Tamanovalva limax
Kawaguti & Baba, 1959

Superfamily: OXYNOOIDEA
Family: Juliidae


Known only from Japan, but possibly has a wider distribution.


Hachijo Island Japan, Depth: 8m, Length: 5mm. Photos: Nishina Masayoshi

This animal was the first living bivalved gastropod to be discovered. Shells of related animals had been known from both fossil and recent deposits and had usually been considered to be an unusual bivalve although some authors had noted the gastropod like larval shell on one valve. There is some uncertainty about which generic names should be used for this species. This is discussed in a separate message. It is reported to feed on Caulerpa okamurai.

• Kawaguti, S. & Baba, K. (1959) A preliminary note on a two-valved sacoglossan gastropod, Tamanovalva limax, n. gen., n. sp., from Tamano, Japan. Biol. J. Okayama Univ. 5(3-4): 177-184.
• Baba, K (1961) On the identification and the affinity of Tamanovalva limax, a bivalved sacoglossan mollusc in Japan. Publications of the Seto Marine Biological Laboratory, 9: 37-62, Pls 1-4.
• Baba, K. (1961) The shells and radulae in Berthelinia, a bivalved sacoglossan genus. Venus, The Japanese Journal of Malacology, 21: 389-401, text-figs 1-4, Pl. 21.

Authorship details
Rudman, W.B., 2002 (March 11) Tamanovalva limax Kawaguti & Baba, 1959. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/tamalima

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  4. Another photo of Tamanovalva limax
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