Cyerce and Polybranchia

July 5, 1999
From: Bill Rudman

To accompany the recent messages on the interesting sacoglossans Cyerce elegans and Polybranchia orientalis I have included pages on two other species of the Caliphyllidae.

One species, the spectacularly coloured Cyerce nigricans, is common throughout the Indo-West Pacific and the other, Polybranchia pallens, is endemic to southeastern Australia. It is very similar in shape and colour to Polybranchia orientalis, but differs in having direct developing larvae.

If anyone has a better photo of Cyerce nigricans I would be grateful.

Bill Rudman.

Rudman, W.B., 1999 (Jul 5). Comment on Cyerce and Polybranchia by Bill Rudman. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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