Lizard Island Field Guide: Taxonomy: description of species: Unidentified crinoid 2
Unidentified crinoid 2


©Lyle Vail: Crinoid with arms 10 to 12 cm long at Watson's Bay, Lizard Island, 18 metres depth

©Lyle Vail: Crinoid with arms 10 to 12 cm long at Watson's Bay, Lizard Island, 18 metres depth
Kingdom Animalia
Phylum Echinodermata
Class Crinoidea
Order Comatulida
Species Unidentified crinoid 2

Colours

         

Distinguishing features

15 to 20 arms, cirri with up to about 30 segments. IIBr with 4 ossicles, a syzygy between 3rd and 4th.

Size

  • Up to 12 cm (arm length)

Depth range

  • Depth range data is not yet available.

Synonyms

Similar taxa

Comments

This crinoid may be Heterometra crenulata. The species was first recorded from Lizard Island by Messing et al (2006) in the same habitat as the photographed specimen. Unfortunately, the pinnules cannot be seen well enough in the photo to be sure.

The photographed specimen matches the description of Heterometra crenulata in having about 15 robust arms, the second arm division of four ossicles, and about 13 cirri with about 28 segments.

Cannot discount Zygometra comata.

by Anne Hoggett

Distribution

Web resources

References

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

  • Messing, C.G., D.L. Meyer, U.E. Siebeck, L.S. Jermiin, D.I. Vaney and G.W. Rouse (2006). A modern soft-bottom, shallow-water crinoid fauna (Echinodermata) from the Great Barrier Reef, Australia, Coral Reefs, 25: 164-168. LIRS catalog number 956.