Acanthodoris pilosa (Abildgaard in Müller, 1789)
Acanthodoris pilosa by Klas MalmbergSynonyms
- Acanthodoris citrina Verrill, 1879
- Acanthodoris ornata Verrill, 1879
- Acanthodoris pallida Bergh, 1905
- Acanthodoris pilosa var. albescens Bergh, 1880
- Acanthodoris pilosa var. pallida Bergh, 1905
- Acanthodoris pilosa var. purpurea Bergh, 1880
- Acanthodoris pilosa var. zealandiae Bergh, 1905
- Acanthodoris subquadrata (Alder & Hancock, 1845)
- Doris bifida Verrill, 1870
- Doris flemingi Forbes, 1838
- Doris flemingii Forbes, 1838
- Doris laevis Gray M.E., 1850
- Doris nigricans Fleming, 1820
- Doris pilosa Abildgaard in Müller, 1789 (original)
- Doris quadrangulata Jeffreys, 1869
- Doris rocinela Leach, 1852
- Doris similis Alder & Hancock, 1842
- Doris stellata Gmelin, 1791
- Doris sublaevis Thompson, 1840
- Doris subquadrata Alder & Hancock, 1845
Body usually measures about 40mm long, with a maximum recorded length of 55mm. The mantle completely covers the body, shaped like a dome. Body color is variable, and could be white, pale grey, yellow, brown or black. The light colored specimens, specially the juveniles, may have darker spots or freckles, and their internal organs can be seen by transparency. The mantle is heavily spiculated with long, thin, radially arranged spicules that make it soft to touch. It is also covered of soft, tall, conical tubercles that give it the characteristic pilose look, but these tubercles could be contracted making identification more difficult. The foot is translucent white, occasionally with dark spots on the sole, the upper side is freckled as the mantle. The foot is both anteriorly and posteriorly rounded, internal organs can be seen by transparency in the centre, and it protrudes beyond the mantle when the animal moves. The head has narrow oral veil that forms two blunt, rounded oral tentacles at the sides. It has long rhinophores, usually bent back and outwards, with a smooth stem and 10-24 lamellae (numbers increase with specimen size) in its distal portion, and a nipple on the tip. They emerge from low pallial sheaths with crenulated rims and share the same colour of the mantle, but the lamellae that could be frequently yellowish and occasionally bright orange. There are nine relatively big tripinnate gills of the same colour of the mantle, often with white axis and some white on the leaves, that are located around the anus, in the back of the dorsum.
It is found from the surface down to 170 m depth. It usually feeds on encrusting polyzoans of the genus Alcyonidium, also found on Flustrellidra hispida. It reaches maturity at 8mm long (Miller, 1958), and the spawn is a convoluted ribbon of white eggs of 64-76 microns in diameter, forming a two turns spiral, attached to the substrate by one edge. The gill leaves and could be retracted independently under the mantle if the animal is disturbed.
- Acanthodoris. From Greek “akantha”, thorn, spine + “Doris”, a sea nymph in Greek mythology, wife of Nereus, nymph of the waters and mother of Nereids.
- Pilosa. From Latin “pilosus”, hairy, shaggy, covered with hair.
There are reports from the Arctic Ocean (Faeroes and Iceland) down to Morocco, it is common around the British Islands and in both sides of the North Sea. It is present in both Northern American shores, from Greenland to Virginia in the Atlantic, and from Alaska to Vancouver in the Pacific. Acanthodoris pilosa is considered “dubia” in the Mediterranean. Considered common in Palermo, Italy by Philippi (1836) (as Doris stellata Gmelin in Linnaeus, 1791 fide Thompson and Brown, 1984), in fact this species has only been reported in the Mediterranean by Forbes (1844) for the Aegean Sea (Cattaneo-Vietti & Chemello, 1987).
MonthThis chart displays the monthly observation probability for Acanthodoris pilosa based on our own records.
|Western Mediterranean: ||☆☆☆☆☆|
|Eastern Mediterranean: ||★☆☆☆☆|
|Atlantic Ocean: ||★★★☆☆|
Bibliography based on the works by Steve Long, 2006. Bibliography of Opisthobranchia 1554-2000 and Gary McDonald, 2009. Bibliographia Nudibranchia, with later updates from other resources.
Abbott, R. T. 1954. American seashells. With illus. by Frederick M. Bayer. Van Nostrand.
Abbott, R. T. 1974. American seashells. The marine mollusca of the Atlantic and Pacific coast of North America. Van Nostrand, New York. 663 pp., 24 pls. [October 1974].
Abildgaard, P. C. 1789. Zoologia Danica, etc, ed 3, 3:1-71, pls 81-120.
Abraham, P. S. 1877. Revision of the anthobranchiate nudibranchiate Mollusca with descriptions or notices of forty-one hitherto undescribed species. Proceedings of the Zoological Society of London 1877: 196-269 [agosto].
