Re: Costasiella formicaria from Japan

July 21, 2008
From: Kathe R. Jensen

Concerning message #21718:

Dear Bill & Nishina,

Apparently there are 3 species of Costasiella that feed on the chromophyte Vaucheria rather than Avrainvillea. The 3 species are Costasiella pallida from Hong Kong, Costasiella coronata Swennen 2007 from southern Gulf of Thailand and then apparently also Costasiella formicaria from Japan.

I have just submitted a paper with redescriptions of 3 of Ichikawa's (1993) species of Costasiella (C. paweli, C. usagi and C. kuroshimae ) from Singapore, but it will probably be a year or so before the paper is published.

• Ichikawa, M. (1993) Saccoglossa (Opisthobranchia) from the Ryukyu Islands. Publications of the Seto Marine Biological Laboratory, 36: 119-139.
• Jensen, K.R. 1990. Three new species of Ascoglossa (Mollusca, Opisthobranchia) from Hong Kong, and a description of the internal anatomy of Costasiella pallida Jensen, 1985. In: Proceedings of the Second International Marine Biological Workshop: The Marine Flora and Fauna of Hong Kong and Southern China, Hong Kong, 1986 (Ed. B. Morton), pp.419-432. Hong Kong University Press.
• Swennen, C. 2007. Costasiella coronata, new species, and a revised diagnosis for the family Costasiellidae (Mollusca: Opisthobranchia: Sacoglossa). The Raffles Bulletin of Zoology 55(2): 355-362.

Best wishes,
Kathe

krjensen@snm.ku.dk

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