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This species has been observed on Reunion, Mauritius, Mayotte and Madagascar Islands

Order : Polycladida Suborder : Cotylea Superfamily : Pseudocerotoidea Family : Pseudocerotidae Distribution : Indo West Pacific Maximal size : 60 mm Abundance : Species characteristics : Background colour varie from velvety black to translucent grey or brown with three narrow marginal bands ; inner band bright orange, then a wide clear or grey band and a white rim Pseudotentacles ear-like pointed black with white tips
	Showing species characteristics...	Photo Philibert Bidgrain Reunion, La Saline lagoon, less 1 m, 24 April 2010, size : 30-35 mm

See more about : Pseudobiceros uniarborensis variability in Southwest Indian ocean

Bibliographic data :

P. uniarborensis is originally described as opaque black with three extremely narrow marginal bands. However, this species now appears to show a range of colour patterns ; black with irregular white spot (Western Australia), or semi-transparent brown, semi-transparent brown with irregular white spots (PNG Madang)
      The specimen illustrated in Gosliner & all (1996) from the Philippines shows an extreme colour variation where the dorsal surface is semi-transparent and light brown
      All these animals belong to P. uniarborensis since the marginal banding remains the same
   Presence of a grey-white triangle between pseudotentacles
   Habitat : Found under rubble on the reef crest and slope
   Ethymology : uni = one ; arborensis = place of the tree in honour to One Tree Island
   This species looks like Pseudobiceros hancockanus, Pseudoceros periaurantus and P. periculosus but
            - In P. hancockanus, there is only two distinct marginal bands, the inner band is wide and orange, and the rim is narrow and white
            - In Pseudoceros periaurantus, there is only a distinctive wide brilliant orange marginal band
            - In P. periculosus there is a wide bright orange band and a narrow clear rim

References :

Discover life : Pseudobiceros uniarborensis
   Nudipixel : Pseudobiceros uniarborensis

Publications :

Newman, L.J. & Cannon, L.R.G. (1994). Pseudoceros and Pseudobiceros (Polycladida, Pseudocerotidae) from Eastern Australia and Papua New Guinea. Memoirs of the Queensland Museum 37: 205–266
    Newman, L.J. & Cannon, L.R.G. (1997). Nine new Pseudobiceros (Platyhelminthes, Polycladida, Pseudocerotidae) from the Indo-Pacific. The Raffles Bulletin of Zoology 45: 341–368
    Newman, L.J. & Cannon, L.R.G. (2003). Marine Flatworms: the world of Polyclads. CSIRO Publishing : Melbourne 112 p

Other photos of Pseudobiceros uniarborensis :

Christophe Cadet Reunion, Etang Salé on the rocky coast, less 1 m, 10 October 2009, size : 30 mm A specimen black with irregular white spot (a) like Western Australia specimens.

Marina Poddubetskaia Mauritius, "Grand Aquarium" at Pereybère, 10 m, 17 October 2002, size : 5-7 mm A juvenile specimen

Philibert Bidgrain Reunion, La Saline lagoon, less 1 m, 25 March 2010, size : 45 mm Three narrow marginal bands ; inner band bright orange, then a wide clear or grey band (a) and a white rim

Philibert Bidgrain Mayotte, Mtsanga M'Titi Sada, less 1 m, 20 Jully 2010, size : 40-45 mm Pseudotentacles ear-like pointed black with white tips (a) The dorsal cerebral eyes spot (b) An extra-numerous white dot (c) on the black dorsal background

Philibert Bidgrain Mayotte, Mtsanga M'Titi Sada, less 1 m, 28 Jully 2010, size : 35 mm A specimen with numerous small white dots on the black background.

Philibert Bidgrain Mayotte, Mtsanga M'Titi Sada, less 1 m, 6 Jully 2010 A specimen with a very faint orange marginal border

Alain-Benoît rassat Madagascar, Olaf, Nosy bé, during the night, 14 m, 30 August 2013, size 100 mm Background colour varie from velvety black to translucent grey or brown A very large specimen with a pale brown coloration.

See more about : Pseudobiceros uniarborensis variability in Southwest Indian ocean

 Mayotte, Pseudobiceros uniarborensis with egg mass visible by transparance, at Mtsanga Tsoha, by Philibert Bidgrain