Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980) emend. Abt et al. 2012 Dataset NCBI Taxonomy Classification phylum Spirochaetota class Spirochaetia order Spirochaetales family Spirochaetaceae Name Homonyms Spirochaetaceae Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980) emend. Abt et al. 2012 Spirochaetaceae Swellengrebel 1907 (Approved Lists 1980) Spirochaetaceae Schwellengrebel 1907 (Approved Lists 1980) emend. Gupta et al. 2013