July 22, 2008
From: Kathe R. Jensen
Concerning message #21723:
After reading my message on the Forum I checked the pictures of Costasiella kuroshimae, and I can say that the specimens I collected in Singapore did not have the orange ring or spot on the cerata, but they do have some iridescent blue spots. It is really difficult to distinguish the species just from dorsal pictures. C. kuroshimae does not have pedal tentacles whereas C. paweli does, and C. paweli from Singapore has the orange ring or spot on the cerata.
firstname.lastname@example.orgJensen, K.R., 2008 (Jul 22) Re: Costasiella formicaria from Japan. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21734
Badly defined species certainly cause problems. Julie Marshall's photos [message #13448] seem to fit Ishikawa's description and some have a golden ring while others don't. There don't seem to be pedal tentacles in her photos either. I will look forward to your paper when it is published.