This species has been observed on Reunion and Madagascar Islands
Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Polyceroidea
Family : Gymnodorididae
Maximal size : 55 mm
Seldom on the fore reef zone
Species characteristics :
The mantle is white with large orange spotted or ringed colour form on hight tubercles.
There are some bifurcated orange or red lines in each gill.
The rhinophores are orange.
|Showing species characteristics...
Photo Maurice Jay
See more about : Sightening and mating periods
Identification confirmed by Nathalie Yonow
Synonymous (according worms) :
- Doris impudica Rüppell & Leuckart, 1830 - Trevelyana impudica (Rüppell & Leuckart, 1830)
- Gymnodoris rubropapulosa (Bergh, 1905) - Trevelyana rubropapulosa Bergh, 1905
Bibliographic data :
It has similarities in colour pattern to G. ceylonica but in G. impudica the orange spots are much larger and more densely arranged, the body is more elongated.
In G.ceylonica there is only one orange or red line in each gill but some bifurcated lines can be observed in G impudica. There are also major anatomical differences
There exist two forms of G. impudica : one with the white background and relatively sparse orange spots, and the other with a more typical animal with translucent background and closer and larger orange spots. Bill Rudman can find no anatomical difference between the two colour forms which can occur together. The orange ornamentation can take a spotted or a ringed colour form.
The gymnodorids are "hunters" and can move at time quite quickly, but they also spend a lot of time meditating...
The only specimen observed in Reunion Island has white background and relatively sparse orange spots, and larger rings. So if you have taken a photo of this colour form or another one in Reunion Island , please Contact us...
Bill Rudman Seaslug site : Sea Slug Forum : Gymnodoris rubropapulosa
Nudipixel Gymnodoris impudica
Bergh, L.S.R. (1905). Die Opisthobranchiata. Siboga Expeditie Report, 50 : 248pp., Pls 1-20.
Yonow N. (2011) Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 15. The suborder Doridina (Mollusca, Gastropoda, Opisthobranchia, Nudibranchia). Zoologische Mededelingen 85(17): 905-956.
Other photos of Gymnodoris impudica :
Madagascar, Nosy bé, 22 m, taille : 30 mm
Philippe Cao Van
Reunion, Saint Leu
Reunion, La saline, less 1 m, 24 November 2011, size : 15 mm
During the night
If you have taken a photo of this colour form or another one in South West Indian Ocean, please Contact us...