Coccomyxa greatwallensis Shunan Cao & Qiming Zhou, 2018

Cao, Shunan, Zhang, Fang, Zheng, Hongyuan, Peng, Fang, Liu, Chuanpeng & Zhou, Qiming, 2018, Coccomyxa greatwallensis sp. nov. (Trebouxiophyceae, Chlorophyta), a lichen epiphytic alga from Fildes Peninsula, Antarctica, PhytoKeys 110, pp. 39-50 : 42-43

Coccomyxa greatwallensis Shunan Cao & Qiming Zhou sp. nov. Figures 1 , 2

Holotype.

Strain FACHB-2139, Freshwater Algae Culture Collection, the Institute of Hydrobiology (FACHB-Collection) (Fig. 1a ).

Type locality.

Antarctic, Fildes Peninsula, on soil (62°12.69'S, 58°557.70'W), 40 m a.s.l.; isolated from the Antarctic lichen Psoroma hypnorum (collection No. 274, BIRDS ID: 2131C0001ASBM100076) on 14 February 2014.

Habitat.

Epiphytic green alga, living with lichen Psoroma hypnorum in Sub-Antarctic climate.

Description.

Single-celled green alga, ovoid to long ellipsoidal, asymmetrical, measured 3-5 µm × 6-12 µm, some cells nearly rounded in nutrient-rich PDA medium; cells without mucilaginous sheath (Fig. 1 ). Cell wall smooth, three layers in ultrastructures. Protoplast filled with lipid droplets. Chloroplast parietal, without pyrenoid and with starch granules in the inter thylacoidal spaces. One nucleus in the central part of the cell present. Reproductive process not observed (Fig. 2 ).

Figures

Figure 1. Coccomyxa greatwallensis Shunan Cao & Qiming Zhou, sp. nov., light microphotographs. Cells cultured in BBM medium (a, b) and in PDA medium (c, d). Scale bar: 10 µm.

Figure 2. Ultrastructure of Coccomyxa greatwallensis Shunan Cao & Qiming Zhou, sp. nov. in PDA medium; note: chloroplast (2), plastoglobuli (2), cell wall (3), starch granules (4), thylankoids (5) and mitochondria (6). Scale bar: 0.2 µm.