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Chlorophyta: Prasinophyceae: Chlorodendrales (Tetraselmidales)
Mastigophora: Phytomastigophorea: Prasinomonadida

 Tetraselmis cordiformis
(Carter) Stein, 1878
Syn: Carteria cordiformis (Carter) Dill, 1895

Tetraselmis cordiformis Genus: Cell body ellipsoidal-ovoidal with cell wall; Four euqal-length flagella arising from an anterior depression of the cell body; chloroplast cup-shaped with a pyrenoid at the bottom; a single stigma large; two contractile vacuoles at the base of flagella (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).
Species: Cell body ovoidal, 16-23 μm in diam.; anterior depression 1/5-1/6 of the body length; a single circular stigma located at the equatorial line (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000).

Tetraselmis cordiformis (Carter) Stein ?, cell body (left) 17 μm long, 15 μm wide, L/W=1.1, elongated elliptical stigma located above equator of the cell body, four flagella present, x 640, O-ike, Shiroyama Park, Okegawa city, Saitama Pref., Japan, January 29, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis Tetraselmis cordiformis

Images of collecting locality: O-ike, Shiroyama Park, Okegawa city, Saitama Pref., Japan, January 29, 2006 by Y. Tsukii

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