Synallactida

Synallactida is a rankless clade of sea cucumbers, but is referred to as an order.^[1] Taxa within Synallactida were previously classified in an order called Aspidochirotida, which was determined to be polyphyletic in 2017.^[2]

Synallactida
Isostichopus badionotus, in family Stichopodidae
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Holothuroidea
Order:	Synallactida Miller, Kerr, Paulay, Reich, Wilson, Carvajal & Rouse, 2017
Families
See text

List of families

Synallactida includes over 130 species in three extant families and two extinct genera:^[3]

• Deimatidae Théel, 1882 – 3 genera
• Stichopodidae Haeckel, 1896 – 9 genera
• Synallactidae Ludwig, 1894 – 12 genera
• Genus †Collbatothuria Smith & Gallemí, 1991
• Genus †Tribrachiodemas Reich, 2010

• 
  Apostichopus californicus
• 
  Australostichopus mollis
• 
  Isostichopus badionotus
• 
  Stichopus chloronotus
• 
  Isostichopus fuscus
• 
  Thelenota anax