Rhexinema edaphica Darienko, Pröschold et Lukešová, 2017

Darienko, Tatyana & Pröschold, Thomas, 2017, Toward a monograph of non-marine Ulvophyceae using an integrative approach (Molecular phylogeny and systematics of terrestrial Ulvophyceae II.), Phytotaxa 324 (1), pp. 1-41 : 30-31

Rhexinema edaphica Darienko, Pröschold et Lukešová sp. nov. ( Fig. 19A–G )

Diagnosis: Algae occurs as solitary cells, short 2–4-celled filaments or forms 2–4 packages surrounded by mucilage. The branching is very rudimentary and rare. Single cells are oval, and approximately 6.0–7.0 μm in diameter. Cells in packages are compressed from the sides, and are 5.0–10.0 μm long × 5.0–8.5 μm wide. Cells are uninucleate, with parietal chloroplasts, containing one good visible pyrenoid surrounded by several starch grains. Reproduction occurs by vegetative division. Zoospores are not observed.

Other species of Rhexinema differ by a Chlorosarcinopsis- like morphology and by SSU-ITS sequences.

Habitat: lateritic soil.

Type locality: Brazil, central part of Sao Paulo State, Sao Carlos, Itirapina and Pirissanunga County, elevation of about 800 m a.s.l., field of sugar cane, dense canopy, without any ground layer.

Holotype (designated herein): The strain ULVO-10 is permanently cryopreserved in a metabolically inactive state (cryopreserved in liquid nitrogen) in the SAG, University of Göttingen , Germany.

ITS-2 DNA Barcode: RHE 4 in Figs S2.

Figures

FIGURE 19. Morphology of Rhexinema edaphica ULVO-10 grown on MiEB12 medium. A–E. cells packets and rudimentary branching, F,G. single cells and packets surrounded by common mucilage contrasted by indian ink.