Graceful Aeolid

Abronica abronia (MacFarland, 1966)

Description 2

Ground color translucent greyish-white, dorsum encrusted with a few opaque white to pale yellow dots, a blotch of the same color occurs just posterior of rhinophores and a line of similar color occurs dorso-medially on the tail. Cerata bear about 3, sometimes incomplete, narrow bands of encrusting white to pale yellow which form boundaries between colored segments of the cores. Cores pale yellow in distal third, medial third olive green to brown, and proximal third maroon to carmine. Oral tentacles bear a band of purple midway along their length, with a pale yellow ring proximal of this and also encrusting distal one thirds of tentacles, frequently with diffuse purple proximally, Rhinophores smooth, colored as oral tentacles. Anterior foot corners rounded.

Size 2

Typically less than 10mm in length.

Geographic Range 2

Makaw Bay, WA, to Islas Coronados, Baja California, Mexico.

References 2

ANONYMOUS. 2012. April nudibranch survey. Between the Tides, Friends of Fitzgerald Marine Reserve, June 2012:2. PDF

ANONYMOUS. 2013d. Nudibranch survey continues. Between the Tides, Friends of Fitzgerald Marine Reserve, September 2013:9. PDF

AUSTIN, W. C. 1985. An annotated checklist of the marine invertebrates in the cold temperate northeast Pacific. 3 vols., xiv + 682 pp. Khoyatan Marine Laboratory.

BEHRENS, D. W. 1980. Pacific coast nudibranchs, a guide to the opisthobranchs of the northeastern Pacific

BEHRENS, D. W. 1984. Notes on the tergipedid nudibranchs of the northeastern Pacific, with a description of a new species. The Veliger 27(1):65-71. PDF

BEHRENS, D. W. 1991. Pacific coast nudibranchs: a guide to the opisthobranchs, Alaska to Baja California, vi + 107 pp., 217 photos. Second Edition. Sea Challengers, Monterey, California.

BEHRENS, D. W. 1992. Pacific coast nudibranchs, supplement I radula, pp. 1-11. Sea Challengers, Monterey, California.

BEHRENS, D. W., & A. HERMOSILLO. 2005. Eastern Pacific nudibranchs, a guide to the opisthobranchs from Alaska to Central America. vi + 137 pp., 314 photos. Sea Challengers, Monterey, California.

BERTSCH, H. 2010. Biogeography of Northeast Pacific opisthobranchs: comparative faunal province studies between Point Conception, California, USA, and Punta Aguja, Piura, Perú, pp. 219-259. In: Luis José Rangel Ruiz, Jaquelina Gamboa Aguilar, Stefan L. Arriaga Weiss, & Wilfrido M. Contreras Sánchez (Eds.). Perspectivas en Malacología Mexicana, 259 pp. División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco. PDF

BERTSCH, H., T. GOSLINER, R. WHARTON, & G. WILLIAMS. 1972. Natural history and occurrence of opisthobranch gastropods from the open coast of San Mateo county, California. The Veliger 14(3):302-314. PDF

CELLA, K., L. CARMONA, I. EKIMOVA, A. CHICHVARKHIN, D. SCHEPETOV, & T. M. GOSLINER. 2016. A radical solution: the phylogeny of the nudibranch family Fionidae. PLoS ONE 11(12):e0167800. PDF

FARMER, W. M. 1980. Sea-slug gastropods, 177 pp. W. M. Farmer Enterprises, Tempe, Arizona.

