Cosmarium pseudoprotuberans var. alpinum
Cosmarium pseudoprotuberans var. angustius
Cosmarium pseudoprotuberans var. australe
Cosmarium pseudoprotuberans f. excavatum
Cosmarium pseudoprotuberans var. groenbladii
Cosmarium pseudoprotuberans var. kossinskaiae
Cosmarium pseudoprotuberans var. angulatum
Cosmarium pseudoprotuberans var. retusiforme
Cosmarium pseudoprotuberans var. notatum
Cosmarium pseudoprotuberans var. inapertum
Cosmarium pseudoprotuberans var. trigonum
Cosmarium pseudoprotuberans var. saxonicum
Cosmarium pseudoprotuberans var. pygmaeum
Cosmarium pseudoprotuberans var. sulcatum
Cosmarium pseudoprotuberans var. tumidum