November 18, 2002
From: Luis Sanchez Tocino
To accompany my earlier messages, here are some more photos of Aldisa banyulensis. These show the radula and the spicules in the mantle.
UPPER RIGHT: Upper photo shows 3 mantle spicules - Scale bar = 50µm. Lower shows the tip of the elongate radular teeth - Scale bar = 5µm
LOWER LEFT: SEM of section of radula showing teeth - Scale bar = 50µm
LOWER RIGHT: SEM of section of radula showing upper half of some teeth - Scale bar = 20µm
Tocino, L.S., 2002 (Nov 18) Aldisa banyulensis - anatomy. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/8443
For those of you unfamiliar with the genus Aldisa, one of its most characteristic features is the shape of the radular teeth. Each transverse row can have up to 100 teeth in each half row, and the teeth are unusually thin and elongate with small denticles on the outside edge, near the tip. There are also a few large recurved denticles right at the tip of each tooth. Soem species can be recognised by the two pockets or pits found in the dorsal midline between the gills and the rhinophores, but this feature is not found in all species.