Article · Wikipedia archive · Last revised Jun 9, 2026

Synallactida

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

Last revised
Jun 9, 2026
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≈ 1 min
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Wikipedia ↗
Synallactida
Isostichopus badionotus, in family Stichopodidae
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Holothuroidea
Order: Synallactida
Miller, Kerr, Paulay, Reich, Wilson, Carvajal & Rouse, 2017
Families

See text

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

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
References

References

  1. Paulay, Gustav (2017). "Synallactida". WoRMS. World Register of Marine Species. Retrieved 2017-11-29.
  2. Paulay, Gustav (2017). "Aspidochirotida". WoRMS. World Register of Marine Species. Retrieved 2017-11-29.
  3. "WoRMS - World Register of Marine Species". www.marinespecies.org. Retrieved 2020-12-15.