Radula of Okenia barnardi

December 21, 2004
From: Bill Rudman

Here are some scanning electron microscope photos of the radula of Okenia barnardi, which has recently been reviewed (Rudman, 2004).

The radular formula  (20 x 1.1.0.1.1) and shape of the teeth is fairly typical of the Goniodorididae. The innermost tooth has a broad base which extends up into a rounded and distinct dorso-lateral corner, and there is a typical elongate pointed cusp with approximately 20 small, pointed denticles along the cutting edge.  The much smaller outer teeth have a broad triangular shape with a slightly recurved rounded tip.

PHOTOS: SEM photos of radula. A, Section of right side of radular
ribbon. B, close-up, showing fine denticles near tip of inner teeth. Hong Kong, South Ninepin (SE), 19m, 16 March 1986, 19m, AM C149770. Scale bar = 10 µm. Photo: G. Avern.

  • Rudman, W.B. (2004) Further species of the opisthobranch genus Okenia (Nudibranchia: Goniodorididae) from the Indo-West Pacific. Zootaxa, 695: 1-70.

Bill Rudman

Rudman, W.B., 2004 (Dec 21) Radula of Okenia barnardi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/12642

Factsheet

Okenia barnardi

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