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Gamophyceae: Zygnematales: Desmidiaceae

Arthrodesmus controversus
W. et G.S. West
= Staurodesmus controversus

Arthrodesmus controversus Genus: Cell body small, length = width, strong constriction at its center; semicells inverted triangular, ellipsoidal, rectangular, etc. in shape; straight or slightly curved spiny projections at each corner; one pyrenoid in each semicell; cell wall smooth (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:


Arthrodesmus controversus W. et G.S. West (large var. ?), cell body 18 μm long, 15 μm wide (excluding short spines), L/W=1.2, isthmus 9 μm wide, x 640, Tenbo marsh (or bog), Tsugaike highland (Tsugaike Natural Park), Otari village, Nagano Pref., Japan, July 3, 2005 by Y. Tsukii
Arthrodesmus 31 μm Arthrodesmus 63 μm Arthrodesmus 94 μm; x 640
Arthrodesmus controversus Arthrodesmus controversus Arthrodesmus controversus Arthrodesmus controversus Arthrodesmus controversus Arthrodesmus controversus Arthrodesmus controversus Arthrodesmus controversus


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