Undulifilum Škaloud, Černajová & Schiefelbein.

Veselá, Veronika, Malavasi, Veronica & Škaloud, Pavel, 2024, A synopsis of green-algal lichen symbionts with an emphasis on their free-living lifestyle, Phycologia 63 (3), pp. 317-338 : 329

Undulifilum Škaloud, Černajová & Schiefelbein.

Undulifilum forms heterotrichous, brush-like thalli composed of irregularly branched uniseriate filaments, that are typically regularly undulating or curved ( Fig. 28 ). The filaments are built out of long cylindrical cells with a single, parietal chloroplast possessing a pyrenoid. In mature thalli, the terminal cells of the branches are often significantly longer. Reproduction occurs by vegetative division. Other modes of reproduction have not been observed. The only described species U. symbionticum lives as a photobiont of Verrucariaceae lichens on seashore rocks ( Černajová et al. 2022).

Figures

Figs 19–30. Lichen photobiont genera (including nonlichenized species) belonging to classes Ulvophyceae and Klebsormidiophyceae. Fig. 19. Cephaleuros virescens (Darienko 2017). Fig. 20. Phycopeltis arundinacea. Fig. 21. Trentepohlia sp. Fig. 22. Blidingia marginata. Fig. 23. Halofilum ramosum (Darienko 2008). Fig. 24. Lithotrichon pulchrum (Darienko 2016b). Fig. 25. Paulbroadya prostrata (Darienko 2016a). Fig. 26. Pseudendoclonium sp. Fig. 27. Rindifilum verrucariae. Fig. 28. Undulifilum symbioticum. Fig. 29. Urospora penicilliformis. Fig. 30. Interfilum terricola. Scale bars: 10 μm (Figs 19, 21-30), 50 μm (Fig. 20).