"Treponema refringens" (Schaudinn and Hofmann 1905) Castellani and Chalmers Dataset NCBI Taxonomy Classification phylum Spirochaetota class Spirochaetia order Spirochaetales family Treponemataceae genus Treponema species Treponema refringens Name Homonyms Treponema refringens "Treponema refringens" (Schaudinn and Hofmann 1905) Castellani and Chalmers