image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Cosmarium thwaitesii
Ralfs

Cosmarium thwaitesii Species: Cell body 58-75 μm long, 26.5-31 μm wide, L/W=2-2.5, isthmus 20-29 μm wide; semicells broad ellipsoidal or ovoidal, apex broad circular or narrowly flattened; cell wall finely dotted; band-form chloroplasts aligned along inner cellwall (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar species -->> C. oblongum; C. cucurbita; C. cucurbitinum; C. diplosporum; C. globosum;

Cosmarium thwaitesii (or C. oblongum ?), cell body 46 μm long, 24 μm wide, L/W=1.9, isthmus 21 μm wide, x 640, Yukawa-numa (pond), Nishiwaga-machi (town), Iwate Pref., Japan, July 28, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Cosmarium thwaitesii Cosmarium thwaitesii Cosmarium thwaitesii

Images of collecting locality: Yukawa-numa (pond), Nishiwaga-machi (town), Iwate Pref., Japan, July 28, 2007 by Y. Tsukii

Please click on images for viewing enlarged.
Copyright Protist Information Server