paraprevotella paraprevotella paraprevotella is a gram-negative, non-spore-forming, pleomorphic and anaerobic genus of bacteria from the family of prevotellaceae. paraprevotella clara and paraprevotella xylaniphila have been isolated from human faeces. paraprevotella scientific classification domain: bacteria phylum: bacteroidota class: bacteroidia order: bacteroidales family: prevotellaceae genus: paraprevotellamorotomi et al. 2009 species p. clara p. xylaniphila