(Tetrastrum) (Tetrastrum) is a biological genus in the family Scenedesmaceae and order Sphaeropleales.
Tetrastrum elegans
Tetrastrum glabrum
Tetrastrum heteracanthum
Tetrastrum smithii
Tetrastrum staurogeniaeforme
Tetrastrum wisconsinense
Actinastrum
Coelastrum
Coronastrum
Crucigenia
Dictymocystis
Enallax
Scenedesmus
Tetradesmus
Tetrallantos
Tetrastrum