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Cryptophyceae: Cryptomonadales: Cryptomonadaceae
Cryptomonadida

Cryptomonas tetrapyrenoidosa
Skuja, 1948

Cryptomonas Genus: Elliptical body with a firm pellicle; dorsal side convex, ventral side slightly flat; "cytopharynx" with granules; two lateral chromatophores (chloroplasts) vary in color from green to blue-green, brown or rarely red; 1-3 contractile vacuoles anterior (Kudo, 1966). Cell body elongated ovoid or elliptical; cytopharynx conspicuous; three rows of ejectisome (trichocysts) (Yamagishi, 1999).
Species: Cell body 16-25 μm long, 8-13 μm wide, thickness 7-12 μm; anterior end slanted, posterior end rounded; longitudinal groove extending to near the posterior end; chloroplasts brownish, with 4, 6-7 pyrenoids; starch granules scattered within the chloroplasts; stigma absent; two refractile bodies at the center of the cell (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
Similar genus -->> Chroomonas; Chilomonas;


Cryptomonas tetrapyrenoidosa, cell body 27-31 μm long, 15-16 μm wide, 5 or more pyrenoids present, x 400, x 640, Isa-numa (pond), Kawagoe, Saitama Pref., Japan, May 2001 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Cryptomonas Cryptomonas Cryptomonas Cryptomonas Cryptomonas Cryptomonas


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