Toward a monograph of non-marine Ulvophyceae using an integrative approach (Molecular phylogeny and systematics of terrestrial Ulvophyceae II.) Author Darienko, Tatyana University of Göttingen, Experimental Phycology and Culture Collection of Algae, Nikolausberger Weg 18, D- 37073 Göttingen, Germany, and Kholodny Institute of Botany, National Academy of Science, Tereschenkivska Str. 2, Kyiv 01601, Ukraine Author Pröschold, Thomas University of Innsbruck, Research Institute for Limnology, Mondseestr. 9, A- 5310 Mondsee, Austria text Phytotaxa 2017 2017-10-06 324 1 1 41 http://dx.doi.org/10.11646/phytotaxa.324.1.1 journal article 10.11646/phytotaxa.324.1.1 1179-3163 Vischerioclonium Darienko et Pröschold gen. nov. Diagnosis: The young thallus consists of an abundance of long branched filaments. Vegetative cells of young filaments are square with parietal chloroplasts, a single pyrenoid and a nucleus. End cells are slightly tapered or slightly pointed. The later thallus starts to form irregular rich prostrate and erect filaments. The mature thallus consists mostly of prostrate pluriserial filaments that easy disintegrate into cell packages, which form a short uniserial part consisting of several cells only at the ends. Vegetative cells in pluriserial filaments are rounded. Reproduction occurs via zoospores, akinetes and disintegrating filaments. Akinetes have thick cell wall without special ornamentation. Zoospore are quadriflagellated and lack a cell wall. Sexual reproduction is not observed. Type species (designated herein): Vischerioclonium submersum Darienko et Pröschold sp. nov. Investigated strains: UTEX 1913 ( Fig. 23 ).