Bittnerulidae

Cyrtinidae

Dimegelasmidae

Komiellidae

Lepismatinidae

Licharewiidae

Mentzeliidae

Paraspiriferinidae

Pennospiriferinidae

Punctospiriferidae

Rastelligeridae

Reticulariinidae

Sarganostegidae

Sinucostidae

Spiriferellinidae

Spiriferinidae

Spondylospiridae

Suessiidae

Syringothyrididae