Cell squash highlighting Trebouxia sp. 2 with solid flattened chloroplast plates extending across the cell. Pyrenoid present in 6 cells. Cell wall <0.8 μm thick.   
  Part of: Sokoloff P, Freebury C, Hamilton P, Saarela J (2016) The "Martian" flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah. Biodiversity Data Journal 4: e8176. https://doi.org/10.3897/BDJ.4.e8176