in vivo;ventral protuberances (yellow circle)

Description:

in vivo image of undescribed species of Chlamydonellopsis (BLATTERER & FOISSNER,1990).The yellow circle marks three nonmotile ventral protoplasmic protuberances. At first glance these can be mistaken for adherent bacteria.Usually visible only with DIC. This species differs from the other freshwater species ( C. pleurivacuolata and C. polonica) both of which have more numerous somatic kineties. C. pleurivacuolata has >2 contractile vacuoles and more numerous ventral protuberances. The ventral protuberances of C. polonica have probably been overlooked. Collected from a slow-moving freshwater stream near Boise,Idaho.March 2007.DIC.