acidaminococcus acidaminococcus acidaminococcus is a genus in the phylum bacillota (bacteria), whose members are anaerobic diplococci that can use amino acids as the sole energy source for growth. like other members of the class negativicutes, they are gram-negative, despite being bacillota, which are normally gram-positive. acidaminococcus scientific classification domain: bacteria phylum: bacillota class: negativicutes order: acidaminococcales family: acidaminococcaceae genus: acidaminococcusrogosa 1969 type species a. fermentansrogosa 1969 species a. fermentans a. intestini "a. massiliensis" "a. provencensis" "a. timonensis" etymology the name acidaminococcus derives from:neo-latin noun acidum (from latin adjective acidus, sour), an acid; neo-latin adjective aminus, amino; neo-latin masculine gender noun coccus (from greek masculine gender noun kokkos (κόκκος), grain, seed), coccus-shaped; neo-latin masculine gender noun acidaminococcus, the amino acid coccus. phylogeny the currently accepted taxonomy is based on the list of prokaryotic names with standing in nomenclature (lpsn) and national center for biotechnology information (ncbi) 16s rrna based ltp_01_2022 gtdb 07-rs207 by genome taxonomy database a. intestini a. fermentans a. intestini jumas-bilak et al. 2007 "a. provencensis" takakura et al. 2019 "a. timonensis" ricaboni et al. 2017 a. fermentans rogosa 1969 "a. massiliensis" ricaboni et al. 2017