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Gamophyceae: Zygnematales: Desmidiaceae

Arthrodesmus incus
(Brébisson) Hassall var. incus
= Staurodesmus incus (Brébisson) Teiling 1967

Arthrodesmus incus 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: Semicells inverted semicircle or hexagon in shape; (Illustrations of The Japanese Fresh-water Algae, 1977).


Arthrodesmus incus (Brébisson) Hassall var. incus, cell body 16 μm long (excluding spines), 16 μm wide, L/W=, isthmus 9 μm wide, spiny projections 12 μm long, x 640, a small marsh near prefectural road route 342, Sukawa highland, Kurikoma mountain, Higashi-naruse village, Akita Pref., Japan, June 24, 2007 by Y. Tsukii
Arthrodesmus 31 μm Arthrodesmus 63 μm Arthrodesmus 94 μm; x 640
Arthrodesmus incus Arthrodesmus incus

Images of collecting locality: a small marsh near prefectural road route 342, Sukawa highland, Kurikoma mountain, Higashi-naruse village, Akita Pref., Japan, June 24, 2007 by Y. Tsukii


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