FIGURES 13–16 in Taxonomic notes on Dutch desmids V (Streptophyta, Desmidiales): new species, new morphological features

FIGURES 13–16: LM images of Closterium pronum, representing four successive stages of zygospore formation. FIGURE 17: LM image of Closterium pygmaeum. FIGURE 18: LM image of Cosmarium vossenbergense. In all figures, scale bar = 10 µm. ; 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 49, DOI:10.11646/phytotaxa.84.2.1, http://zenodo.org/record/5071729