Pseudoceros rubronanus Newman & Cannon 1998

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This species has been observed on Mayotte Island

Order : Polycladida
Suborder : Cotylea
Superfamily : Pseudocerotoidea
Family : Pseudocerotidae
Distribution : Indo West Pacific
Maximal size : 20 mm
Abundance :

Species characteristics :

Background color variable, velvety bright red or red-orange, fushia-pink at margin with irregular white spots or clusters of dots over the entire surface

The white spots are more concentrated in a line along the margin and sometimes in irregular clusters longitudinally and medially


Pseudoceros rubronanus
Showing species characteristics...

Photo Philibert Bidgrain
Mayotte, mtsanga Mboueanatsa, less 1 m, 21 October 2008, size : 8-10 mm

Bibliographic data :

Ventral surface light red
    Body oval with a few marginal ruffles
    Pseudotentacles small bumps.
    Feeding on colonial ascidians
   Habitat : Found at the reef crest under rubble
   Ethymology : rubro = red, nanus = dwarf, for its small size and colour
   Similar to Pseudoceros sp7 but Pseudoceros sp7 have a median irregular white area.


Cerebral eyespot (a) in round clear area with about 6-30 eyes in one row in round clear area
    This species looks like Pseudoceros irretitus but in P. irretitus the background body colour is dark pink-red with a reticulate pattern of fine white lines.

References :

Discover life : Pseudoceros rubronanus
   Marine flatworms of the world : Pseudoceros rubronanus sp 1 and sp 2
   Nudipixel : Pseudoceros rubronanus

Publications :

Newman, L.J. & Cannon, L.R.G. (1998). Pseudoceros (Platyhelminthes, Polycladida) from the Indo-Pacific with twelve new species from Australia and Papua New Guinea. The Raffles Bulletin of Zoology 46: 293323
    Newman, L.J. & Cannon, L.R.G. (2003). Marine Flatworms: the world of Polyclads. CSIRO Publishing : Melbourne 112

Other photos of Pseudoceros rubronanus :



Eva Fontaine

Mayotte, mtsanga Mboueanatsa, less 1 m, 11 Jully 2010, size : 10-15 mm



Eva Fontaine

Mayotte, "Gombé Ndroumé" less 1 m, 21 December 2011, size : 6-8 mm

Cerebral eyespot in round clear area with about 6-30 eyes in one row in round clear area

 More photos from Indian Ocean