longicatena longicatena longicatena is a genus from the family of erysipelotrichidae with one known species (longicatena caecimuris). longicatena caecimuris has been isolated from the caecal content from a mouse from freising in germany. longicatena scientific classification domain: bacteria phylum: bacillota class: erysipelotrichia order: erysipelotrichales family: erysipelotrichaceae genus: longicatenalagkouvardos et al. 2016 type species longicatena caecimuris species l. caecimuris