GODDARD, J. H. R. 1984. The opisthobranchs of Cape Arago, Oregon, with notes on their biology and a summary of benthic opisthobranchs known from Oregon. The Veliger 27(2):143-163. PDF

GODDARD, J. H. R. 1987. Observations on the opisthobranch mollusks of Punta Gorda, California, with notes on the distribution and biology of Crimora coneja. The Veliger 29(3):267-273. PDF

GODDARD, J. H. R. 1987a. Cape Arago opisthobranchs. Shells & Sea Life 19(7):5. PDF

GODDARD, J. H. R. 1990. Additional opisthobranch mollusks from Oregon, with a review of deep-water records and observations on the fauna of the south coast. The Veliger 33(3):230-237. PDF

GODDARD, J. H. R. 1991. Unusually large polar bodies in an aeolid nudibranch: a novel mechanism for producing extra-embryonic yolk reserves. Journal of Molluscan Studies 57(4, supplement):143-152. PDF

GODDARD, J. H. R. 1992. Patterns of development in nudibranch mollusks from the northeast Pacific Ocean, with regional comparisons, xiv + 237 pp. Ph.D. thesis, University of Oregon. PDF

GODDARD, J. H. R. 1998. A summary of the prey of nudibranch molluscs from Cape Arago, Oregon. Opisthobranch Newsletter 24(2):11-14. PDF

GODDARD, J. H. R. 2001a. Mollusca: Gastropoda, pp. 86-128. In: Alan L. Shanks (Ed.). An identification guide to the larval marine invertebrates of the Pacific northwest. Oregon State University Press, 314 pp.

GODDARD, J. H. R. 2004. Developmental mode in benthic opisthobranch molluscs from the northeast Pacific Ocean: feeding in a sea of plenty. Canadian Journal of Zoology 82(12):1954-1968. PDF

GODDARD, J. H. R., T. M. GOSLINER, & J. S. PEARSE. 2011a. Impacts associated with the recent range shift of the aeolid nudibranch Phidiana hiltoni (Mollusca, Opisthobranchia) in California. Marine Biology 158(5):1095-1109. PDF

GODDARD, J. H. R., T. A. WAYNE, & K. R. WAYNE. 1997. Opisthobranch mollusks and the pulmonate limpet Trimusculus reticulatus (Sowerby, 1835) from the outer Washington coast. The Veliger 40(4):292-297. PDF

GOSLINER, T. M., & G. C. WILLIAMS. 1970. The opisthobranch mollusks of Marin county, California. The Veliger 13(2):175-180. PDF

GOTO, Y, & G T. POPPE. 1996. A listing of living Mollusca, part II, vol. 2, pp. 525-1031. Ancona: L'informatore piceno.. [species are also listed in alphabetical order by specific epithet in part I, vols. 1 & 2].

GRUENHAGEN, H. 2005. Just “branking”. Bottom Bunch Dive Club (National City, California) 1(4):6. PDF

HELLER, J. 1990. Longevity in molluscs. Malacologia 31(2):259-295. PDF

JAECKLE, W. B. 1983a. Range extensions for two California cuthonids (Gastropoda: Nudibranchia) from Santa Catalina Island. Opisthobranch Newsletter 15(11-12):53. PDF

JAECKLE, W. B. 1984. The opisthobranch mollusks of Humboldt county, California. The Veliger 26(3):207-213. PDF

KOZLOFF, E. N., & L. H. PRICE 1987. Marine invertebrates of the Pacific northwest, vi + 511 pp. University of Washington Press.

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. 1975a. Key D: Sacoglossa and Nudibranchia, pp. 522-542, pls. 121-123. In: Ralph Ingram Smith & James T. Carlton (Eds.). Light's manual, intertidal invertebrates of the central California coast, xviii + 716 pp., 156 pls. University of California Press.

MCDONALD, G. R. 1977. A review of the nudibranchs of the California coast, ix + 373 pp. M.A. thesis, California State University, Hayward. PDF

MCDONALD, G. R. 1983. A review of the nudibranchs of the California coast. Malacologia 24(1-2):114-276. PDF

MCDONALD, G. R., & J. W. NYBAKKEN. 1980. Guide to the nudibranchs of California, including most species found from Alaska to Oregon, 72 pp., 112 photos. American Malacologists.

