Petalifera petalifera from Croatia

May 12, 2005
From: Andrej Jaklin

Dear Bill,
Help me out on this, I got pictures from colleague of mine. Is this Phyllaplysia lafonti or Petalifera petalifera? Both species are mentioned as found in the Adriatic Sea but have never seen neither one nor the other alive.

Locality: middle Adriatic, Croatia. Depth: unrecorded. Length: approx. 20 mm. Caulerpa taxifolia settlement. Photographer: A. Zuljevic

Thank you,

Jaklin, A., 2005 (May 12) Petalifera petalifera from Croatia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Andrej,
Thanks for sharing this problem, as in trying to resolve it for you, I think I solved a puzzle I have been avoiding for some time. You and I are not the first people to be puzzled by just what these two species are. In an earlier message [#8652] I show P. lafonti  has been mistaken for Syphonota geographica. In my comments on that I posted a copy of the original illustration of Phyllaplysia lafonti, but in a later [message #9017] I followed Ocana, (2000)  in identifying a species as Petalifera petalifera, which actually fitted the original description of P. lafonti very well, .

As I discuss separately, [message #13719 ] your animal is the real Petalifera petalifera. We already have some good photos of it from Turkey [message #11241 ].

Best wishes,
Bill Rudman

Rudman, W.B., 2005 (May 12). Comment on Petalifera petalifera from Croatia by Andrej Jaklin. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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