Jaagichlorella geometrica Reisigl

Darienko, Tatyana & Pröschold, Thomas, 2019, The genus Jaagichlorella Reisigl (Trebouxiophyceae, Chlorophyta) and its close relatives: an evolutionary puzzle, Phytotaxa 388 (1), pp. 47-68 : 65

Jaagichlorella geometrica Reisigl ( Fig. 6T –J‘)

Emended description: Cells are solitary, spherical or slightly irregular. Young cells 3.6–4.2 μm in diameter, mature cells 6.0–8.0 μm. Chloroplast in young cells cup-shaped, in mature cells band-shaped removed from the cell wall, with a single pyrenoid surrounded by several starch grains. Reproduction by unequal sized autospores. Autosporangia between 6.0–10.0 μm in diameter, usually contain 4 autospores.SSU and ITS rDNA sequences (GenBank: MH780944) and ITS-2 Barcode BC- 6 in Fig. 3 .

Lectotype (designated here): Fig. 25 in Reisigl (1964).

Epitype (designated here to support the lectotype): The strain SAG 2549 is cryopreserved in a metabolic inactive state at the Culture Collection of Algae (SAG), University of Göttingen, Germany.

Figures

FIGURE 3. Comparison of the conserved region of ITS-2 among the species of Jaagichlorella and Kalinella. Extraction of this region and translation into a number code for its usage as barcode. The ‘/’ indicated the position of the site loop in Helix III, which we excluded from the barcode. Number code for each base pair: 1 = A-U; 2 = U-A; 3 = G-C; 4 = C-G; 5 = G•U; 6 = U•G; 7 = pyrimidine-pyrimidine mismatch; 8 = deletion, single or unpaired bases. The phylogenetic tree shown was calculated using the neighbor-joining method based on the data set (69 number-coded positions of 11 haplotypes) using PAUP 4.0b10.

FIGURE 6. Morphology and phenotypic plasticity of Jaagichlorella hainangensis (SAG 2360; A.–S.) and J. geometrica (SAG 2549; T.–J’.); scale bar = 10 μm.