image_list image_listE

Gamophyceae: Zygnematales: Desmidiaceae

Sphaerozosma excavatum
Ralfs
-->> Teilingia excavata (Ralfs) Bourrelly

Sphaerozosma excavatum Genus: Cell body flat, constricted at the center; semicells with two small projections at their apexes; cells connected with each other by the projections.
Species: Filaments not twisted; cells loosely connected to be separated; cell body 8.4-11 μm long, 7-10.8 μm wide, constriction 4-6 μm wide; semicells broad hexagonal in shape, apex slightly depressed, with two short projections to connect with adjacent cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Similar genus -->> Onychonema;


Sphaerozosma excavatum Ralfs ?, cell body 9 μm long, 9 μm wide, L/W=, isthmus 5 μm, x 640, Ushidome-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Sphaerozosma excavatum Sphaerozosma excavatum
Cell body 10 μm long, 9 μm wide, L/W=, isthmus 5 μm, x 640
Sphaerozosma excavatum

Images of collecting locality: Ushidome-ike (pond), Norikura highland, Azumi, Matsumoto city (formerly Azumi village), Nagano Pref., Japan, June 8, 2006 by Y. Tsukii


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