Hopkins' Rose
Okenia rosacea (MacFarland, 1905)
Description 2
Ground color rose-pink, dorsal processes same color, or occasionally a lighter shade of same color. Dorsum densely covered with numerous very long, gently tapered, processes. Rhinophores with 18-24 lamellae; rose-pink on shaft, and somewhat darker pink on clavus. Branchial plumes 7-14, unipinnate, dark rose-pink. Labial tentacles form oral veil.
Size 2
Typically 20mm in length, but may reach at least 30mm.
Geographic Range 2
Coos Bay, OR, to Isla Cedros, Baja California, Mexico.
Notes 2
Preys on the pink bryozoan Eurystomella bilabiata, from which it obtains the pink pigment (hopkinsiaxanthin).
References 2
GODDARD, J. H. R., N.y TRENEMAN, W. E. PENCE, D. E. MASON, P. M. DOBRY, B. GREEN, & C. HOOVER. 2016. Nudibranch range shifts associated with the 2014 warm anomaly in the northeast Pacific. Bulletin of the Southern California Academy of Sciences 115(1):15-40. PDF
GOSLINER, T. M. 2004. Phylogenetic systematics of Okenia, Sakishimaia, Hopkinsiella and Hopkinsia (Nudibranchia: Goniodorididae) with descriptions of new species from the Tropical Indo-Pacific. Proceedings of the California Academy of Sciences, series 4, 55(5):125-161, 29 figs. PDF
MACFARLAND, F. M. 1966. Studies of opisthobranchiate mollusks of the Pacific coast of North America. Memoirs of the California Academy of Sciences 6:1-546, pls. 1-72. PDF
McDONALD, G. R. 1983. A review of the nudibranchs of the California coast. Malacologia 24(1-2):114-276. PDF
SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2018. A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring and research programs in the southern California bight, edition 12, 1 July 2018, xviii + 167 pp. PDF
Synonyms 2
Hopkinsia rosacea.
Additional Info 2
Sources and Credits
- (c) Gary McDonald, all rights reserved, uploaded by Gary McDonald
- (c) Gary McDonald, some rights reserved (CC BY-SA)
More Info
iNat Map
| Body | doridiform |
|---|---|
| Classification | Doridina |
| Rhinophores | perfoliate |
| Labial tentacles | oral veil |
| Dorsum | covered with long processes |
