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). Species: |
31 μm
63 μm
94 μm; x 640
Micractinium pusillum Fresenius var. pusillum,
cell body 11 μm in diam., spiny projections up to 60 μm long,
x 640, Kenmin-kenko-fukushi-mura Park, Koshigaya city, Saitama Pref., Japan, February 5, 2006 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
Kenmin-kenko-fukushi-mura Park, Koshigaya city, Saitama Pref., Japan, February 5, 2006 by Y. Tsukii
Micractinium pussillum Fresenius var. elegans G. M. Smith: a colony of 4-32 spherical cells, cell body 3-5 μm diam., with 2-3 needle-like projections 20-30 μm long, a single cup-shaped chloroplast with a pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).