Synechocystis nigrescens, nom. inval. Dataset NCBI Taxonomy Classification phylum Cyanobacteriota class Cyanophyceae order Synechococcales family Merismopediaceae genus Synechocystis species Synechocystis nigrescens Name Homonyms Synechocystis nigrescens Synechocystis nigrescens, nom. inval.