Abric, P. 1904. Sur un nouveau doridien de Wimereux. Comptes Rend. Hebdomadaires Seances Mem Soc. Biol. Filiales 57:232-234.
Ackermann, C. n.d. Beiträge zur Physischen Geographie der Ostsee, ix + 399 pp., 5 pls. Otto Meissner, Hamburg.
Adams, A. A., and H. Adams. 1853. The genera of recent Mollusca, arranged according to their organization. London (van Voorst): pp.1-256, pls 1-32, 1853; 257-484, pls 33-60, 1854 (1); 1-92, pls 61-72, 1854; 93-284, pls 73-96, 1855; 285-412, pls 97-112, 1856; 413-540, pls 113-128, 1857; 541-661, pls 129-138, 1858 (2). vol 2; pp 45-78 Oct.-Nov. 1854; pp 97-99 Jan 1855; p 632-635 Nov 1858; pls. 62-68, 137, fig. 14; pl 138, fig. 1.
Aerts, L. A. M. 1994. Seasonal distribution of nudibranchs in the southern delta area, S W. Netherlands. J. Molluscan Stud. 60(2):129-139.
Agersborg, H. P. v. 1921. Contributions to the knowledge of the nudibranchiate mollusk, Melibe leonina (Gould). Amer. Naturalist 55(638):222-253; 12 figs.
Alder, J. 1865. Report on the Mollusca, In: Reports of deep sea dredging on the coasts of Northumberland and Durham, 1862-4, Natural History Transactions Northumberland & Durham 1:5-11.
Alder, J. 1869. Account of the British Nudibranchiata. Jeffrey’s British Conchology 5:18-94.
Alder, J., and A. Hancock. 1864. Notice of a collection of nudibranchiate Mollusca made in India by Walter Elliot Esq. with descriptions of several new genera and species. Transactions of the Zoological Society of London 5 (3-4): 113-147.
Alder, J., and A. Hancock. 1851. A monograph of the British nudibranchiate Mollusca: with figures of all the species. Ray Society, London.
Alder, J., and A. Hancock. 1845. Report on the British nudibranchiate Mollusca. Report 14th Meeting of the British Association for the Advancement of Science; pp 24-29.
Alder, J., and A. Hancock. 1855. A monograph of the British nudibranchiate Mollusca: with figures of all the species. Ray Society, London.
Alder, J., and A. Hancock. 1854. A monograph of the British nudibranchiate Mollusca: with figures of all the species. Ray Society, London.
Allen, E. J. 1899. On the fauna and bottom-deposits near the thirty-fathom line from the Eddystone Grounds to Start Point. Journal of the Marine Biological Association of the United Kingdom 5(4):365.
Altena, C. O. v. R. 1937. Bijdrage tot de Kennis der Fossiele, Subfossiele en recente Mollusken, die op de Nederlansche Stranden Aanspoelen, en Hunner Verspreiding, xii + 184 pp, 12 pls. D. van Sijn & Zonen, Rotterdam.
Anderson, J. 1999
. Acanthodoris pilosa accessed through: Scottish Nudibranchs on 2014-12-21. (http://www.nudibranch.org/Scottish Nudibranchs/acanthodoris-pilosa.html
Ansted, D. T. 1862. The Channel Islands, xxviii + 604 pp. Wm H Allen Co.
Atkinson, E. G., and J. W. Wacasey. 1989. Benthic invertebrates collected from the western Canadian Arctic, 1951 to 1985. Canadian Data Report of Fisheries & Aquatic Sciences 745, iv + 142 pp.
Aurivillius, C. W. S. 1886. Hafsevertebrater fran nordligaste Tromso amt och Vestfinmarken. Bihang till Kongl. Svenska Vetenskaps-Akademiens Handlingar, Stockholm 11(4):1-56, pls. 1-2.
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.
Avila, C. 2006. Molluscan natural products as biological models: chemical ecology, histology, and laboratory culture, pp. 1-23. In: Guido Cimino & Margherita Gavagnin, (Eds.). Molluscs: from chemo-ecological study to biotechnological application. [Progress in Molecular & Subcellular Biology (Subseries: Marine Molecular Biotechnology) 43.]. Springer-Verlag, Berlin, Heidelberg & New York, i-xix, 1-387 pp.
Avila, C. 1995. Natural products of opisthobranch molluscs: a biological review. Oceanography and Mar Biol: an Annual Review 33: 487-559.
Baba, K. 1988. Japanese Opisthobranchia of difficult identification. Collecting & Breeding Saishu to Shiiku 50(4):164.
Baba, K. 1935. The fauna of Akkeshi Bay. I. Opisthobranchia. Journal of the Faculty of Science, Hokkaido Imperial University, series 6, Zoology 4(3):115-125, pls. 7-8.
