Hypselodoris yarae Gosliner & Johnson, 2018

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This species has been observed on Reunion, Mayotte and  Madagascar Islands

Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Doridoidea
Family : Chromodorididae
Distribution :  Known only from Madagascar, Mayotte Reunion Mozambique and possibly from Kenya.
Maximal size : 30 mm
Abundance : Frequently on the fore reef zone

Entire dorsal surface light pink to tan, with thick orange band encircling the margin of notum. Marginal band often with undulating margins on inner side.

Notum with series of narrow, opaque white longitudinal lines

Large plum to brown spots located between lines.


hypselodoris yarae
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Photo Yvon Gildas
Mayotten*, Passe en S, 35 m,  23 June 2010

Remarks :

We found in our country 4 species derived from Hypselodoris maculosa complex :  H. bertschiH. juniperaeH. maculosa 

Bibliographic data :

Sides of body and margin of foot same colour as notum.
    Gill branches orange basally, with opaque white apices. Seven to nine unipinnate, well-elevated gill branches present on notum.
    Bulb of rhinophores opaque white, with two prominent orange bands and traces of third band basally. Base of rhinophores translucent white.
    Ethymologie : The name yarae honors Yara Tibiriçá, who has advanced our knowledge of western Indian Ocean nudibranchs and collected several specimens of this species.

References :

Bill Rudman Seaslug site : Sea Slug Forum : Hypselodoris maculosa
   Nudipixel Hypselodoris maculosa

Publications :

Epstein, H. E.; Hallas, J. M.; Johnson, R. F.; Lopez, A.; Gosliner, T. M. (2018). Reading between the lines: revealing cryptic species diversity and colour patterns in Hypselodoris nudibranchs (Mollusca: Heterobranchia: Chromodorididae). Zoological Journal of the Linnean Society. 48: 1-74

Other photos of Hypselodoris yarae :

 More photos from Indian Ocean

Mayotte, Hypselodoris maculosa with large red-orange band, at Sakouli, by Philibert Bidgrain 

Mayotte, Hypselodoris maculosa with "reddish tongues", at Passe en S, by Rozenn Gildas 

Madagascar, try to found the seaslug, at Nosy Bé, by Alain-Benoît Rassat