Alcaligenes ruhlandii (Packer and Vishniac) comb, nov., a Peritrichous Hydrogen Bacterium Previously Assigned to Pseudomonas

ATCC 15749, a hydrogen bacterium placed in Hydrogenomonas ruhlandii by Packer and Vishniac (1955) and then transferred to Pseudomonas by Davis et al. (1969), is peritrichous and belongs in the genus Alcaligenes. ATCC 15749 is the type strain of H. ruhlandii Packer and Vishniac, and by reason of its transfer to the genus Alcaligenes, the name of the species becomes Alcaligenes ruhlandii (Packer and Vishniac) comb. nov. It differs from Alcaligenes eutrophus by lacking the ability both to use aromatic compounds and to denitrify and by possessing broad, sheathed flagella.