Rindifilum ramosum, Malavasi & Klimešová & Lukešová & Škaloud, 2022

Malavasi, Veronica, Klimešová, Michala, Lukešová, Alena & Škaloud, Pavel, 2022, Rindifilum ramosum gen. nov., sp. nov., a new freshwater genus within the Ulvales (Ulvophyceae, Chlorophyta), Cryptogamie, Algologie 20 (8), pp. 125-133 : 129-130

Rindifilum ramosum gen. nov., sp. nov.

Rindifilum ramosum gen. nov., sp. nov. with the features of the genus. Thalli up to 0.5 mm consist of prostrate and erected/upright filaments. The vegetative cells of prostrate system are composed by rounded/spherical, pear-shaped or ovoid cells, up to 13.5 µm wide and 13.2 µm long. The pyriform cells of the prostrate system first develop into characteristic “hammer-shaped cells”, up to 77.6 µm long and 33 µm wide. Later on, filaments up to 147 µm long and 4 µm wide are produced. The chloroplast is parietal, usually filling the cell, with a spherical pyrenoid.

HOLOTYPE. — Strain SAG 2052 permanently cryopreserved in a metabolically inactive state (cryopreservation in liquid nitrogen) in the Culture Collection of Algae of the Charles University in Prague (CAUP) as the item CAUP J 1701. Living cultures of the alga are maintained at the SAG, University of Göttingen, Germany, with the strain code SAG 2052 (ex-type culture). Illustrations of the holotype are provided in Figure 3.

TYPE LOCALITY. — Switzerland. Davos Valley, bank of brook Drusatschabächel, 1570 m a.s.l., 46°49’18”N, 9°51’36”E (1000 m).

HABITAT. — Photobiont from lichen Verrucaria margacea (Wahlenb.) Wahlenb.

ETYMOLOGY. — L. neut. adj. ramosum , branching, referring to the morphology of the cells.

Figures

FIG. 3. — Rindifilum ramosum gen. nov., sp. nov. (SAG 2052). Scale bar: 5 μm.