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Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

 Frontonia acuminata
Ehrenberg, 1833, (F. acuminata var. angustata Kahl, 1931; F. arenaria Kahl, 1933):

Frontonia acuminata 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: Ovoid, 60-100 μm long; cytostome ovoid; a single macronucleus and single micronucleus anterior; a single contractile vacuole central; numerous large trichocysts (Carey, 1992). Cell body 60-150 μm long (Kahl, 1930).
F. acuminata var. angusta: Cell body 80-100 μm long (Kahl, 1930).
Similar Genus --> Disematostoma

Frontonia acuminata, cell body 120 μm long, 70 μm wide, a single macronucleus anterior, a single contractile vacuole central or just behind equator, numerous large trichocysts, x 100, x 400, Japan, 1998 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Frontonia acuminata Frontonia acuminata

F. acuminata Ehrenberg, 1833 (F. acuminata var. angustata Kahl, 1931; F. arenaria Kahl, 1933): Ovoid, 60-100 μm long; cytostome ovoid; a single macronucleus and single micronucleus anterior; a single contractile vacuole central; numerous large trichocysts (Carey, 1992).

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