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Smooth Fat Brown Sea Cucumber

Actinopyga Bronn 1860

Actinopyga

provided by wikipedia EN

Actinopyga is a genus of sea cucumbers[1] found in coastal waters in tropical and temperate regions.

Species

This genus is distinctive thanks to its anal teeth (here Actinopyga caerulea). However, some Holothuria can have similar appendages.

There are 18 recognized species:[1]

References

  1. ^ a b c "Actinopyga Bronn, 1860". WoRMS. World Register of Marine Species. 2020. Retrieved 18 March 2020.
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Actinopyga: Brief Summary

provided by wikipedia EN

Actinopyga is a genus of sea cucumbers found in coastal waters in tropical and temperate regions.

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Diagnosis

provided by World Register of Marine Species
Life size from moderate to very large (400 mm) in length; body stout with thick and firm body wall, covered by prominent ambulatory tube feet ventrally and, numerous, modified, elongate tube feet (= “papillae”) dorsally; mouth ventral, surrounded by 15–30 large, peltate tentacles; calcareous ring firm, radial pieces about twice as large as interradial pieces; anus dorsal to terminal, guarded by five, nearly always prominent, heavily calcified terminal tube feet (= “anal teeth”). Ossicles in body wall rosettes and straight to branched, smooth or spiny, rods; tentacles with rods of various sizes and forms, often spiny at extremities; tube feet and papillae with rods and rosettes similar to those of body wall, but often with more complex branched rods; longitudinal and cloacal retractor muscles with rods similar to the simple, smooth ones from the body wall; gonad with rods similar to those of body wall; cloacal wall with spiky rods. Tables, buttons or other ossicle types absent from all tissues. Cuvierian organs present or absent, when present never expelled, non-sticky and composed of three distinct parts: (i) smooth proximal half of trunk, (ii) slightly rugged distal half of trunk, and (iii) highly ragged elongated primary and secondary branches.

Reference

Samyn, Y.; Vandenspiegel, D.; Massin, C. (2006). A new Indo-West Pacific species of Actinopyga (Holothuroidea: Aspidochirotida: Holothuriidae). Zootaxa. 1138: 53-68.

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Appeltans, Ward, W.