Biology:Polycheira

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Polycheira is a genus of holothurians (sea cucumbers) found in tropical Indo-Pacific.

A curious pattern of reproduction has been found in Polycheira rufescens where specimens change their sex from male to female and from female to male in a reproductive season [1]

Systematics

Polycheira appear to be closely related to the genus Chiridota (both belong to the subfamily Chiridotinae).[2] The type species of the genus is Polycheira rufescens (Brandt, 1835).

The following species are recognised in the genus Polycheira:[3]

  • Polycheira echinata Heding, 1928
  • Polycheira nusalaut Setyastuti & Lüter, 2026[4]
  • Polycheira rufescens (Brandt, 1835)


References

  1. Arakaki,S. et al.,Sex change and spatial distribution pattern in an intertidal holothurian Polycheira rufescens in the reproductive season. Res. Popul. Ecol. 1999, vol. 41, No 3
  2. Kerr,A.M. Phylogeny of the Apodan Holothurians (Echinodermata) inferred from morphology. Zoological Journal of the Linnean Society (2001), 133
  3. MarineSpecies.org - Polycheira
  4. Setyastuti, A., & Lüter, C. (2026). The sea cucumber order Apodida (Echinodermata: Holothuroidea) from Indonesia: description of a new species and species checklist. Raffles Bulletin of Zoology, 74, 165–196. https://doi.org/10.26107/RBZ-2026-0014

Wikidata ☰ Q7226203 entry