listeria weihenstephanensis listeria weihenstephanensis listeria weihenstephanensis is a species of bacteria. it is a gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. it is non-pathongenic and non-hemolytic. it was discovered in a lemna trisulca plant in a pond in bavaria, germany. the species name reflects the region in which it was first isolated, and was first published in 2013. listeria weihenstephanensis scientific classification domain: bacteria phylum: bacillota class: bacilli order: bacillales family: listeriaceae genus: listeria species: l. weihenstephanensis binomial name listeria weihenstephanensishalter et al. 2013