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Description

Disk small. From four to six long, thin, cylindrical arms (Fig. 10a, b). Abactinal and actinal surfaces granuliform. Two or more madreporites. Abactinal figs rounded, inflated, irregularly arranged. Among these figs there are papular areas with 5–23 pores (Fig. 10c). Papular areas restricted to abactinal surface. Superomarginal and inferomarginal figs similar and uniform in size, separated by a row of papular areas. Actinal figs forming 2–3 series, which extend to the tip of the arms and are covered by granules a little larger than those on abactinal surface. Adambulacral figs with two short, blunt, parallel spines, one being much larger than the other (Fig. 10d). Behind these there is one wide, thick, blunt, ambulacral spine. Oral spines slightly longer (~0.68 mm) than remaining spines, having their tips rounded (Fig. 10e). Ocular figs also granulose.

Colour. Extremely variable, usually juveniles and adults having different colours (Hendler et al. 1995). Juvenile individuals have brown, red or violet spots, while adults are uniformly reddish-brown, yellowish-brown, violet, or olive-green (Brito 1960, Hendler et al. 1995, Benavides-Serrato et al. 2011). In the Brazilian material the most common colour observed is brown and yellow.

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© Anne Isabelley Gondim, Martin Lindsey Christoffersen, Thelma Lúcia Pereira Dias

Source: ZooKeys

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