South temperate Australia from Bass St to southwestern Australia.
UPPER: American River, 3m, off boat ramp, E.Kangaroo Is, South Australia, 14 March 1978. Photo: R. Kuiter
LOWER: Point Turton Jetty, South Australia, 25 February 2001., 12 mm long. On Caulerpa brownii at 3.5m depth. Photo: John Chuk.
Only species in the genus Roburnella which is related to Oxynoe and Lobiger. As in those animals, R. wilsoni has a thin shell partly enclosed by parapodia. The edge of the parapodia bear two structures on each side, which are sometimes rolled into tubes, and sometimes unrolled into spoon-shaped lobes. It is associated with,and presumed to feed on the green algae Caulerpa brownii, Caulerpa scalpelliformis, and Caulerpa remotifolia.
• Tate, R. (1889). Description of some new species of marine mollusca from South Australia and Victoria. Transactions of the Royal Society of South Australia, 11: 60-66.
Rudman, W.B., 2001 (June 28) Roburnella wilsoni (Tate, 1889). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/robuwils