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 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


Okenia barnardi

Related messages

  1. Okenia cf. barnardi from Ratnagiri, India.
    From: Vishal Bhave, January 20, 2010
  2. Okenia barnardi laying eggs in Korea
    From: Dong Bum Koh, February 4, 2005
  3. Okenia barnardi from Japan
    From: Yukari Sato, November 25, 2003
  4. Okenia barnardi from Hong Kong
    From: Bill Rudman & Brian Darvell, January 12, 2002
  5. Okenia barnardi from Hong Kong
    From: Bernard Picton , January 12, 2002
  6. Food of Okenia barnardi in Hong Kong
    From: Bernard Picton , January 12, 2002

Show factsheet and all related messages