species: Ophiarachnella infernalis in Lizard Island Field Guide (Lizard Island Field Guide)
Ophiarachnella infernalis

©Anne Hoggett: Ophiarachnella infernalis at Lizard Island

©Anne Hoggett: Underside of Ophiarachnella infernalis at Lizard Island.

©Anne Hoggett: Ophiarachnella infernalis at Lizard Island.
Kingdom Animalia
Phylum Echinodermata
Class Ophiuroidea
Order Ophiurida
Family Ophiodermatidae
Genus Ophiarachnella
Species Ophiarachnella infernalis



Distinguishing features

A small grey/green brittlestar with banded arms, always concealed under rubble. Arms spines are very short and apressed to the arms. The following characteristics cannot be seen in the field. On underside, the oral shields are large and without granules, and each has a supplementary oral shield distal to it. On upper side, the disc is mostly covered with granules. There are five bare plates on the disc near the base of each arm plus at least one other between adjacent arms.


  • Up to 12 cm (Length of specimen) - applies to Diameter including arms

Depth range

  • Depth range data is not yet available.



©Atlas of Living Australia: Australian distribution

Web resources


References that assist with identification

  • Clark, A.M. and F.W.E. Rowe (1971). Monograph of shallow-water Indo-west Pacific echinoderms British Museum (Natural History), London.

Other references

  • Rowe, F.W.E. and J. Gates (1995). Echinodermata in: Zoological Catalogue of Australia. Vol. 33, xiii, 510 pp. Wells, A. (Ed.). CSIRO, Melbourne, Australia.