Holothuriida

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Kingdom: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Echinodermata
Subphylum: Eleutherozoa
Superclassis: Cryptosyringida
Classis: Holothuroidea
Ordo:
Familiae (2): Holothuriidae – Mesothuriidae

Holothuriida Miller, Kerr, Paulay, Reich, Wilson, Carvajal & Rouse, 2017

• Holothuriida Miller et al., 2017: 124; — Mackenzie et al., 2024: 243.

• Mackenzie, M., Davey, N., Burghardt, I., Haines, M.L. 2024. A report of sea cucumbers collected on the first dedicated deep-sea biological survey of Australia’s Indian Ocean Territories around Christmas and Cocos (Keeling) Islands (Echinodermata: Holothuroidea). Memoirs of Museum Victoria. 83: 207–316. DOI: 10.24199/j.mmv.2024.83.03 . Reference page. 
• Miller, A.K., Kerr, A.M., Paulay, G., Reich, M., Wilson, N.G., Carvajal, J.I. & Rouse, G.W. 2017. Molecular phylogeny of extant Holothuroidea (Echinodermata). Molecular Phylogenetics and Evolution 111: 110–131. DOI: 10.1016/j.ympev.2017.02.014 Reference page.