30 ALGAE IN PHYTOPLANKTON OF THE UNITED STATES 



Division Chlorophyta 

 Class Chlorophyceae 

 Order Chlorococcales 

 Family Micractiniaceae 

 GENUS GOLENKINIA Chodat, 1894 (fig. 9) 



MORPHOLOGY 



Solitary cells, 7-15 pcm in diameter, contain numerous, long, slightly 

 tapering setae. The single chromatophore is parietal and cup shaped. 



REPRODUCTION 



Two, 4, or 8 autospores are formed and released by fragmentation of 

 the parent-cell wall. Sexual reproduction is oogamous. Biflagellate an- 

 therozoids swarm around a cell containing a single egg, a part of which 

 protrudes through the cell wall. After fusion, the zygote moves through 

 the pore and becomes attached to the parent-cell wall. 



OCCURRENCE 



Golenkinia is common in the euplankton. It is present generally in 

 shallow, slow-moving waters. 



ENVIRONMENTAL CONDITIONS 



Standard 

 Range Mean deviation 



Temperature degrees Celsius 0.0 



pH 5.5 



Dissolved oxygen milligrams per liter .1 



Specific conductance micromho 10 



Total alkalinity milligrams per liter 6 



Total hardness do 7 



Total nitrogen do .9 



Total phosphorus do .0 



SPECIES INFORMATION 



Refer to Tiffany (1934), Smith (1920), and Prescott (1962). 



