the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Echinodermata (phylum)
Echinozoa (superclass)
Holothurioidea (class)
Aspidochirotacea (subclass)
Aspidochirotida (order)
[hide inferior taxa]
Holothuriidae (family)
Stichopodidae (family)