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Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

Frontonia sp.
Ehrenberg, 1838

Frontonia leucas Genus: Postoral kineties usually to left of oral poykinetids (Illustrated Guide, 1985). Left edge is more curved than right edge; cytopharynx with numerous strong fibrils; ectoplasm with numerous fusiform trichocysts; macronucleus oval; one to several micronulei (Kudo, 1966).
Species: 150-600 μm long; ventrally flattened; dark colored; buccal cavity close to anterior end (How to know the protozoa, 1979). Elongate 150-600 μm long; anterior is not wider than posterior; cytostome small with well defined pre- and postoral suture; a large macronucleus with three micronuclei; single contractile vacuole with 12 radiating canals; many trichocysts (Carey, 1992). Cell body 150-600 μm long (Kahl, 1930).

Frontonia, stock Tms-1, cell body μm long, μm wide, trichocysts 8 μm long, 1.5 μm wide, this stock grows well when Chlorogonium sp. used as food (it is different from F. vernalis), macronucleus ellipsoidal, with many large protenaceous granules (nucleoli ?) at its periphery, endosymbiotic algae is also different from that of F. vernalis, x 400, x 640, Tochigi Pref., Japan, 2002 by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200
Frontonia Frontonia Frontonia Frontonia Frontonia

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