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Gamophyceae: Zygnematales: Desmidiaceae

Cosmarium cucurbitinum
(Bisset) Lütkemüller var. cucurbitinum

Cosmarium cucurbitinum Species [ var. cucurbitinum ]: Cell body medium in size, (56.5-73)-83 μm long, 26-(28-30)-33 μm wide, L/W=2.5, slightly constricted at the center; semicells semi-spindle shaped, gradually attenuated toward apex, lateral margins convex, apex broad circular; cell wall dotted.
[ f. minor ]: Smaller than var. cucurbitinum, 50-(56-60) μm long, 22.5-25-(26.5-28) μm wide (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> C. cucurbita;


Cosmarium cucurbitinum (Bisset) Lütkemüllerv. cucurbitinum, cell body 69 μm long, 29 μm wide, L/W=2.4, isthmus 27 μm wide, x 640, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium cucurbitinum Cosmarium cucurbitinum
Cell body 69 μm long, 29 μm wide, L/W=2.4, isthmus 28 μm wide, x 640
Cosmarium cucurbitinum Cosmarium cucurbitinum

Cosmarium cucurbitinum (Bisset) Lütkemüllerv. cucurbitinum, cell body 66 μm long, 27 μm wide, L/W=2.4, isthmus 26 μm wide, x 640, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium cucurbitinum Cosmarium cucurbitinum

Images of collecting locality: No.5/6, Omine-numa (pond/marsh), Omine, Minakami town (formerly Tsukiyono town), Gunma Pref., Japan, May 25, 2006 by Y. Tsukii


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