FIGURES 19, 20 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features

FIGURES 19, 20: LM images of Euastrum pseudotuddalense in frontal and apical view, respectively. FIGURE 21: LM picture of Sphaerozosma vertebratum, courtesy H. Schulp. FIGURES 22–24: LM pictures of Sphaerozosma ; Published as part of Coesel, Peter & Westen, Marien Van, 2013, Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features, pp. 46-54 in Phytotaxa 84 (2) on page 51, DOI:10.11646/phytotaxa.84.2.1, http://zenodo.org/record/5071729