labrys neptuniae labrys neptuniae labrys neptuniae is a bacterium from the family xanthobacteraceae which has been isolated from the root nodules from the plant neptunia oleracea in taiwan. labrys neptuniae scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: xanthobacteraceae genus: labrys species: l. neptuniae binomial name labrys neptuniaechou et al. 2007 type strain bcrc 17578, ccrc 17578, liujia-146, lmg 23578