Japonacteon suturalis radula

June 15, 2001
From: Bill Rudman

To accompany my comments to Alexander about Japonacteon suturalis here is a pencil sketch I made with the aid of a camera lucida, [pre-SEM days], of the radula of a specimen collected at Armstrong Bch, nr Mackay, Queensland, Australia (Aust Museum AM C69768).

The formula is 6.0.6 with the first tooth on each side of the midline having a reduced cusp with large denticles. Teeth 2-5 have a long pointed cusp with one or two basal denticles on the outside, and Tooth 6 is reduced to a small plate. This is identical to Taki's drawing of the radula of Japonacteon nipponensis, the type of the genus. Compare this with the the radula of P. solidula typical of the genus Pupa in which all the teeth are similar in size and shape.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Jun 15) Japonacteon suturalis radula. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4588

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