Protist Movies

Prasinophyceae: Polyblepharidales: Pedinomonadaceae

Monomastix opisthostigma
Scherffel 1912

Genus: Cell body slightly assymmetrical, prolate ellipsoidal or nearly cylindrical in shape; both ends rounded; horizontal (slightly slanted) depression present at anterior end; a single flagella emerging from the depression nearly vertically to longitudinal axis of the cell body; "pro-basal body" present (?); cell body covered by a layer of submicroscopic scales; chloroplast essentially cup-shaped, but deeply incised forming two lateral lobes; each lobe with a pyrenoid; stigma posterior or absent; nucleus at anterior half of the cell body; one or two contractile vacuoles apical; 1-7 trichocysts (up to 5 μm long) present at posterior, arranging longitudinally (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

Monomastix sp. (M. opisthostigma Scherffel 1912 ?), tape No. 0129, time code 0000, cell body narrowed posterior half, swim quickly with a flagellum anterior, 26 μm long, 9 μm wide, x 400, x 640, Akigase Park, Saitama city, Saitama Pref., Japan, October 22, 1998 by Y. Tsukii

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