Organisms This project is focused on fungi in the phylum Mucoromycota, which contains three sub-phyla: Glomeromycotina, Mortierellomycotina and Mucoromycota. There are hypothesized to be the earliest terrestrial transition from biotrophy to saprotrophy in the kingdom of fungi. Physcomitrella patens growing with Mortierella. Close up of Physcomitrella patens. Transmission Electron Micrograph of Mortierella and intracellular Mollicutes-related endobacteria (image taken by Alessandro Desirὸ) A Nannochloropsis oceanica cell sits on a Mortierella elongata hypha the “little arms” on the surface of an algal cell (green) grab the rough surface (brown) of a fungal hypha.