Sagaminopteron psychedelicum   Carlson & Hoff, 1974

This species has been observed on Reunion and Mayotte Islands


Order : Cephalaspidea
Superfamily : Philinoidea
Family : Gastropteridae
Distribution : Originally described from Guam, this animal is now known from many parts of the tropical western Pacific
Maximal size : 20 mm
Abundance : Frequently on the reef flat zone and the fore reef zone


Species characteristics :

The prominent dorsal hump is partially enclosed by the parapodia, but the translucent gills are visible. They look like wingy expansions forming three wide folds when resting
    Also diagnostic is the upturned and greatly extended posterior end of the cephalic shield.
   The mantle is blue-green with area surrounding by a dense black line
   The colour of these area varies from cream to grey in the center to orange to yellow on the fringe
   A wide cream to yellowish band around the mantle edge.

Sagaminopteron psychedelicum
Showing species characteristics...

Photo Philibert Bidgrain
Reunion, Etang Salé lagoon, less 1 m, 25 September 2004, Size : 10 to 15 mm

See more about : Sightening and mating periods
   See more about : Sagaminopteron psychedelicum variability in Southwest Indian ocean

Remarks :

Identification confirmed by Bill Rudman and Nathalie Yonow
    According Nathalie Yonow (2008), the tip of the siphon is bright red in pacific specimen, even in juveniles, but this red pigment is absent in the individuals from the Red Sea and Réunion. So she speak of Sagaminopteron cf psychedelicum
    Synonymous : (according Worms)
               - No other name

Bibliographic data :

Given its name for its bright and colourful colour pattern, this species is not as spectacular a swimmer as Sagaminopteron ornatum
    In most sea slugs the eyes are difficult to see because they are beneath the skin on the inside edge of the body wall. Quite a few species, like Sagaminopteron psychedelicum, have a semitransparent or translucent patch above each of the eyes (black spot) so some light can get through.
    This species feeds upon sponges. In shallow water (intertidal zone to 3 m) it feeds upon the rubbery green sponge, Dysidea cf herbacea (photo 42 in Coral Reef Animals of the Indo-Pacific. T.M. Gosliner). In deeper water (1 to 25 meter) it is found upon the gray sponge,Dysidea sp together with Sagaminopteron nigropunctatum.

References :

Site de Bill Rudman : Sea Slug Forum : Sagaminopteron psychedelicum
    Nudipixel Sagaminopteron psychedelicum

Publications :

Carlson, C.H. & Hoff, P.J. (1974) The Gastropteridae of Guam, with descriptions of four new species (Opisthobranchia: Cephalaspidea). Publications of the Seto Marine Biological Laboratory, 21(5/6) : 345-363.
    Gosliner T.M. (1989) Revision of the Gastropteridae (Opisthobranchia: Cephalaspidea) with descriptions of a new genus and six new species. The Veliger 32(4): 333-381.
    Yonow,N (2008) Seaslugs of the Red Sea, Pensoft Publishers

Other photos of Sagaminopteron psychedelicum:


Philippe Bourjon

Reunion, March 2018

Pattern diversity of the sole...


Sagaminopteron psychedelicum

Philippe Bourjon

Reunion, March 2018

Being stressed, this animal leaves a trail of white mucus (a) on the substrate. The musus made by mantle glands.


 

Philibert Bidgrain

Reunion, Etang Salé lagoon, less 1 m, 25 September 2004, Size : 10 to 15 mm

Specimen laying these eggs, during the day, under dead coral.

In this photo you can observe a filament with little white eggs...

 

 

Two other specimen ( 5-10 mm and 15-20 mm) have been observed in November...in the same lagoon

 

Sagaminopteron psychedelicum P.Bidgrain


Sagaminopteron psychedelicum

Fabrice Schubert

Mayotte, Sakouli, 4m, 20 November 2009, size : 30 mm

In this specimen, the wingy expansions forming three wide folds when resting, are mottled with black and yellowish (a)

The tip of the siphon (b) is bright red in pacific specimen, even in juveniles, but this red pigment is absent in the individuals from Réunion.


Philibert Bidgrain

The black spot is the eye. Quite a few species, like S. psychedelicum , have a semitransparent or translucent patch above each of the eyes so some light can get through.

Sagaminopteron psychedelicum P.Bidgrain

Reunion, Etang Salé lagoon (11 November 2004) Size : 20-25 mm

Sagaminopteron psychedelicum P.Bidgrain


 

Florence Trentin

Reunion, Etang Salé lagoon (01 January 2005)

Size :15 to 20 mm

Specimen laying its eggs, during the day, under dead coral.

In this photo you can observe a filament with little white eggs...

 

Sagaminopteron psychedelicum F.Trentin
Sagaminopteron psychedelicum F.Trentin

Reunion, Etang Salé lagoon (01 January 2005)

Size : 20 to 25 mm

This specimen crawling on the substrate


Sagaminopteron psychedelicum E.Eby

Emmanuel Eby

Reunion, Saint Leu, a specimen found during a dive, size 15 mm, 16 October 2004


Jérôme Clotagatide

Reunion, L'abri côtier (Bassin pirogue), Etang-Salé, less 1 m, 29 September 2009, size : 13 mm

Wingy expansions forming three wide folds when resting are well developed in this specimen.

 


Christophe Cadet

Reunion, Etang Salé lagoon, less 1 m, 24 January 2011, size : 13 mm

The internal side of the parapodia (a) with large black marking...


 More photos from Indian Ocean

See more about : Sagaminopteron psychedelicum variability in Southwest Indian ocean
   Reunion, Sagaminopteron psychedelicum, at Etang salé, by Bruno Manciet
   Reunion, Sagaminopteron psychedelicum, at Saint Leu, by Delphine Dupin
   Reunion, anterior side of S. Psychedelicum, at Saint Pierre, by Olivier Aubrespine 
   Mayotte, classical Sagaminopteron psychedelicum, at Sakouli, by Matthias Deuss
   Reunion, cephalic shield of Sagaminopteron psychedelicum, at Etang salé, by Philibert Bidgrain
   Reunion, Sagaminopteron psychedelicum with color marks on the gills, at Etang salé, by Philibert Bidgrain
   Reunion, posterior view of Sagaminopteron psychedelicum, at Etang salé, by Philibert Bidgrain