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Flabellina rubrolineata (O’Donoghue, 1929) [Coryphellina]

Click the thumbnail photos to enhance!

There are many colour variations within Flabellina rubrolineata. It usually has red longitudinal lines on its body, one down the centre of its back and one down each side of the body just below the cerata, but these lines can sometimes be broken, or be totally absent. The rhinophores are papillate, often with a reddish apex.
I have posted more pictures of Flabellina rubrolineata than usual, to show some of its colour variations.
It is part of the 'Flabellina rubrolineata look-alike' complex:
Pretty similar are:
Flabellina cf. rubrolineata which has smooth rhinophores, and
Unidentia angelvaldesi which has a broad opaque white band at the smooth rhinophores,and
Flabellina sp. 05 which differs by smooth rhinophores, which are basally bluish with a white outer half, the oral tentacles are of the same colour.
Unidentia cf. angelvaldesi which lacks the purple longitudinal lines.
More information on Flabellina rubrolineata are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2016), published 3 January 2016, Flabellina rubrolineata (O’Donoghue, 1929)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Dexiarchia/Flabellina_rubrolineata.htm