Genus: When extended, trumpet-shaped or cylindrical; highly contractile; some with mucilaginous lorica; conspicuous peristomal field frontal; contractile vacuole anterior-left; fresh water (Kudo, 1966).
Species: Body pyriform when contracted; amethyst-blue; with Chlorella; 300-600 μm long; macronucleus oval (Kudo, 1966).
Cell body broadly trumpet shaped, 250-500 μm long when fully extended; cortical granules lilac or amethystine coloured or purplish red, surround also micronuclei; with symbiotic green algae (Foissner and Wölfl, 1994).
->> Description at WPRNO Google Image Search
S. amethystinus
oval mac.
430 x 100 μm
Numa-no-hara m.
Madarao highland
Niigata, 2005
S. amethystinus
or S. multiformis ?
oval mac.
120 μm
Japan, 1998
S. amethystinus
or S. multiformis ?
oval mac.
μm
Japan, 1998
