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Life / Eukarya / Cryptista

Kathablepharidea (Kathablepharis, Leucocryptos, Hatena etc.)
Goniomonadea (Goniomonas)
Cryptophyceae (Cryptomonas, Guillardia, Rhodomonas, Chroomonas etc.)

1. Kathablepharida
2. Cryptophyta

The cryptists are unicellular flagellate organisms. They are basically phagotrophic but the Cryptophyceae is photosynthetic with chloroplasts via secondary endosymbiosis with a red alga. The cryptists are common in freshwater and marine.

Cells possess two heterodynamic flagella inserted parallel. Nucleus is not closely associated with basal bodies. Mitochondrial cristae are flat or tubular (Kathablepharidea). There are unique ejectile organelles, ejectosomes which are composed of rolled ribbon surrounded by membrane. Asexual reproduction by means of binary fission. Sexual reproduction by isogamy is reported in the Cryptophyceae. The unique alternation of generations is found in the Cryptophyceae.


1: Leucocryptos (Kathablepharidea, NIES-1335). 2: Goniomonas (NIES-1378). 3: Cryptomonas (Cryptophyceae, NIES-278).
Eukarya