Oligohymenophorea
(formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae
Frontonia elliptica
Beardsley, 1902
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).
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Similar Genus --> Disematostoma
Frontonia elliptica,
cell body μm long, μm wide,
x 640, Iruma River side, Tsurugashima city, Saitama Pref., Japan, August 2003 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
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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