Genus: Variable in shape and in size; mostly longer than wide; strong constriction at center; semicell pyramid-shaped, apically flattened with indentation (or notch, some species lack this notch); laterally straight or wavy or indented; one chloroplast in each semicell; one pyrenoid for each chloroplast (Illustrations of The Japanese Fresh-water Algae, 1977).
Subgenus: Atomum (Apical area slightly depressed)
Section: Simplicia (Cell body small; cell surface smooth)
Species:
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E. sublobatum 27 x 19 μm 25 x 20 μm L/W=1.4, 1.3 Tanohara Natural p. Ontake highland Nagano, 2005 |
E. sublobatum ? μm L/W= Ko-numa 1 Minakami Gunma, 2008  |
E. sublobatum v. Kriegeri L/W= Kashibaru m. Karatsu Saga, 2008 |
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