achroonema achroonema achroonema is a genus of bacteria with uncertain systematics. achroonema scientific classification domain: bacteria (unranked): incertae sedis genus: achroonemaskuja, 1948 extant species see text the genus was described in 1948 by heinrich leonhards skuja. species: achroonema angustatum (koppe) skuja achroonema articulatum skuja achroonema gotlandicum skuja achroonema inaequale skuja achroonema lentum skuja achroonema macromeres skuja achroonema proteiforme skuja achroonema simplex skuja achroonema spiroideum skuja achroonema splendens skuja achroonema sporogenum skuja achroonema subsalsum behre