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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 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 78 μm long, 42 μm wide, x 640, a small wetland near Numa-no-hara marsh (Genseikaen), Madarao highland (Niigata & Nagano Pref.), Myoko village, Niigata Pref., Japan, May 15, 2005 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Frontonia acuminata Frontonia acuminata Frontonia acuminata Frontonia acuminata
Cell body 73 μm long, 39 μm wide, x 640
Frontonia acuminata 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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