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Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

Frontonia leucas
(Ehrenberg, 1833) 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 sp., collected from nature (left); fed on Chlorogonium, cell body 500-550 μm long, 140-168 μm wide, x 100, Japan, 199? by Y. Tsukii
scale 200 μm scale 400 μm scale 600 μm; x 100
Frontonia leucas Frontonia leucas Frontonia leucas Frontonia leucas Frontonia leucas

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