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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."
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs.
Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp.
More information on Doris pecten as Doriopsis pecten are on Bill Rudman's Sea-Slug Forum!
How to cite:
Köhler, E. (2017), published 17 April 2017, Doris pecten Collingwood, 1881
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Doris_pecten.htm