Summary Most fungi from the M ucoromycotina lineage occur in ecosystems as saprobes, although some species are phytopathogens or may induce human mycosis. M ucoromycotina represent early diverging models that are most valuable for understanding fungal evolution. Here we reveal the uniqueness of the cell wall structure of the M ucoromycotina R hizopus oryzae and P hycomyces blakesleeanus compared with the better characterized c...