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More images | Distribution map | F 52737, 89928. Family - Ophiacanthidae. |
Description The disc is flat, interradial edge petaloid (slightly), 10 mm diameter. The radial shields are covered. The dorsal surface is covered by plates, bearing spines/granules, with a visible diameter of 0.1–0.2 mm, overlapping; primary plates not visible. Disc spines or granules of one type, cylindrical, with 3 terminal points/thorns or multiple, more than 3, terminal points/thorns, and glassy transparent shaft, with thorns in the mid region (sometimes). The spines are up to 0.1–0.2 mm long, and 2–3 times high as wide; densely distributed. The ventral interradial surface is plated. The oral shields are exposed, fan shaped, wider than long. The adoral shields are exposed, extending to lateral edge of oral shield, separated radially, meeting interradially. Bursal slits extend from the oral shield to the disc margin, not bordered by spines or papillae. The jaw is wider than long, with one, pointed or tapering 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 enlarged, and rounded or triangular. The specimen has five arms, unbranched, moniliform or basally constricted (slightly), 7–9 times d.d. Dorsal arm plates, separated, without spines/granules; bell shaped, and 0.85–1 times long as wide. The second ventral arm plates are contiguous with the third plate, diamond or fan-shaped, and 0.7–0.8 times long as wide. Ventral arm plates of the first free segments separated, oval or fan-shaped, some notched distal edge, and 0.7–0.8 times long as wide. Tentacle pores along the arm, with one scale, covering the pore, oval. There are 3–4 arm spines on the first ventral segment, 6–7 on the first free segments. The spines are erect, extending around to the dorsal surface, longest in middle or longest dorsally, and 2–3 times as long as one arm segment, pointed, cylindrical. There are thorns, in longitudinal series on the surface from the base to the tip of the spine, all along the spine, glassy transparent shaft.
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" MUSEUMVICTORIA |