image_list image_listE

Nassophorea: Nassulida: Parahymenostomatina: Paranassulidae

Paranassula sp.
Kahl, 1931

Paranassula Genus: Buccal cavity and internal atrium large; a well-developed cytopharyngeal basket present; the atrial depression is in two parts, the outer shallow region and an inner deep region leading to the cytostome (Carey, 1992). Like Nassula, but cyrtos has smaller opening (How to know the protozoa, 1979).

Paranassula microstoma, cell body 125 μm long, 45 μm wide, cyrtos more than 35 μm long, opening 5 μm wide, collected from fresh water, x 400, Japan, 1997 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Paranassula Paranassula Paranassula

P. microstoma (Claparède & Lachmann) : Pellicle roughened by a criss-cross of longitudinal and circular furrows; macronucleus elongate oval, posterior; contractile vacuole middle & right-dorsal; about 80-95 μm long, salt water (Kudo, 1966).

P. brunnea (Fabre-Domergue, 1885) Fauré-Fremiet, 1963 : 250-300 μm long; flexible and elastic but non-contractile; a single contractile vacuole middle; macronucleus long and vermiform (Carey, 1992).

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