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Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

 Frontonia elliptica
Beardsley, 1902

Frontonia 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 150-200 μm long; macronucleus ovoid, with a single micronucleus large, ovoid in shape; two contractile vacuoles present (Kahl, 1930).
Similar Genus --> Disematostoma

Frontonia elliptica, cell body 114 μm long, 60 μm wide, trichocysts present (5.5 μm long, less than 1 μm wide), two (or three) contractile vacuoles, macronucleus ovoidal, with a single micronucleus relatively large, ellipsoidal, x 640, Izumi-no-mori-koen (Fountain forest park), Yamato city, Kanagawa Pref., Japan, March 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Frontonia elliptica Frontonia elliptica Frontonia elliptica Frontonia elliptica Frontonia elliptica Frontonia elliptica Frontonia elliptica

Frontonia elliptica Beardsley, 1902: Cell body 150-200 μm long; macronucleus ovoid, with a single micronucleus large, ovoid in shape; two contractile vacuoles present (Kahl, 1930).

Frontonia fusca (Quennerstedt 1869): Cell body 150-200 μm long; macronucleus ovoid, with a small micronucleu; a single contractile vacuole located at posterior half of the cell body (Kahl, 1930).

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