negativicoccus massiliensis negativicoccus massiliensis negativicoccus massiliensis is a bacterium from the genus of negativicoccus which has been isolated from human faeces. negativicoccus massiliensis scientific classification domain: bacteria phylum: bacillota class: negativicutes order: veillonellales family: veillonellaceae genus: negativicoccus species: n. massiliensis binomial name negativicoccus massiliensistogo et al. 2016 type strain csur p2082, dsm 100853, at7