Rostanga aliusrubens
- Radula


From Figure 22. Rostanga aliusrubens, radular morphology, AM C150058. A, Central region; B, central region and inner right lateral teeth; C, right lateral teeth; D, E, denticulation on outermost right lateral teeth: F, outermost right lateral teeth. Scale bar = 10 ┬Ám in all cases. Photo G.J. Avern. [Rudman, W.B. & Avern, G.J. (1989). The genus Rostanga Bergh, 1879 (Nudibranchia: Dorididae) in the Indo-West Pacific. Zoological Journal of the Linnean Society 96: 281-338.]

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The radular formula of the holotype is 36.0.36 x 51 (+ 2). The innermost lateral tooth on each side has an elongate triangular blade with a fringe of rounded denticles along the inside edge (Figs A, B). There are three or four sharply pointed denticles on the outside edge at the base of the blade. From Tooth 2 on each side, the teeth have a long pointed cusp with two or three outer denticles about midway along the cusp. These denticles are quite pointed on Tooth 2 but by Tooth 5 they are bluntly rounded before disappearing completely by Tooth 10 (Fig. B, C). The midlateral teeth have smooth hook-like cusps but at about Tooth 15 the tooth changes shape, greatly elongates and develops a set of up to twelve long rod-like terminal denticles similar to the outer teeth of R. arbutus.

Authorship details
Rudman, W.B., 2002 (February 5) Rostanga aliusrubens - Radula. [In] Sea Slug Forum. Australian Museum, Sydney. Available from