merismopedia merismopedia merismopedia (from the greek merismos and the greek pedion ) is a genus of cyanobacteria found in fresh and salt water. it is ovoid or spherical in shape and arranged in rows and flats, forming rectangular colonies held together by a mucilaginous matrix. species in this genus divide in only two directions, creating a characteristic grid-like pattern. merismopedia merismopedia sp. scientific classification domain: bacteria phylum: cyanobacteria class: cyanophyceae order: synechococcales family: merismopediaceae genus: merismopediameyen, 1839 species m. affixa m. angularis m. artica m. cantonensis m. chondroidea m. convoluta m. danubiana m. duplex m. elegans m. ferrophila m. glauca m. insignis m. litoralis m. marssonii m. minima m. paludosa m. punctata m. quadruplicata m. remota m. revoluta m. revolutivum m. sinica m. smithii m. tenuissima m. thermalis m. trolleri m. venezuelica m. warmingiana