Red Sea Opisthobranchia 6: Phyllidiidae and their paradorid mimic: new species and new records (Heterobranchia, Nudibranchia, Doridina).

Nathalie Yonow

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


With the complexity of the family Phyllidiidae and the problems of identification in the Indo-West Pacific, the story of the Red Sea species continues to unfold. One new species and one new record are added to the Red Sea fauna, both belonging to the genus $\textit{Phyllidiella}$. $\textit{Phyllidiella amphitrite}$ sp. nov. is described from a single specimen from the northern Red Sea and clearly differs from all species of $\textit{Phyllidiella}$ in having pale yellow pigment on the tubercles. $\textit{Phyllidiella zeylanica}$ is newly recorded from the Red Sea with five specimen records and several photographed individuals; other than this, it has a western Indian Ocean distribution. $\textit{Phyllidia schupporum}$ was collected for the first time since its original description; because its distribution is now extended to the Persian Gulf, it is no longer considered endemic to the Red Sea. The distribution of the Red Sea endemic $\textit{Phyllidia dautzenbergi}$ is extended northwards to Hurghada, Egypt. A small specimen of the endemic $\textit{Phyllidiopsis sinaiensis}$ was found at 214-237 m depth just at the mouth of the Red Sea, which is a bathymetrical range extension from its previous shallow coral reef records. The identifications of other species are revisited. A new species of $\textit{Paradoris}$ is described as $\textit{Paradoris hypocrita}$ sp. nov., differing from the well-known but localised West Pacific $\textit{P. liturata}$ which also resembles a phyllidiid. This new species was recorded many years ago by published photographs, and it is relatively common in the Red Sea, evidenced by several specimens and additional photographs. It is described herein, and is considered a Red Sea endemic, differing from both the unnamed Indian Ocean species and the named Pacific species.
Original languageEnglish (US)
Pages (from-to)1-34
Number of pages34
Issue number1006
StatePublished - Jan 14 2021
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-09-09
Acknowledgements: I would like to thank the scientists who have generously provided their specimens and photographs over the years. Ernesto Mollo/Ángel Valdés (Italian National Research Council, Rome/Cal Poly Pomona, California), Thomas Paulus (GFGmbH, Mainz, Germany), and Bernard Picton (Belfast Museum) sent me their Red Sea collections a very long time ago – thank you so much, and apologies for the delay. Bert Hoeksema (Naturalis, Leiden) kindly sent me all the phyllidiids collected during the Farasan Banks Cruise in May 2017 (under leadership of Prof. Michael L. Berumen, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia) for examination and identification; he has also been a very supportive subject editor, for which I am grateful. I thank A. Martynov (ZMMU) for the radular SEM micrographs; the specimens and stubs are still with him until restrictions are lifted.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics


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