NYBAKKEN, J. W. 1974. A phenology of the smaller Dendronotacean, Arminacean and Aeolidacean nudibranchs at Asilomar State Beach over a twenty-seven month period. The Veliger 16(4):370-373. PDF

ROBILLIARD, G. A. 1971. Range extensions of some northeast Pacific nudibranchs (Mollusca: Gastropoda: Opisthobranchia) to Washington and British Columbia, with notes on their biology. The Veliger 14(2):162-165. PDF

ROBILLIARD, G. A., & E. N. KOZLOFF. 1987. Subclass Opisthobranchia, pp. 232-258. In: Eugene N. Kozloff (Ed.). Marine invertebrates of the Pacific northwest, vi + 511 pp. University of Washington Press.

ROLLER, R. A. 1969a. Nomenclatural changes for the new species assigned to Cratena by MacFarland, 1966. The Veliger 11(4):421-423. PDF

ROLLER, R. A. 1970. A list of recommended nomenclatural changes for MacFarland's “Studies of opisthobranchiate mollusks of the Pacific coast of North America”. The Veliger 12(3):371-374. PDF

ROLLER, R. A., & S. J. LONG. 1969. An annotated list of opisthobranchs from San Luis Obispo county, California. The Veliger 11(4):424-430. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2008. A taxonomic listing of macro- and megainvertebrates from infaunal & epibenthic monitoring programs in the southern California bight, edition 5, 21 July 2008, 210 pp. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2011. A taxonomic listing of macro- and megainvertebrates from infaunal & epibenthic monitoring programs in the southern California bight, edition 6, 1 July 2011, 211 pp. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2012. A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring programs in the southern California bight, edition 7, 1 July 2012, ii + 137 pp. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2013. A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring and research programs in the southern California bight, edition 8, 1 July 2013, 143 pp. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2014. . A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring and research programs in the southern California bight, edition 9, 1 July 2014, i + 166 pp. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2015. A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring and research programs in the southern California bight, edition 10, 10 July 2015, i + 167 pp. PDF

SOUTHERN CALIFORNIA ASSOCIATION OF MARINE INVERTEBRATE TAXONOMISTS. 2016. A taxonomic listing of benthic macro- and megainvertebrates from infaunal & epibenthic monitoring and research programs in the southern California bight, edition 11, 1 July 2016, i + 171 pp. PDF

SPHON, G. G. 1972. Some opisthobranchs (Mollusca: Gastropoda) from Oregon. The Veliger 15(2):153-157. PDF

SPHON, G. G. 1972a. An annotated checklist of the nudibranchs and their allies from the west coast of North America. Opisthobranch Newsletter 4(10-11):53-79. PDF

STATE WATER RESOURCES CONTROL BOARD. 1979. California marine waters areas of special biological significance. Reconnaissance survey report. Duxbury Reef Reserve and extension Marin County. California State Water Resources Control Board, Division of Planning & Research, Surveillance & Monitoring Section. May 1979. Water Quality Monitoring Report No. 79-14, iii + 48 pp. PDF

STATE WATER RESOURCES CONTROL BOARD. 1979b. California marine waters areas of special biological significance. Reconnaissance survey report. Carmel Bay, Monterey County. State Water Resources Control Board, Division of Planning & Research, Surveillance & Monitoring Section. April 1979. Water Quality Monitoring Report No. 79-10, iii + 159 pp. PDF

TURNER, T. 1978. Adaptive significance of foot forms and types of locomotion in opisthobranchs, x + 66 pp. M.A. thesis, California State University, Hayward. PDF

Synonyms 2

Cuthona abronia, Trinchesia abronia

Additional Info 2

WoRMS

Sources and Credits

  1. (c) Gary McDonald, all rights reserved, uploaded by Gary McDonald
  2. (c) Gary McDonald, some rights reserved (CC BY-SA)

More Info

iNat Map

Body aeolidiform
Classification Aeolidina
Cerata unbranched
Rhinophores smooth