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IPN places this species at page 157 in the genus Doris.
Let me quote from the identification of Doris granulosa: "Species with a pectinate gill where often placed in a separate genus, Doriopsis, but are now considered to be a subgroup within Doris."
This species was posted on 21 April 2011 at these websites as Doris pecten Collingwood, 1881.
Yonow (2017) removed Doriopsis from synonymy with Doris, let me quote: "Small dorids with large internal calcareous spicules, a rearward directed mantle flap covering the gills, and fan-like backwards-facing gills were always placed in the genus Doriopsis Pease, 1860 (= Ctenodoris Eliot, 1907) until Valdés (2002) synonymised them under the broadly encompassing genus Doris Linnaeus, 1758. Modern phylogenetic systematics is dismembering allencompassing genera into smaller monophyletic units and, on the basis of the apomorphies mentioned above, Doriopsis is assumed to be monophyletic, consisting of at least 4 species. Consequently, it is removed from synonymy with Doris in this work."
I changed it on 24 March 2020 into Doriopsis pecten (Collingwood, 1881) [Doris].
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs.
Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp.
Yonow N. (2017). Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 16. The Nudibranchia - Dendronotina, Arminina, Aeolidina, and Doridina (Mollusca: Gastropoda: Heterobranchia).
Archiv für Molluskenkunde. 146(1): 135-172.
More information on Doris pecten as Doriopsis pecten are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2020), published 2 May 2020, Doriopsis pecten (Collingwood, 1881)
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Doriopsis_pecten.htm