Goniobranchus rubrocornutus    (Rudman, 1985)

Version française...

This species has been observed on Reunion Island

Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Doridoidea
Family : Chromodorididae
Distribution : Westren Pacific and Reunion Island
Maximal size : 15 mm
Abundance : Seldom if ever on the reef

Species characteristics :

The rhinophores and gills are reddish

It has a broad yellowish orange to darker apricot-red marginal band then a red or pink to purple band which broadens then narrows along its inner edge to give a red pink to purple scalloped pattern. Inside that again is a narrow, opaque white line.

goniobranchus rubrocornutus
Showing species characteristics...
Photo Kevin Bourdon
Reunion, Cap la Houssaye, 10 m, 26 June 2013, size : 3 mm

See more about : Sightening and mating periods

Remarks :

Identification proposed by Nathalie Yonow and Garry Cobb (who considered that it's a juvenile form...)
    Synonymous : (according Worms)
          - Chromodoris rubrocornuta, Rudman, 1985

Bibliographic data :

This is one of the many species of Chromodorids which are white with either red, yellow or orange mantle borders, or a combination of two or three bands...
   Some specimens lack any red or pink to purple spots/streaks on the inner side of the orange marginal band.
   Some specimens with white rhinophoral lamellae
   Its name is derived from its red rhinophores

References :

Bill Rudman Seaslug site : Sea Slug Forum : Chromodoris rubrocornuta
   Nudipixel Goniobranchus rubrocornutus

Publications :

Johnson R.F. & Gosliner T.M. (2012) Traditional taxonomic groupings mask evolutionary history: A molecular phylogeny and new classification of the chromodorid nudibranchs. PLoS ONE 7(4): e33479
   Rudman, W.B. (1985) The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Chromodoris aureomarginata, C. verrieri and C. fidelis colour groups. Zoological Journal fo the Linnean Society, 83 : 241-299.
   Rudman, W.B. & Darvell, B.W. (1990) Opisthobranch molluscs of Hong Kong. Part 1. Goniodorididae, Onchidorididae, Triophidae, Gymnodorididae, Chromodorididae, (Nudibranchia). Asian Marine Biology, 7 : 31-79

Other photos of Goniobranchus rubrocornutus :

 More photos from Indian Ocean

If you have taken a photo of this species in South West Indian Ocean, please Contact us...