Chlorophyceae: Chlorococcales: Micractiniaceae
Fresenius var. pusillum
Family: Unicellular or Colonial; cell body spherical, with one or more spiny projections;
a single cup-shaped chloroplast with a pyrenoid; asexual reproduction by zoospore or autospore;
sexual reproduction by fertilization between egg and sperm.
Genus: Colonial; cell body with 2 or more spiny hairs
(Illustrations of The Japanese Fresh-water Algae, 1977).
tape No. 0128, time code 0000,
a colony of 7-8 cells, cell body 5-8 μm diam.
with several needles ~30 μm long,
x 400, x 640, Japan, 199? by Y. Tsukii
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