Arcella vulgaris
                This is a vent view of a sample of Arcella vulgaris from a
                  well. 
              
              
                Transmitted Oblique Illumination
                
Definition/Function:
                Arcella vulgaris is a rhizopoda of the Order Testacida and Family Arcellidae. It is a
                very common Thecamoebian.
                Significance in the Environment:
                Characteristic Features:
                Arcella vulgaris is a circular dome with a concave small central vent underneath. The
                test has a pattern of hexagons that are each about
                one micrometer across.
                Associated Particles:
                References:
                Jahn, T. L., HOW TO KNOW THE PROTOZOA, Wm. C. Brown Co. Publ., p. 126, 1949.
                
                Scott, DAVID B., FRANCO S. Medioli, and Charles T. Schafer, MONITORING IN COASTAL
                ENVIRONMENTS USING FORAMINIFERA AND THECAMOEBIAN INDICATORS,
                Cambridge University Press, 2001.