image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

 Arthrodesmus octocornis
(Ehrenberg ex Ralfs) West et G.S. West
= Xanthidium octocorne Ehrenberg ex Ralfs 1848 (The Freshwater Algal Flora of the British Isles 2002)
= Octacanthium Compère 1996

Arthrodesmus octocornis 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 octocornis Ehrenberg, cell body 21 μm long, 17 μm wide (excluding short spines), L/W=1.2, isthmus 5 μm wide, spines up to 8 μm long, x 640, Iroha-numa (marsh), Zao mountain, Yamagata city, Yamagata Pref., Japan, July 9, 2005 by Y. Tsukii
Arthrodesmus 31 μm Arthrodesmus 63 μm Arthrodesmus 94 μm; x 640
Arthrodesmus octocornis Arthrodesmus octocornis

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