Identification Key to the Phyllidiids of the Indo-Pacific Ocean
According to morphological and anatomical features
Thanks to Alexander Fahrner and Lothar A. Beck

15. Tubercles single, forming a sinuous ridge medially. Anus occurring on a tubercle. Phyllidiopsis sinaiensis (Yonow, 1988)

- Tubercles compound or multi-compound, never forming a ridge. Anus occurring on a tubercle - 16