Phylum: Charophyta   Family: Desmidiaceae

Hyalotheca dissiliens var. tatrica Raciborski

Differs from the nominate in being more barrel-shaped and with a more noticeable sinus. Rarely recorded

References: 
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands
Tsarenko, P.M., Wasser, S.P. & Nevo, E. editors (2014) Algae of Ukraine, Volume 4: Charophyta