Cetobacterium ceti Foster, Ross, Naylor, Collins, Ramos, Fernandez Garayzabal & Reid, 1996 Propionigenium maris Janssen & Liesack, 1995 Propionigenium modestum Schink & Pfennig, 1982 Psychrilyobacter atlanticus Zhao, Manno & Hawari, 2009