlorophyte (Chlorococcales) can be found in the plankton of the lake at most times of the year, particularly in May-June, but is never dominant.
-
Portrait of the planktonic trebouxiophyte alga,Chodatella wratislaviensis (Schröder) Ley,1948.The ellipsoid cells are solitary.There are four slightly curved tapering spines each with a button-like base. two are polar and two equatorial.There is a single parietal chloroplast and a pyrenoid.Collected from a freshwater pond near Boise,Idaho(43°37'03.94"N 116°11'07.62"W elev. 2754 ft.) November 2005.DIC