acetitomaculum acetitomaculum acetitomaculum is a genus in the phylum bacillota (bacteria). the single species is an acetogenic bacteria from the bovine rumen. acetitomaculum scientific classification domain: bacteria phylum: bacillota class: clostridia order: eubacteriales family: lachnospiraceae genus: acetitomaculum type species a. ruminis species acetitomaculum ruminis history the genus acetitomaculum was originally created to describe strains of bacteria isolated from a mature hereford crossbred steer fed a typical high forage diet. they were isolated in a screen for acetate-producing bacteria extracted from the steer rumen. etymology the name of the genus is derived from the latin noun acetum, meaning vinegar, combined with the latin noun tomaculum, a kind of sausage. together they form acetitomaculum, literally a kind of vinegar sausage. the name of the type species, a. ruminis is derived from the latin genitive noun ruminis, meaning "of the rumen". characteristics members of acetitomaculum are gram-positive rods which can utilize formate, glucose, and carbon monoxide. the genus contains a single species, a. ruminis, which is the type species of the genus.