Properties: Rod-shaped bacteria (approximately 0.5–0.6 in diameter and 0.8–1.9 mm in length) with slightly pointed ends. Form a monophyletic group with the SSU rRNA genes of other Deltaproteobacteria from termite guts. Possesses genes coding for production of acetate from CO2 and H2 (Wood–Ljungdahl pathway) and nitrogen fixation. Colonize the cytoplasm of the parabasalid flagellate Trichonympha collaris in the hindgut of the termite Zootermopsis nevadensis.
So far uncultured. The basis of assignment is the SSU rRNA gene sequences of representative phylotypes (Accession No. AB972401; AB894435–AB894480) and hybridization with the specific SSU rRNA-targeted oligonucleotide probe Delta-Tr3-Zn (5'-CTT GAA CCG AAG TTC CTG-3'). A draft genome of strain Adiu1, reconstructed from metagenome sequences, has been deposited in the Integrated Microbial Genomes (IMG) database (IMG Taxon ID: 2556793040) and the GenBank database (LQAA00000000).