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