• Cryptobacterium curtum Nakazawa et al., 1999
• Denitrobacterium detoxificans Anderson et al., 2000
• Eggerthella clostridiiformis (Burri & Ankersmit, 1906) Beerens et al., 1962 accepted as Clostridium clostridioforme corrig. (Burri & Ankersmit, 1906) Kaneuchi et al., 1976
• Eggerthella lenta (Eggerth 1935) Kageyama et al., 1999
• Eggerthella lenta (Eggerth 1935) Wade et al., 1999
• Slackia exigua (Poco et al. 1996) Wade et al., 1999
• Slackia heliotrinireducens (Lanigan 1983) Wade et al., 1999