Costasiella from the Philippines

May 9, 2002
From: Erwin Koehler


Dear Bill,
Here are the next shots from the Philippines,
Negros Oriental Island, Lipayo, divesite
"Dauin".

Sizes: Upper: 4mm, Lower: 3mm
Depth: 7m
08.March 2002.

Erwin

Erwin@medslugs.de

Koehler, E., 2002 (May 9) Costasiella from the Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6637

Note: Moved to Costasiella sp. 3. See relevant message. - 2 April 2003

Dear Erwin,
I am pretty sure this is a species of Costasiella but I can't see the position of the eyes in your photos to be sure. If it is that genus there are a couple of species described from Japan which are quite close but not exactly the same.
Costasiella paweli was described with black rhinophores, head and tail white, cerata green with white tips and spotted with black specks.
C. kuroshimae has white rhinophores with white tips and the cerata are generally green with white tips.
Both species were described by Ichikawa (1993) from a few specimens. At present we do not know how variable in colour species of Costasiella but at present I can't really identify your animals with any named species.

• Ichikawa, M. (1993) Saccoglossa (Opisthobranchia) from the Ryukyu Islands. Publications of the Seto Marine Biological Laboratory, 36: 119-139.

Best wishes,
Bill Rudman

Rudman, W.B., 2002 (May 9). Comment on Costasiella from the Philippines by Erwin Koehler. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6637

Factsheet

Costasiella sp. 3

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