This species has been observed on Reunion, Mayotte, Mauritius and Madagascar
Order : Nudibranchia
Suborder : Dexiarchia
Superfamily : Aeolidioidea
Family : Facelinidae
Distribution : Okinawa, Papua new Guinea, Indonesie and south west of indian ocean
Maximal size : 25 mm
Abundance : Seldom on the fore reef zone and the rocky coast
Species characteristics : The oral tentacles, the body and the cerata are translucent orange, only the tips of the cerata are white to pale orange
The perfoliate rhinophore are dark violet to purple brown
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Showing species characteristics... |
Photo Monika Bachel
Reunion, "Cap La Houssaye", Saint Paul, 8 m, 14 January 2009, size : 20-25 mm
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See more about : Sightening and mating periods
Remarks :
Identification confirmed by Hsini Lin and Bill Rudman
This species could be a new species or an undescribed color variation of Favorinus mirabilis with orange coloration
Bibliographic data :
They have yellow-orange digestive gland ducts in the cerata
The anterior foot corners are prominent, being enlarged into long large tentacles
There is similarities with Favorinus tsuruganus but in F. tsuruganus the body and the oral tentacles are opaque white and there is a black tip to the cerata.
Also the rhinophores have numerous leaflets, rather than the three "cup-shaped swellings" found in F. tsuruganus
References :
Bill Rudman Seaslug site : Sea Slug Forum : Favorinus cf mirabilis
Publications :
Baba, K. (1955) Opisthobranchia of Sagami Bay. Supplement . Iwanami Shoten, Tokyo
Other photos of Favorinus cf mirabilis :
Monika Bachel
Reunion, "Cap La Houssaye", Saint Paul, 8 m, 14 January 2009, size : 20-25 mm
3 specimens on an Hexabranchus sanguineus mass egg
(a) The perfoliate rhinophore
(b) They have yellow-orange digestive gland ducts in the cerata
(c) The anterior foot corners are prominent, being enlarged into long large tentacles |
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One of the specimen found in this mass egg
Size : 22-25mm |
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Marina Poddubetskaia
Mauritius, "Malen", Pereybère, 18 m, 18 October 2002, size 15 mm
According Bill Rudman "
This photo clearly shows the dark reddish spot near the tip of each cerata, which is characteristic of Favorinus mirabilis. One vote in favour of it being considered just a colour variation of that speces"
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More photos from Indian Ocean
Reunion, six Favorinus cf mirabilis in a spawn of Hexabranchus, at Gilles, by Philibert Bidgrain
Mauritius, Favorinus cf mirabilis, at Trou aux biches, by Richard Lai cheong
Madagascar, a small group of Favorinus cf mirabilis crawling on Halimeda sp, at Nosy Be, by Sully Bachel
Reunion, 3 Favorinus cf mirabilis get lost on the substrate, at La Possession, by Erwan Meyer
Madagascar, head detail of Favorinus cf mirabilis, at Nosy Bé, by Alain-Benoît Rassat
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