Pleuromonadidæ (ploromonadide)

pl. [ NL., typified by the genus Pleuromonas. These animalcules are free-swimming, and naked or ill or i cate, and have a single lateral or dextral flagellum and no distinct oral aperture. Pleuromonas (plö-rom'ō-nas), n. [NL., πλευρά, the side, + NL. Monas, pleuron (plöʻron), n.; pl. pleura (-ri). [NL., side, called from their position the pro pleuron, mesopleus ron, and meta pleuron, their respective on the prothorax, mesothorax, and metathorax.