Phyllidiella backeljaui is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.WoRMS (2015). Phyllidiella backeljaui Dominguez, Quintas & Troncoso, 2007 In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-11-05.
Distribution This species was described from Laing Island, Papua New Guinea.
Description This nudibranch has a pale pink dorsum with white-capped compound tubercles in the middle part, reducing in size to single tubercles at the margin. There are two narrow black lines which run in a wavy pattern between the tubercle groups, joining at the tail. Connecting black lines run across the body and down the sides and there is a narrow black margin to the mantle. The rhinophores are black.
Diet This species feeds on sponges.
References