Phyllidiella cf. rosans (Bergh, 1873)

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This species has been observed on Reunion Island


Order : Nudibranchia
Suborder : Euctenidiacea
Superfamily : Phyllidioidea
Family : Phyllidiidae
Distribution : Reunion
Maximal size : 25 mm
Abundance :

Species characteristics :

The colour of the ridges varies from pale blue, to pale pink

Up to nine rounded, longitudinal pink ridges which are relatively smooth with with surnumerous pink tubercules

A black reticulated pattern is observed in the outer pale blue to pale pink ridge

The stalk of the black rhinophores is pale pink.

 

Phyllidiella rosans F.Trentin

Showing species characteristics...

Photo Christophe Cadet
Reunion, 13 m, size : 25 mm

Remarks :

There is in our region a group of nudibranchs that I will call Phyllidiella meandrina/rosans/zeylanica difficult to identify, for two reasons: on the one hand the existence of many intermediate forms and on the other hand the very marked differences of opinion between specialists about these species ... I finally decided to make a classification (very questionable) of these specimens
            - Group Phyllidiella rosans : There are 6-9 rounded, longitudinal pink ridges which are relatively smooth
            - Group Phyllidiella cf. rosans : Up to nine rounded, longitudinal pink ridges which are relatively smooth with with surnumerous pink tubercules
            - Group Phyllidiella meandrina : In the central part of the mantle there a characteristic pattern of pink to grey-blue rings
            - Group Phyllidiella cf. meandrina : The disposition of the tubercles looks like P. meandrina but there are transverse black area beetween the tubercles all over the notum
            - Group Phyllidiella zeylanica : In adult, up to nine longitudinal pink ridges (broken or interrupted) may occur and medially, presence of a more or less developed network of black band around the tubercles

Bibliographic data :

The foot sole is grey.

Other photos of Phyllidiella cf. rosans :


Florence trentin
Reunion, Dive site "les arches" at Saint Leu, February 2005

 

Les rhinophores sont de couleur noire et chaque clavus rhinophoral possède 12 lamelles P. rosans

Detail of rhinophores

phyllidiella sp F Trentin


phyllidiella sp F.Trentin

Philibert Bidgrain

Reunion, Saint Leu, Les arches, 28 December 2005, size : 20-25 mm

 


phyllidiella sp F.Trentin

Florence Trentin

Reunion, "Banc de sable", at Saint Leu, 20m, 5 August 2004

 

Photo of the foot and underside of this animal

phyllidiella sp F.Trentin


 

 

Florence Trentin

Reunion, Saint Leu, Les Arches, 19 January 2007, size : 25 mm

 


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