This species has been observed on Réunion and Mauritius Islands
Superfamily : Philinoidea
Tropical Indo-West Pacific
Maximal size : 30 mm
Abundance : Seldom if ever on the rocky coast and the lagoon
Species characteristics :
This species can be recognized by its brown to dark brown coloration with small opaque white spots and transverse bars of opaque white with smaller areas of yellow-orange pigment.
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Photo Philibert Bidgrain
Reunion, Etang salé, on the rocky coast, less 1 m , 11 November 2004
See more about : Sightening and mating periods
Identification confirmed by Bill Rudman
Synonymous : (according Worms)
- Aglaja orientalis Baba, 1949
- Philinopsis orientalis (Baba, 1949)
Bibliographic data :
The external body form is elongated with moderate caudal lobes
Living animal with bilobed outer margin of the head shield, truncated posteriorly
Internal shell longer than broad, completely calcified
They have huge mucus glands around the head which produce mucus secreted when they crawling on the substrate or burrowing through sand or mud.
Bill Rudman Seaslug site : Sea Slug Forum : Aglaja orientalis
Nudipixel Aglaja orientalis
Baba, K. (1949) Opisthobranchia of Sagami Bay . Iwanami Shoten, Tokyo. 211pp + pls.
Camacho-García Y.E., Ornelas-Gatdula E., Gosliner T.M. & Valdés A. (2013) Phylogeny of the family Aglajidae (Pilsbry, 1895) (Heterobranchia: Cephalaspidea) inferred from mtDNA and nDNA. Molecular Phylogenetics and Evolution 71: 113–126.
Gosliner, T. M. (1980) Systematics and phylogeny of the Aglajidae (Opisthobranchia: Mollusca). Zoological Journal of the Linnean Society, 68: 325-360.
Zamora-Silva A. & Malaquias M.A.E. (2017). Molecular phylogeny of the Aglajidae head-shield sea slugs (Heterobranchia: Cephalaspidea): new evolutionary lineages revealed and proposal of a new classification. Zoological Journal of the Linnean Society.
Other photos of Spinoaglala orientalis :
Reunion, La Saline lagoon, less 1 m, 2 April 2010, size : 20-22 mm
This species can be recognized by its brown to dark brown coloration with small opaque white spots (a) and transverse bars of opaque white (b) with smaller areas of yellow-orange pigment. (c)
Reunion, L'abri côtier (Bassin pirogue), Etang-Salé, less 1m, 29 September 2009, size : 10 mm
They have huge mucus glands around the head which produce mucus (a) secreted when they crawling on the substrate or burrowing through sand or mud.
Reunion, Etang salé, on the rocky coast, less 1 m , 25 December 2008, size : 22 mm
More photos from Indian Ocean
Mauritius, Spinoaglala orientalis, at Mahebourg, by Yann von Arnim