IUCN threat status:

Not evaluated

Comprehensive Description

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Description

The disc can reach up to 22 mm and is raised at the juncture of the disc and the arm base. The arms do not branch and can attain a length of up to 180 mm (Hendler et al., 1995). The disc and the arms have consecutive rings (annulations) which are brown and cream in colour and formed of ridges bearing hooked arm spines followed by depressed rings of flattened granules. Theses pedicellarial-like hook-shaped spines are present aborally and laterally but are absent on the oral surface. They alternately face in opposite directions along each band. Each spine has a long distal hook with a smaller secondary hook beneath it. The disc has large flattened granules while the radial shields are hidden by the raised junctures of the arms and disc.

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© Coppard , Simon

Source: The Echinoderms of Panama

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