Physical Description

Diagnostic Description

Description

Description: arm length to 30 mm, disc diameter to 6 mm. Small species with disc plates of mixed sizes, but radial shields obvious. Plate with comb-like arrangement of spines at base of arm and between arm base and radial shields. Colour uniformly greyish. Habitat: eulittoral and deeper in coral rubble and other coarse substrates. Also distributed in Gilbert Islands, Saipan (Clark, 1954); SE Arabia, Persian Gulf, W India, Pakistan, Ceylon, Bay of Bengal, East Indies, north Australia, Philippine, China, south Japan, South Pacific Is. and Hawaiian Is. (Clark & Rowe, 1971); Australia (Rowe & Gates, 1995). General distribution: WIO, Red Sea to W Pacific (Richmond, 1998); tropical, Indo-west Pacific Ocean, depth range 9-500 m. (Rowe & Gates, 1995). Ecology: benthic, inshore, continental shelf, continental slope (Rowe & Gates, 1995).
  • Tortonese, E. (1977). Report on Echinoderms from the gulf of Aqaba (Red Sea). Italian Journal of Zoology N.S. S. IX(12): 273-290.
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Ecology

Habitat

Depth range based on 165 specimens in 1 taxon.
Water temperature and chemistry ranges based on 48 samples.

Environmental ranges
  Depth range (m): 2.5 - 329
  Temperature range (°C): 9.570 - 28.366
  Nitrate (umol/L): 0.064 - 10.141
  Salinity (PPS): 32.535 - 35.611
  Oxygen (ml/l): 3.255 - 5.824
  Phosphate (umol/l): 0.044 - 0.811
  Silicate (umol/l): 0.728 - 14.741

Graphical representation

Depth range (m): 2.5 - 329

Temperature range (°C): 9.570 - 28.366

Nitrate (umol/L): 0.064 - 10.141

Salinity (PPS): 32.535 - 35.611

Oxygen (ml/l): 3.255 - 5.824

Phosphate (umol/l): 0.044 - 0.811

Silicate (umol/l): 0.728 - 14.741
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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