(A) Inner lateral teeth, scale = 43 µm, (B) mid-lateral teeth, scale = 60 µm, (C) outer lateral teeth, scale = 75 µm, (D) jaw elements, scale = 25 µm, (E) caryophyllidia, scale = 75 µm. Photo: Darrel Ubick
The jaws are solid, with many rodlets of varying length (D). The radular formulae are 53 x 79.0.79 (10 mm preserved spm) and 54 x 80.0.80 (15 mm preserved spm). The inner lateral teeth are denticulate, each with one small denticle n the outer face of the cusp (A). The teeth gradually increase in size from the inner to the mid-lateral teeth. The mid-lateral teeth are smooth, with long cusps that lack denticles (B). The outer lateral teeth are elongate and slender, but shorter than the mid-laterals. They have a single denticle situated near the apex except the two outermost that have two denticles at the apex (C).
• Garovoy, J.B., Valdés, A., & Gosliner, T.M. 2001. Phylogeny of the genus Rostanga (Nudibranchia), with descriptions of three new species from South Africa. Journal of Molluscan Studies 67: 131-144.
Rudman, W.B., 2002 (February 15) Rostanga phepha - Radula. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/rostpheprad