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Pretty similar are
Mexichromis mariei which has an orange band or a series of orange patches at the edge of the mantle and flattened rounded tubercles, which are tipped in reddish-purple,
Mexichromis cf. mariei which differs by its few very small tubercles, which are tipped in white.
More information on Mexichromis multituberculata are on Bill Rudman's Sea-Slug Forum!