portrait

Kuvaus:

Caenomorpha (seen-owe-morph-a) medusula. Body medusoid with 1 to 3 posterior spines. Without somatic cilia except for a band which lies near the membranelles. The membranelles form a long spiral that encircles the body and ends in posteriorly situated cytostome. A contractile vacuole is located at the base of the spine. Symbiotic (methanogenic) bacteria occur in the cytoplasm. Move very quickly, with a jerky rotation. Between 1-4 macronuclei but always with only 1 micronucleus. Common in anoxic habitats. This specimen was collected in a bog near Konstanz, Germany. The two macronuclei are visible near the center of the body and the contractile vacuole is located at the base of the spine. 90 microns long. Differential interference contrast.