[7] Within the family, Faecalibacterium prausnitzii is notable as an abundant commensal bacteria of the human gut microbiota.

[10] A characteristic of this bacterium is the ability to form spores and take on different physical shapes like rods and cocci.

The Oscillospira species are assumed to be slower growers as they are more abundantly found in harder or firmer stools, an indicator of spending more time in the colon before being passed, commonly known as constipation.

Oscillospira in particular has been found to have possible ties to leanness through its 16s rRNA gene in recent gut microbiota studies and has established a connection with a lack of abundance of these bacteria in people impacted with steatohepatitis, a liver disease, and inflammatory bowel diseases such as Chron's and Ulcerative colitis.

[9]In addition, Oscillospira have been shown to ferment complex plant carbohydrates and is being looked at to play a potential role in probiotic production.