Marionia sp 1

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This species has been observed on Reunion and Mauritius Islands


Order : Nudibranchia
Suborder : Dexiarchia
Superfamily : Tritonioidea
Family : Tritiniidae
Distribution : Reunion and Mauritius Islands
Maximal size : 25 mm
Abundance : Seldom if ever on the fore reef zone


Species characteristics :

The notum of this this Marionia is orange-brown with a wide clear reticulate network.

The side of the foot are whitish and dotted with brown-orange spots

The branchial plumes "gills", rhinophores and velar tentacles are coloured in purple

marionia sp1
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Sophie Darnis
Reunion, Saint Gilles, 15 m, 26 July 2008, size : 15-20 mm

See more about : Sightening and mating periods

Remarks :

Identification confirmed by Terry Gosliner and Nathalie Yonow

External morphology :

The branchial plumes "gills" are brown-orange to greenish at their bases, becoming clearer where they begin to ramify. The divisions of the "gills" are purple, with the finest terminal divisions tipped in white. The ‘‘gills'' are relatively short. They are dotted with small dark purple spots
    The coloration of the rhinophore sheaths resembles that of the branchial plumes, with some darker red lines or spots approaching the margins.
    The rhinophores each have a terminal projection with numerous branched subterminal excrescences. The shafts of the rhinophores are brown-orange to greenish, the tips of the central clavi colored white.

References :

Bill Rudman Seaslug site : Sea Slug Forum : Tritoniid sp 7

Publications :

 

Other photos of Marionia sp 1 :


 

Sophie Darnis

Reunion, Saint Gilles, 15 m, 26 July 2008, size : 15-20 mm

The coloration of the rhinophore sheaths resembles that of the branchial plumes, with some darker red lines or spots (a) approaching the margins.

 

The rhinophores each have a terminal projection with numerous branched subterminal excrescences. The shafts of the rhinophores are brown-orange to greenish, the tips of the central clavi colored white (b) .


 

Marina Poddubetskaia

L'aquarium de Pereybere, Mauritius, 10 m, 17 October 2002, size : about 25mm.

 

The branchial plumes "gills" are brown-orange to greenish at their bases (a), becoming clearer where they begin to ramify (b). The divisions of the "gills" are purple (c), with the finest terminal divisions tipped in white (d). The ‘‘gills'' are relatively short. They are dotted with small dark purple spots (e)


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