The type species of this genus has alternatively been placed in the genus "Candidatus Microthrix" Blackall et al. 1996.Publication:
Blackall LL, Stratton H, Bradford D, Dot TD, Sjorup C, Seviour EM, Seviour RJ. "CandidatusMicrothrix parvicella", a filamentous bacterium from activated sludge sewage treatment plants. Int J Syst Bacteriol 1996; 46:344-346.
The e-mail address of the corresponding author given in the effective publication is not functional any more.
Number of child taxa with a validly published and correct name: 0 Number of child taxa with a validly published name, including synonyms: 0 Total number of child taxa: 2