Favorinus mirabilis and Favorinus cf. mirabilis

December 15, 2003
From: Marina Poddubetskaia

Dear Bill,
Here are some photos to accompany my messages on Favorinus cf. mirabilis see message 1) and Favorinus mirabilis see message 2) on the same Hexabranchus egg ribbon.

As you can see in the photos both typical Favorinus mirabilis and Favorinus cf. mirabilis were found together. And they really look like two distinct species.
• Favorinus cf. mirabilis can be twice larger in length than Favorinus mirabilis
• the coloration of the body, cerata and rhinophores is very different too

Also, I've seen an egg-mass on this ribbon (visible in centre right photo), but it is impossible to say to which variant / species it belongs to.

Date: November 14, 2003
Location: Mayotte Island, Indian Ocean
Site: Choizil
Depth: 19m

Cordially,
Marina.

nembro@nembro.info

Poddubetskaia, M., 2003 (Dec 15) Favorinus mirabilis and Favorinus cf. mirabilis. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11646

Dear Marina,
I have added some close-ups of your egg ribbon photo to show some of the interesting features.

Upper Right Photo: In the lower left corner we can see 2 small pale F. mirabilis and a large orange F. cf. mirabilis. In the upper right quarter of the photo, parts of 2 or perhaps 3 other specimens of F. cf. mirabilis can be seen nestled in the egg ribbon which they are eating. All over the ribbon cavities sowing eaten out bits of the ribbon are clearly visible.
Centre Left Photo: Showing size difference between the two species
Centre Right Photo: Unidentified white egg ribbon in upper right of photo. Probably from one of these 2 species of Favorinus

Best wishes
Bill Rudman

Rudman, W.B., 2003 (Dec 15). Comment on Favorinus mirabilis and Favorinus cf. mirabilis by Marina Poddubetskaia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11646

Factsheet

Favorinus mirabilis

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