cellular organisms >>> Eukaryota >>> Opisthokonta >>> Metazoa >>> Eumetazoa >>> Bilateria >>> Deuterostomia >>> Echinodermata >>> Eleutherozoa >>> Asterozoa >>> Ophiuroidea >>> Myophiuroidea >>> Metophiurida >>> Ophintegrida >>> Amphilepidida >>> Ophiurina >>> Gnathophiurina >>> Amphiuroidea >>> Amphiuridae >>>