Eventually, Pseudomonas was determined to contain several genera of bacteria, and so in 1990 Pseudomonas facilis, Pseudomonas delafieldii, and several other strains of Pseudomonas and Alcaligenes were transferred to the new genus Acidovorax.
In 1990, it was determined that Pseudomonas encompassed multiple bacterial genera. As a result, in that year, Pseudomonas facilis, Pseudomonas delafieldii, and other strains of Pseudomonas and Alcaligenes were transferred to the genus Acidovorax.