(Aethocrinus,(Colpodecrinus,(Quinquecaudex,(Archaetaxocrinus,(Protaxocrinus,(Cupulocrinus,Polycrinus,((Brechmocrinus,(Ottawacrinus,(Grenprisia,(Agostocrinus,(Plicodendrocrinus,(Compagicrinus,Elpasocrinus)))))),(Merocrinus,Praecupulocrinus)),(Eoparisocrinus,Esthonocrinus,(Porocrinus,(Triboloporus,(Carabocrinus,Palaeocrinus))),(Illemocrinus,Ontariocrinus)),(Dendrocrinus,(Eopinnacrinus,Metabolocrinus))))))));