Tenuibacter priapulorum Kroer et al. 2016 Universal Root Woese et al. 1990 Bacteria (None 2015) Woese et al. 1990 Proteobacteria (sic) Garrity et al. 2021 Pseudomonadota corrig. Garrity et al. 2021 Alphaproteobacteriota (sic) Garrity et al. 2021 Alphaproteobacteria Garrity et al. 2006 Rickettsiales Gieszczykiewicz 1939 (Approved Lists 1980) emend. Dumler et al. 2001 Tenuibacteraceae Kroer et al. 2016 Tenuibacter Kroer et al. 2016 Tenuibacter priapulorum Kroer et al. 2016 Tenuibacter Kroer et al. 2016 Tenuibacter priapulorum Kroer et al. 2016 Kroer P. Kjeldsen K.U. Nyengaard J.R. Schramm A. Funch P. A Novel Extracellular Gut Symbiont in the Marine Worm Priapulus caudatus (Priapulida) Reveals an Alphaproteobacterial Symbiont Clade of the Ecdysozoa. 2016 7 539 539 Frontiers in Microbiology Front. Microbio. 1664-302X 10.3389/fmicb.2016.00539 27199899 Kroer P. Kjeldsen K.U. Nyengaard J.R. Schramm A. Funch P. A Novel Extracellular Gut Symbiont in the Marine Worm Priapulus caudatus (Priapulida) Reveals an Alphaproteobacterial Symbiont Clade of the Ecdysozoa. 2016 7 539 539 Frontiers in Microbiology Front. Microbio. 1664-302X 10.3389/fmicb.2016.00539 27199899