Thysanozoon sp. 05  Genus: Grube, 1840

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I had been scanning through all websites on MARINE FLATWORMS, but I did not find a picture of a similar species, maybe there are some at NUDIPIXEL within the -as of 15 October 2012- 631 Unidentified polyclad flatworm pictures.
I place it tentatively in the genus Thysanozoon  Grube, 1840, it might be as well a species of Acanthozoon  Collingwood, 1876, which possess only a single male copulative organ contrary to Thysanozoon.
I think it might be a variant of Thysanozoon sp. 04 which lacks the rounded tubercles, the general appearance is very similar, for now I keep them seperate!