The " Martian " flora: new collections of vascular plants, lichens, fungi, algae, and cyanobacteria from the Mars Desert Research Station, Utah Author Sokoloff, Paul C. Author Freebury, Colin E. Author Hamilton, Paul B. Author Saarela, Jeffery M. text Biodiversity Data Journal 2016 4 8176 8176 http://dx.doi.org/10.3897/BDJ.4.e8176 journal article http://dx.doi.org/10.3897/BDJ.4.e8176 1314-2828--8176 Trebouxia sp. 1 Trebouxia sp. 1 [ T. cf. anticipata Ahm./ T. cf. gelatinosa Ahm./ T. cf. aggregata (Arch.) Gaertner ] Materials Type status: Other material . Occurrence: recordNumber: 249; recordedBy: Sokoloff, Paul C. ; Taxon: kingdom: Plantae; phylum: Chlorophyta; class: Trebouxiophyceae; order: Trebouxiales; family: Trebouxiaceae; genus: Trebouxia; Location: continent: North America; country: United States of America ; countryCode: USA; stateProvince: Utah; county: Wayne County; municipality: Hanksville; locality: Mars Desert Research Station ; verbatimLocality: Vicinity of the Mars Desert Research Station, Hanksville, Utah, 500 m radius of "hab"; verbatimElevation: 1371 m ; verbatimLatitude: 38°24'23.2"N ; verbatimLongitude: 110°47'31.1"W ; coordinateUncertaintyInMeters: 50; Identification: identifiedBy: Hamilton, Paul B. ; dateIdentified: 2016; Event: verbatimEventDate: November 17, 2014 ; habitat: Sandstone; Record Level: institutionID: CMN; collectionID: CANA 117864; collectionCode: CANA, UTC ; basisOfRecord: Dried Specimen Notes Cells spherical to weakly elliptical, 8-15.0 μm in diameter (Fig. 4 a-c; Fig. 6 a). In culture cells were spherical, up to 19 μm in diameter, the cell wall sheath <0.5 μm . Chloroplast plate-like, sometimes lobed, covering most of the cell. One pyrenoid present, at times difficult to distinguish. In the natural population the cell wall sheath was thick, up to 1.5 μm . Colonies of daughter cells tightly packed, forming wedge-shaped colonies in spherical to elliptical clusters. Endolithic, forming a fine linear layer (flake-like) 0.1-0.4 mm below surface of sandstone.