Jaagichlorella terrestris sp. nov. (Trebouxiophyceae, Chlorophyta)—a new species from tropical forest in Vietnam

The genus Jaagichlorella Reisigl (Watanabeales, Trebouxiophyceae) was described in 1964 and revised in 2019. It includes unicellular coccoid green algae. Currently, the genus encompasses ten species and two varieties. The species from this genus inhabit different environments: freshwater, marine and as epiphytes of different natural and artificial substrates. Here, we describe Jaagichlorella terrestris sp. nov. isolated from soil biofilm from tropical forest in Cát Tiên National Park (Vietnam). A polyphasic approach combining morphological analysis, phylogenetic reconstruction, genetic distance evaluation, and CBC species concept was used to investigate the strains of new species. J. terrestris is related to J. sphaerica, but has smaller cells and some molecular differences, including the presence of CBC and hemi-CBCs.