Chromodoris quadricolor group    

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


Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Doridoidea
Family : Chromodorididae
Distribution :
Maximal size :
Abundance :


Species characteristics :

Mantle blue with three or more longitudinal black line.

Marginal yellow, orange or salmon band.

Yellow to orange rhinophores and gills

 

 

 

chromodoris hamiltoni
Showing species characteristics...
Photo
Madagascar, Mayotte and Mohéli

See more about : Chromodoris quadricolor group variability in Southwest Indian ocean

Remarks :

Many species with black lines and an orange border are loosely grouped into the Chromodoris quadricolor colour group (Rudman, 1982) such as Chromodoris africana, C. annae, C. colemani, C. elisabethina, C. hamiltoni, C. kuiteri, C. magnifica, C. michaeli, C. quadricolor, C strigata, Hypselodoris regina ... and many Chromodoris sp...
   Some of them are described from Indian Ocean : C. africana, C. annae, C. elisabethina, C. hamiltoni, C. quadricolor, C. strigata, Hypselodoris regina and many Chromodoris sp...
   All the specimen present in this page belong to this reduced group : C. elisabethina, C. hamiltoni, C. quadricolor or C. sp but it's difficult to conclude

References :

Bill Rudman Seaslug site : Sea Slug Forum : Chromodoris elisabethina
   Bill Rudman Seaslug site : Sea Slug Forum : Chromodoris hamiltoni
   Bill Rudman Seaslug site : Sea Slug Forum : Chromodoris quadricolor
   Bill Rudman Seaslug site : Sea Slug Forum : Chromodoris cf africana
   Nudipixel Chromodoris elisabethina
   Nudipixel Chromodoris hamiltoni
   Nudipixel Chromodoris quadricolor

Publications :

Rudman, W.B. (1977) Chromodorid opisthobranch Mollusca from East Africa and the tropical West Pacific. Zoological Journal of the Linnean Society 61 : 351-397
   Rudman, W.B. (1982). The Chromodorididae (Opisthobranchia: Mollusca) of the Indo-West Pacific: Chromodoris quadricolor , C. lineolata and Hypselodoris nigrolineata colour groups. Zoological Journal of the Linnean Society, 76 : 183-241.

Other photos of Chromodoris quadricolor group :


Pattern 1 : with large black longitudinal lines

Matthias Deuss

Mayotte, ilot d'Hajangoua, 10 m, 13 February 2012, size : 30 mm

 

Pattern 1 caracterized by :
      - Large black lines on the dorsum
      - Large white line between the margin and the black lines

According N. Yonow " looks like C. hamiltoni but too much white along the orange margin... but probably a variant of C. hamiltoni

 

 


Sully Bachel

Madagascar, Ile Sainte Marie, 28 m, October 2008, size : 30 mm

Pattern 1: with large black longitudinal lines


Pattern 2 : with coalescent black longitudinal lines

Florence Ttrentin

Mohéli, Sambia, 19 Octobre 2006

 

Pattern 2 caracterized by :
      - Coalescent black lines on the dorsum
      - Small white line between the margin and the black area

According N. Yonow " No idea...but Rudman considered that their are black variant of C. hamiltoni"

 

 


Freddy Fuentes et Nathalie Geffriaud

Mayotte, 11 May 2006

Pattern 1: with coalescent black longitudinal lines


Françoise Levy

Madagascar,Nosy bé,

Pattern 2 : with coalescent black longitudinal lines


Pattern 3 : with white and pink salmon margin

Olivier Lebris

Mayotte, Nurserie, 10 m, 3 December 2008, size : 25 mm

Pattern 3 caracterized by :
      - A pink salmon margin
      - But also a large internal white margin...

According N. Yonow "With the pink salmon border it could be a variant of C. hamiltoni"

According Bill Rudman " It looks like C. elisabethina, C. hamiltoni and C. quadricolor but the wide white band separating the orange border from the inner black line is unusual. At present I have been calling some of these puzzling forms Chromodoris cf. africana but only as a stop-gap measure until we can make better sense of them. One problem is that in most of these species, juveniles can have quite a wide white band as in your animal"


Alain Barrère

Madagascar, Andavadoaka, 2005

Pattern 2 : with orange to pink salmon border

Mantle blue with a broad pink salmon (a) margin

In this specimen, behind the rhinophores the median dark blue line become dirty orange (b)


Pattern 4 : with deep yellow to orange margin

Alain Barrére

Madagascar, andavadoaka, 2005

Pattern 4 caracterized by :
      - A deep yellow margin

According N. Yonow "May be C. elisabethina because of the yellow border but may be other.... "

 


Sylvain Lebris

Mayotte, "Jardin Japonais", 20 m, 2 December 2008

Pattern 4: with yellow margin


 

Alain-Benoît Rassat

Madagascar, Nosy bé, 20 m, size : 30 mm

According Mary Wakeling : "Looks like C. elisabethina "

 


Pattern 4 : with deep yellow to orange margin

 

 

 

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Madagascar, Andavadoaka, 05

Madagascar, Andavadoaka, 05

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Madagascar, Andavadoaka, 05

Mohéli, Sambia, Oct 06

 


 More photos from Indian Ocean

See more about : Chromodoris quadricolor group variability in Southwest Indian ocean