Cosmarium subspeciosum subsp. simplex
Cosmarium subspeciosum var. schaarschmidtianum
Cosmarium subspeciosum var. simplicius
Cosmarium subspeciosum f. brasiliense
Cosmarium subspeciosum f. antarcticum
Cosmarium subspeciosum var. effigiatum
Cosmarium subspeciosum var. truncatum
Cosmarium subspeciosum var. transiens
Cosmarium subspeciosum var. validius
Cosmarium subspeciosum var. simplex
Cosmarium subspeciosum var. subspeciosum
Cosmarium subspeciosum f. fontense
Cosmarium subspeciosum f. subornatum