Baba, K. 1937. Opisthobranchia of Japan (I). Journal of the Department of Agriculture, Kyushu Imperial University 5(4):195-236, pl 4.
Baba, K. 1957. A revised list of the species of Opisthobranchia from the northern part of Japan, with some additional descriptions. Journal of the Faculty of Science, Hokkaido University, Ser. 6, Zoology, 13(1-4): 8-14.
Baba, K. 1949. Opisthobranchia of Sagami Bay collected by His Majesty The Emperor of Japan. 194 pp, 50 pls. Iwanami Shoten, Tokyo.
Baba, K. 1937. Opisthobranchia of Japan (II). Journal of the Department of Agriculture, Kyushu Imperial University 5(7):289-344, pls. 1-2.
Baba, K. 1933. Preliminary note on the Nudibranchia collected in the vicinity of the Amakusa Marine Biological Laboratory. Annotationes Zoologicae Japonenses 14(1):165-179.
Balch, F. N. 1909. A spring collecting trip. Notes on New England nudibranchs II. Nautilus 23(3):33-38.
Balch, F. N. 1910. Rectification of the nomenclature of the Nudibranchiata in Lermond’s.
Ballesteros, M. 1980. Contribución al conocimientos de los Sacoglosos y Nudibranquios (Mollusca: Opisthobranchia). Estudio anatómico, sistemático y faunístico de las especies del mediterráneo español. Tesis Doctoral.
Ballesteros, M., E. Madrenas, and M. Pontes
. OPK - Opistobranquis. (https://opistobranquis.info/
Bardarson, G. G. 1919. Saelindyr vid Island (Mollusca marina islandiae). Skyrsla isl. náttúrufraedisfjelag, (1917-1918): 45-75.
Bardarson, G. G. 1920. Om den marine molluskfauna ved vestkysten af Island. Det Kongelige Danske Videnskabernes Selskabs Biologiske Meddelelser, Kjobenhavn 2(3):1-139.
Barrett, B. E. 1969. Canada’s northeast coast. Oceans 2(2):65- 73.
Basedow, H., and C. Hedley. 1905. South Australian nudibranchs, and an enumeration of the known Australian species. Transactions, Proceedings & Reports of the Royal Philosophical Society of South Australia 29: 134-160, pls. 1-12.
Beaumont, W. I. 1900. Part II.–The benthos (dredging and shore collecting). VII.–Report on the results of dredging and shore- collecting; pp 754-798, In: The fauna and flora of Valencia Harbour on the west coast of Ireland. Proceedings of the Royal Irish Academy, series 3, 5(3):667-854.
Beaumont, W. I. 1900. XII–Report on the opisthobranchiate Mollusca; pp 832-854, In: The fauna and flora of Valencia Harbour on the west coast of Ireland. Proceedings of the Royal Irish Academy, series 3, 5(3):667-854.
Bedulli, D., R. Cattaneo-Vietti, R. Chemello, F. Ghisotti, and F. Giovine. 1995. Gastropoda Opisthobranchia, Divasibranchia, Gymnomorpha, Fascicolo 15, pp. 1-23. In: A. Minelli, A. Ruffo, & S. La Posta (Eds.). Checklist delle specie fauna italiana, Checklist delle specie della Fauna Italiana. Calderini, Bologna.
Behrens, D. W. 1992. Pacific coast nudibranchs, supplement I radula; pp 1-11, illus. Sea Challengers, Monterey, California.
Behrens, D. W. 1991. Pacific Coast nudibranchs : a guide to the opisthobranchs, Alaska to Baja California. Sea Challengers, Monterey, Calif.
Behrens, D. W. 1980. A review of the literature on the opisthobranch fauna of San Francisco Bay. Opisthobranch Newsletter 12(4-12):34-37.
Behrens, D. W. 1980. Pacific coast nudibranchs, a guide to the opisthobranchs of the northeastern Pacific. 112 pp, 162 photos. Sea Challengers, Los Osos, Calif.
Behrens, D. W., and A. Hermosillo. 2005. Eastern Pacific nudibranchs : a guide of the opisthobranchs from Alaska to Central America. Sea Challengers, Monterey, CA.
Bell, R., M. Chandler, R. Buchsbaum, and C. Roman. 2003. Inventory of intertidal habitats: Boston Harbor Islands, a national park area. U.S. Department of the Interior, National Park Service, Northeast Region, Boston, Massachusetts, Technical Report NPS/NERBOST/NRTR-2004/1.
Beltremieux, E. 1884. Faune vivante de la Charente-Inférieure, 147 pp. Mareschal et Martin, La Rochelle.
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Pontes, Miquel, Manuel Ballesteros, Enric Madrenas (2023) "Acanthodoris pilosa" in OPK-Opistobranquis. Published: 19/09/2014. Accessed: 07/06/2023. Available at (https://opistobranquis.info/en/IHH9O)