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Atagema ornata (Ehrenberg, 1831) [Doris]

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Atagema ornata is usually dark brown with a lighter coloured brownish white line down the dorsal midline on a raised tuberculate crest. Other compound tubercles are scattered over the rest of the mantle. The tip of the tubercles have pointed spicules giving the skin a rough texture. There are usually microscopic white spots scattered over the mantle, gills and rhinophores. Juveniles are often much paler.
This species is labelled in almost all publications Trippa intecta. Concerning the change of Trippa to Atagema have a look at
Valdés, A. & Gosliner, T. M. (2001) Systematics and phylogeny of the caryophyllidia-bearing dorids (Mollusca, Nudibranchia), with the description of a new genus and four new species from Indo-Pacific deep waters. 
Zoological Journal of the Linnean Society, 133: 103-198.
Comment from Dr. Richard C. Willan at NUDIPIXEL:
"Atagema ornata and Atagema intecta both relate to the same species and we must use Atagema ornata (instead of Atagema intecta - which is more common in the literature) because it is the older name."
So I changed Atagema intecta (Kelaart, 1859) [Doris] into Atagema ornata (Ehrenberg, 1831) [Doris]
More informations on Atagema ornata are at Bill Rudman's Sea-Slug Forum!