| Division | Chlorophyta |
| Class | Chlorophyceae |
| Order | Sphaeropleales |
| Family | Scenedesmaceae |
| Basionym | Scenedesmus bijugus var. arcuatus Lemmermann |
Colony consists of 4, 8, 16 cells and in arranged in two rows but only the inner cells lying above each other. Colonies with cavities or intercellular spaces between the cells and covered by a mucilaginous sheath. Cells smooth, ovoid or slightly cylindrical and slightly curved with broad rounded apex. Cells measure 10-15 μm long and 7-10 μm broad. The marginal cells show convex outer sides.
Ecology
Thalli collected as plankton form from Nattalam pond, Vilavancode Taluk.