Jaagichlorella Darienko & Pröschold.

Jaagichlorella possesses uninucleate solitary, usually spherical cells with one saucer-like (in young cells) or band-like (mature cells) chloroplast containing a single pyrenoid (Fig. 6; Darienko & Pröschold 2019). Recently, the tropical genus Heveochlorella was synonymized with Jaagichlorella (Darienko & Pröschold 2019), but this taxonomic treatment was overlooked by some authors (Lindgren et al. 2020; Sanders & Masumoto 2021). The genus is an important member of algal communities in the tropical phyllosphere (Zhu et al. 2018) and represents the most common genus of photobionts of Sticta (Lindgren et al. 2020) . According to Sanders et al. (2016), Jaagichlorella can be easily cultivated and probably exhibits both lichenized and free-living lifestyles. Further support for this view is direct observations conducted on plastic coverslips (Sanders 2014; Sanders & Masumoto 2021).