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Ophiuraster symmetricus

F 84183.

Family - Ophiuridae.



Description

The disc is flat, 3 mm diameter. The radial shields are elongated oval, separated and parallel to one another; 2–3 times long as wide, and length 0.17 times d.d. The dorsal surface is covered by plates, no spines/granules, with a visible diameter of 0.75–0.95 mm, overlapping or touching; primary plates visible.

The ventral interradial surface is plated. The oral shields are cant'distinguish. The adoral shields are can't distinguish. Bursal slits absent. The jaw is as wide as long, with one or two, rounded apical papilla, as wide as long, with thorns. Oral papillae are present along each jaw angle in a series, rounded, thorned. The oral tentacle pore is located inside the jaw, with distal oral papilla similar to other oral papillae or none.

The specimen has five arms, unbranched, basally constricted, 2–3 times d.d. Dorsal arm plates, contiguous, without spines/granules; quadrangular (notched lateral edges), and 1.15–1.65 times long as wide. The second ventral arm plates are separated from the third plate, diamond, and 0.9–1.1 times long as wide. Ventral arm plates of the first free segments separated, diamond, and 0.9–1.1 times long as wide. Tentacle pores along the arm, with no scales. There are 0 arm spines on the first ventral segment, 0 on the first free segments.

Description exported from Delta key and to be finalised when DNA sampling completed. Note species description and image characters may vary slightly in animals of different size within the same species.

Cite this publication as: "T O'Hara (2010). ‘Ophiuroids from deep sea southern Australia. Museum Victoria. Version: 1.0 http://www.museumvictoria.com.au/stars"
Information updated 5 February 2010

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