Closterium setaceum var. setaceum
Closterium setaceum var. sigmoideum
Closterium setaceum var. vittatum
Closterium setaceum var. elongatum
Closterium setaceum var. minus
Closterium setaceum f. rectum
Closterium setaceum f. sigmoideum
Closterium setaceum var. intermedium
Closterium setaceum var. rectum
Closterium setaceum var. rollii
Closterium setaceum f. recta