haloplasma haloplasma haloplasma contractile is a halophilic, cell wall-less bacterium. it is the only known representative of a deep lineage, and is classified in its own family (haloplasmataceae) and order (haloplasmatales), in the class mollicutes. in terms of genetics, the bacterium haloplasma contractile contains a dcw gene cluster is responsible for containing all the genes of the organism and promoting peptidoglycan synthesis. also, mreb/mbl are specific homologous parts of this bacterium that are vital in the contractility of the cell. in regards to its physical attributes, this organism consists of a spherical body with approximately two protrusions which alternate between straight and contracted forms. haloplasma contractile scientific classification domain: bacteria phylum: mycoplasmatota class: mollicutes order: haloplasmatalesrainey, da costa, antunes & huber, 2008 family: haloplasmataceaerainey, da costa, antunes & huber, 2008 genus: haloplasmaantunes, rainey, da costa & huber, 2008 species: h. contractile binomial name haloplasma contractileantunes, rainey, da costa & huber, 2008