Mallomonas papillosa K.Harris & D.E.Bradley emend. K.Harris

(Fig. 3E, F)

DISTRIBUTION. — Cosmopolitan (Kristiansen 2000).

REMARKS

Besides typical scales with a shield densely covered with papillae (Fig. 3E), we observed scales with nearly smooth shields (Fig. 3F). Similar nearly smooth scales were observed by Balonov (1978) from rivers in the Yaroslavl Region in Russia, Péterfi et al. (1998) from the bog-lake Baláta-tó in Hungary, and Gusev et al. (2019b) from rivers in Nizhniy Novgorod in Russia. Since we recorded the different scales from the different samples they may represent two separate taxa.