image_list image_listE

Euglenophyceae: Sphenomonadales: Petalomonadaceae
Euglenida: Sphenomonadida

Petalomonas sp.

Petalomonas Genus: Only 1 emergent flagellum; locomotory flagellum directed anteriorly, straight, during swimming; colourless, phagotrophic; no eyespot; rigid, solitary, ovoid, usually flat, with several keels; freshwater (Illustrated Guide, 1985). Oval or pyriform; not plastic; pellicle often with straight or spiral furrow; a single flagellum; many species (Kudo, 1966).
Similar genus -->> Notosolenus;

Petalomonas sp. (center), cell body 21 μm long, 10 μm wide, anterior flagellum 30 μm long
Ophrydium sp. (left), cell body 140 μm long, 25 μm wide, stalk 15 μm long, x 640, Shimo-no-koike (small pond), Shiga highland, Yamanouchi town, Nagano Pref., Japan, September 26, 2004 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Petalomonas Petalomonas Petalomonas Petalomonas

* P. bicarinata: 30-35 μm; 2 dorsal, 2 ventral grooves on either side of dorsal and ventral keels (How to know the protozoa, 1979).
P. mediocanellata: 21-26 μm; with median, longitudinal grooves, dorsal and ventral (How to know the protozoa, 1979).
P. alata: 23-25 μm; with one dorsal, one ventral, and two lateral grooves (How to know the protozoa, 1979).
P. asymmetrica: 18-25 μm; pyriform, with a deep lateral groove (How to know the protozoa, 1979).

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