Dendrodorididae, O'Donoghue, 1924

Goddard, Jeffrey H. R., Treneman, Nancy, Prestholdt, Tara, Hoover, Craig, Green, Brenna, Pence, William E., Mason, Douglas E., Dobry, Phillip, Sones, Jacqueline L., Sanford, Eric, Agarwal, Robin, McDonald, Gary R., Johnson, Rebecca F. & Gosliner, Terrence M., 2018, Heterobranch Sea Slug Range Shifts in the Northeast Pacific Ocean associated with the 2015 - 16 El Niño, Proceedings of the California Academy of Sciences 65 (3), pp. 107-131 : 114-115

Dendrodorididae

Doriopsilla albopunctata (Cooper, 1863) . Whiskey Creek , Curry Co., Oregon, 1 specimen, low rocky intertidal, 29 May 2017 ( Fig. 2B ) (observed by NT) to San Diego, California and possibly Baja California ( Hoover et al. 2015) .

Previous northernmost locality: not clear, owing to inclusion of D. fulva as a junior synonym of D. albopunctata until publication of Hoover et al. (2015). The latter authors give Mendocino, California as the northern range limit of D. albopunctata .

Additional northern localities: Palmer’s Point, Patrick’s Point State Park, California, 2 specimens, low rocky intertidal, 7 June 2016 (observed by JG). Glass Beach, Fort Bragg , California, 1 specimen, low rocky intertidal, 23 June 2017 (observed by JG; for image see <https://www. inaturalist.org/observations/6872674>) .

Doriopsilla fulva ( MacFarland, 1905) . Netarts Bay , Oregon, at least 14 total specimens, rock rubble, 4–8 m depth, April, June, July, August 2016, June 2017 ( Fig 2C ) (Todd Cliff, personal communications to JG, 18 December 2016 and 25 June 2017) to Laguna Guerrero Negro, Baja California, Mexico (Bertsch and Aguilar Rosas 2016) .

Previous northernmost locality: Whiskey Creek , Curry Co., Oregon ( Goddard et al. 2016) .

Additional northern localities: Middle Cove, Cape Arago, Oregon, low rocky intertidal, 3 specimens ( CASIZ 216866 , 209506 , 209501 ), 5 June 2016 (observed by JG and NT; for image see <http://www.inaturalist.org/observations/3528069>); 1 specimen, 27 May 2017 (observed by NT). Crook Point , Curry Co., Oregon, 2 specimens, low rocky intertidal, 7 February 2016 (observed by NT) .

Remarks: Goddard et al. (2016) reported finding a single juvenile D. fulva at Whiskey Creek, Oregon in June 2015, the first specimen of this species reported from north of California. One year later (6 June 2016) at the same site JG and NT counted 43 specimens of D. fulva , and a year after that (29 May 2017) NT found 11 specimens. For the southern Oregon coast as a whole, only two specimens of D. fulva were found in 2015 ( Goddard et al. 2016). This was based on 37 trips to 20 sites, largely by NT. The following year NT counted a total of 204 individuals in 19 visits to 13 of those same sites, finding D. fulva at seven of them. Through the first half of 2017 NT had counted 24 total individuals of D. fulva at four out of 10 sites visited in southern Oregon. Todd Cliff and Andy Lamb found at least 5 specimens in Netarts Bay on 5 June 2017 (Todd Cliff, personal communication to JG, 25 June 2017).

Doriopsilla gemela Gosliner, Schaefer and Millen, 1999 . Elkhorn Slough, Moss Landing, California, 1 specimen, 4 m depth, just inside entrance to slough, 5 July 2016 ( Bentall 2016) to Bahía Tortugas, Baja California Sur (Bertsch and Aguilar Rosas (2016).

Previous northernmost locality: Monterey, California ( Hoover et al. 2015; Goddard et al. 2016; and see <https://www.inaturalist.org/observations/5220737>).

Additional northern localities: T Pier , Morro Bay, California, 19 specimens with egg masses on shell rubble, 3–4 m depth, 25 May 2016 (observed by CH) .

Figures

FIGURE 2. Nudibranch sea slugs found at new northern localities in the Northeastern Pacific Ocean, 2015–2017. A Doris cf. pickensi, Morro Bay, California, 25 May 2016. Image by CH. B Doriopsilla albopunctata, Whiskey Creek, Curry Co., Oregon, 19 May 2017. Image by NT. C Doriopsilla fulva, Netarts Bay, Oregon, 16 July 2016. Image by Todd Cliff. D Hermissenda opalescens, Box Canyon, Neah Bay, Washington, 20 August 2015. Image by Doug Miller.