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In form one, the animal is translucent with small white dots all over. This form is burrowing into the Palythoa colony, The form two is brown-speckled and has also small white dots all over, and so resembles the external colour of the brown Palythoa that it is almost invisible. The brown colouration is from clusters of zooxanthellae in small branches of the digestive gland ramifying to all parts of the body.
Both forms are what Bill Rudman calls "Solar-powered Sea Slugs".
Carmona et al. (2013) synonymized Aeolidiopsis Pruvot-Fol, 1956 with Baeolidia Bergh, 1888.
Pruvot-Fol A. (1956). Un aeolidien nouveau des mers tropicales: Aeolidiopsis ransoni n.g., n.sp.
Bulletin du Muséum National d'Histoire Naturelle. ser. 2, 28: 228-231.,
available online at https://www.biodiversitylibrary.org/page/54828766
Carmona L., Pola M., Gosliner T.M. & Cervera J.L. 2013. A tale that morphology fails to tell: A molecular phylogeny of Aeolidiidae (Aeolidida, Nudibranchia, Gastropoda).
PLoS ONE 8(5): e63000. doi:10.1371/journal.pone.0063000,
available online at: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0063000
More information on Baeolidia ransoni as Aeolidiopsis ransoni are at Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2020), published 6 April 2020, Baeolidia ransoni (Pruvot-Fol, 1956)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Cladobranchia/Baeolidia_ransoni.htm