image_list image_listE

Oligohymenophorea (formerly Nassophorea): Peniculida: Frontoniina: Frontoniidae

Frontonia sp.
Ehrenberg, 1838

Frontonia leucas 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: 150-600 μm long; ventrally flattened; dark colored; buccal cavity close to anterior end (How to know the protozoa, 1979). Elongate 150-600 μm long; anterior is not wider than posterior; cytostome small with well defined pre- and postoral suture; a large macronucleus with three micronuclei; single contractile vacuole with 12 radiating canals; many trichocysts (Carey, 1992). Cell body 150-600 μm long (Kahl, 1930).


Frontonia leucas isolated macronuclei, cell body μm long, μm wide, x 400, x 640, Japan, 199? by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200
Frontonia leucas Frontonia leucas


Please click on images for viewing enlarged.
Copyright Protist Information Server