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Chlorophyceae: Chlamydomonadales (Volvocales): Phacotaceae
Volvocida: Chlamydomonadina: Phacotidae

 Phacotus lenticularis
(Ehrenberg) F. Stein var. lenticularis 1878

Phacotus Genus: With two equal-length flagella, cell body within a test consisting of two cup-shaped parts; test surface hairly or granular; a single chloroplast cup-shaped, with a prenoid (Photomicrographs of the Freshwater Algae, 1998).
Species: (An illustrated guide to freshwater zooplankton in Japan, 2000).

Phacotus lenticularis ? (Phacotaceae, Volvocales, Chlorophyceae), test about 17 μm in diam., μm in thickness, x 640, Kiyasse-Hanyu (Mitagaya Agriculture Park), Mitagaya, Hanyu city, Saitama Pref., Japan, March 4, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Phacotus lenticularis Phacotus lenticularis

Images of collecting locality: Kiyasse-Hanyu (Mitagaya Agriculture Park), Mitagaya, Hanyu city, Saitama Pref., Japan, March 4, 2006 by Y. Tsukii

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