20 ALGAE IN PHYTOPLANKTON OF THE UNITED STATES 



Division Chlorophyta 

 Class Chlorophyceae 

 Order Chlorococcales 

 Family Oocystaceae 

 GENUS CHODATELLA Lemmermann, 1898 (fig. 4) 



Generic synonym. -Lagerheimia Chodat, 1895. 



MORPHOLOGY 



Solitary cells are citriform, ellipsoidal, subcylindrical, or subspherical 

 and contain long setae that are subpolar, or subpolar and equatorial, in 

 insertion. One to four laminate to discoid chromatophores are present. 



REPRODUCTION 



Cells divide into 2, 4, or 8 autospores, which are released 

 simultaneously from the parent-cell wall. Setae develop after release. 



OCCURRENCE 



Solitary, free-floating cells are found commonly in the euplankton. 



ENVIRONMENTAL CONDITIONS 



Standard 

 Range Mean deviation 



Temperature degrees Celsius 0.0 - 



pH 5.6 - 



Dissolved oxygen milligrams per liter .1 - 



Specific conductance micromho 1 1 



Total alkalinity milligrams per liter 3 



Total hardness do 5 



Total nitrogen do .05- 



Total phosphorus do .0 - 



SPECIES INFORMATION 



Refer to Smith (1920, 1926) and Prescott (1962). 



