listeria cornellensis listeria cornellensis listeria cornellensis is a species of bacteria. it is a gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. it is non-pathogenic. the species was named after cornell university, and its discovery was first published in 2014. listeria cornellensis scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: listeriaceae genus: listeria species: l. cornellensis binomial name listeria cornellensisden bakker et al. 2014 listeria cornellensis is phenotypically similar to listeria grandensis, but is genetically distinct.