diplocalyx diplocalyx diplocalyx is a genus of bacteria of the spirochete phylum. the genus was originally established in 1968 on the basis of differential morphology when compared to other spirochete species. no species within it has been successfully grown in culture. up to now there is only on species of this genus known (diplocalyx calotermitidis). diplocalyx scientific classification domain: bacteria phylum: spirochaetota class: spirochaetia order: spirochaetales family: spirochaetaceae genus: diplocalyxgharagozlou 1968 ex bermudes et al. 1988 type species diplocalyx calotermitidisgharagozlou 1968 ex bermudes et al. 1988 species d. calotermitidis "d. cryptotermitidis"