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Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

Frontonia depressa
(Stokes, 1886)
Frontonia parvula Penard, 1922

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: Cell body 60-80 μm long; macronucleus short sausage-shaped; a single micronucleus; a single contractile vacuole (Kahl, 1930).


Frontonia depressa, stock 27-1B, cell body μm long, μm wide, x 640, Hiroshima, Japan, 1999? by Y. Tsukii
scale 100 μm scale 200 μm scale 400 μm; x 100 ; scale 50 μm scale 100 μm scale 200 μm; x 200
Frontonia depressa Frontonia depressa Frontonia depressa

Frontonia depressa, stock 27-1B, stained with Azure C, cell body μm long, μm wide, x 640, Hiroshima, Japan, 1999? by Y. Tsukii
scale 16 μm scale 32 μm scale 63 μm; x 640
Frontonia depressa


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