Roboastra tentaculata (Pola, Cervera & Gosliner 2005) [Tambja]

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Roboastra tentaculata is charaterized by broad orange bands on its bluish-green body and by the distinctive "V" or "U" shaped anterior margin of the notum. The edge of the orange bands appears to be outlined by a thin dark line. The rhinophores and the gills are of the same colour as the body. It has well developed, grooved, dorsolateral oral tentacles.
Roboastra tentaculata was originally posted at these websites as Roboastra luteolineata (Baba, 1936) [Nembrotha] because I thought it might be a juvenile or a colour morph of it. It was originally placed in the genus Tambja, and transferred to Roboastra by Pola et al. 2008 in
Pola, M., Cervera, J.L. and Gosliner, T.M. 2008. Description of the first Roboastra species (Nudibranchia, Polyceridae, Nembrothinae) from the western Atlantic. Bulletin of Marine Science, 83: 391-399
More informations on Roboastra tentaculata as Tambja tentaculata are at Bill Rudman's Sea-Slug Forum!