This species has been observed on Reunion Island
Order : Nudibranchia
Suborder : Dexiarchia
Superfamily : Aeolidioidea
Distribution : Indo pacific
Maximal size : 20 mm
Species characteristics :
Variable from white to brown with numerous opaque white dots
Cerata dorsoventrally flattened and leaf like arranged along to entire length of the body. The cerata in front of the pericardium form a single horizontal row on each side, while the postpericardial cerata are arranged in closely packed, sloping rows of two to four cerata
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Photo Sébastien Vasquez
Reunion, less 1 m, 11 January 2016
Synonymous (according worms) :
ransoni Pruvot-Fol, 1956
Bibliographic data :
The cerata are flattened leaf-like structures and in smaller specimens (7 mm long) they are arranged in a single row along the edge of the dorsum, while in larger specimens (15 mm long) the cerata are more numerous. The cerata in front of the pericardium form a single horizontal row on each side, while the postpericardial cerata are arranged in closely packed, sloping rows of two to four cerata
There are two distinct colour forms.
- In one, the animal is translucent with small white patches all over. There is a distinct white patch between the rhinophores, and another midway along the posterior edge of each ceras. There is often a white band on the rhinophores just below the tip. The viscera show through as creamy white. There are a few golden brown specks scattered over the body, foot and cerata.
- In the other colour form the animal appears speckled brown on the body, cerata, oral tentacles, rhinophores and foot. The brown colouration is from clusters of zooxanthellae in small branches of the digestive gland ramifying to all parts of the body.
Feeds on the zoanthid Palythoa sp by scraping away tissue and leaving a depression that the slug occupies making it even cryptic on its prey
Bill Rudman Seaslug site : Sea Slug Forum : Aeolidiopsis ransoni
Hawai Seaslug Baeolidia ransoni
Rudman, W.B. (1982) The taxonomy and biology of further aeolidacean and arminacean nudibranch molluscs with symbiotic zooxanthellae. Zoological Journal of the Linnean Society, 74 : 147-196.
Pruvot-Fol A. 1956. Un aeolidien nouveau des mers tropicales: Aeolidiopsis ransoni n.g., n.sp. Bulletin du Muséum National d'Histoire Naturelle , Paris, (2)28: 228-231
Other photos of Baeolidia ransoni :
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