Halofilum helgolandicum Darienko et Pröschold, 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 : 20

Halofilum helgolandicum Darienko et Pröschold sp. nov. ( Fig. 11A–C )

Diagnosis: Filaments are very short, usually not more than 2–8 cells. The filaments are branched, very fragile and easily disintegrate. They can be observed only in very young cultures (not older than several days). After one week of cultivation on the fresh medium, they occur as solitary cells. Cells are pear-shaped with a relatively thick cell wall. The chloroplast is parietal and usually covers 2/3 of the cell. The pyrenoid is present and surrounded by 2–4 large starch grains. Single vegetative cells are 8.0–10.0 μm long × 5.0–6.0 μm wide and uninucleate. Vegetative cells of filaments sometime can reach 14.0–20.0 μm × 4.5–5.0 μm. Reproduction occurs by budding.

Differs from other species by SSU-ITS sequences and reproduction by budding.

Habitat: from an enrichment culture of Rhizoclonium riparium .

Type locality: Heligoland, Germany.

Holotype (designated herein): The strain SAG 2.95 is permanently cryopreserved in a metabolically inactive state (cryopreserved in liquid nitrogen) in the SAG, University of Göttingen , Germany.

Iconotype (designated herein in support of the holotype): Fig. 11B in this study.

ITS-2 DNA Barcode: HAL 2 in Figs S2.

Figures

FIGURE 11. Morphology of A–C. Halofilum helgolandicum SAG 2.95 and D–G. H. ramosum SAG 2050 grown on 1/2SWES medium.