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It is Aegires sp. 2 in IPN:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs. Sea Challengers Natural History Books.
Gig Harbor, Washington. 426pp. at page 144
This species was posted on 3 April 2011at these websites as Aegires sp. C Genus: Gosse, 1877,
on 16 July 2011 changed into Aegires sp. 03 Genus: Lovén, 1844.
For some genera, such as Trinchesia was the alphabet almost through. I had to change the distinguishing alphabetic character into a number. I hade chosen 2-digit numbers, even though '01' looks a little bit stupid, and now is only the genus italic written.
How to cite:
Köhler, E. (2017), published 25 January 2017, Aegires sp. 03 Genus: Lovén, 1844
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Euctenidiacea/Aegires_sp_03.htm