Opinions from N. S. Rogalla and M. R. W. Amler 2006
- 'Avalanchia belongs to Iapetocardiinae'
- 'Avalanchia pterocarina belongs to Avalanchia'
- 'Baiosoma belongs to Pseudobigaleaidae'
- 'Bigalea belongs to Bigaleinae'
- 'Bigalea aviformis belongs to Bigalea'
- 'Bigalea buskasi is recombined as Redstonia buskasi'
- 'Bigalea ohioensis belongs to Bigalea'
- 'Bigalea tercierae is recombined as Redstonia tercierae'
- 'Bigalea visbyensis is recombined as Redstonia visbyensis'
- 'Bigalea yangi belongs to Bigalea'
- 'Bigaleinae belongs to Pseudobigaleaidae'
- 'Bitrigonocardia belongs to Bitrigonocardiinae'
- 'Bitrigonocardiinae belongs to Pseudobigaleaidae'
- 'Cassowarioides belongs to Iapetocardiinae'
- 'Cassowarioides anisomorpha belongs to Cassowarioides'
- 'Cassowarioides perryi belongs to Cassowarioides'
- 'Cassowarioides polgari belongs to Cassowarioides'
- 'Cassowarioides stelcki is a subjective synonym of Cassowarioides perryi'
- 'Cassowarioides whitei belongs to Cassowarioides'
- 'Conocardium dorsatum is recombined as Bitrigonocardia dorsata'
- 'Conocardium elegantulum is recombined as Bitrigonocardia elegantula'
- 'Bitrigonocardia lindstromi is a subjective synonym of Bitrigonocardia elegantula'
- 'Conocardium reticulatum is recombined as Bitrigonocardia reticulata'
- 'Exalloschema is a subjective synonym of Baiosoma'
- 'Hadropipetta belongs to Pseudobigaleainae'
- 'Hadropipetta nevadensis is corrected as Hadropipetta nevadaensis and belongs to Hadropipetta'
- 'Hippocardia ancora is recombined as Hadropipetta ancora'
- 'Hippocardia batilia is recombined as Baiosoma batilia'
- 'Hippocardia cooperi is recombined as Iapetocardia cooperi'
- 'Hippocardia pala is recombined as Baiosoma pala'
- 'Iapetocardia belongs to Iapetocardiinae'
- 'Iapetocardiinae belongs to Pseudobigaleaidae'
- 'Kandosoconcha belongs to Pseudobigaleainae'
- 'Kandosoconcha pembertoni belongs to Kandosoconcha'
- 'Nehedia belongs to Pseudobigaleainae'
- 'Nehedia bainsi belongs to Nehedia'
- 'Nehedia bergeraci belongs to Nehedia'
- 'Nehedia grovesi belongs to Nehedia'
- 'Nehedia restricta belongs to Nehedia'
- 'Nehedia tricarina belongs to Nehedia'
- 'Pleurorhynchus diptera is recombined as Bitrigonocardia diptera'
- 'Pseudobigalea belongs to Pseudobigaleainae'
- 'Pseudobigalea crista belongs to Pseudobigalea'
- 'Pseudobigaleainae belongs to Pseudobigaleaidae'
- 'Redstonia belongs to Pseudobigaleainae'
- 'Redstonia knaeckei belongs to Redstonia'