Knoutsodonta inconspicua

Knoutsodonta inconspicua (Alder & Hancock, 1851)

Knoutsodonta inconspicua Gulen dive resort, March 2012. Collected by Torjus Haukvik by Bernard Picton













































Knoutsodonta inconspicua  (Alder & Hancock, 1851)

 Classification according to Bouchet et al. (2017)
Taxonomic source: World Register of Marine Species (AphiaID: 1259486).

  • Doris inconspicua Alder & Hancock, 1851
  • Onchidoris inconspicua (Alder & Hancock, 1851)




  • Knoutsodonta, from the Greek meaning “lame tooth”, to represent nudibranch species that lack a rachidian or middle tooth.
  • Inconspicua. From latin prefix “in-“, negation + “conspicuus”, illustrious, notable, famous, striking, visible, clearly seen, in sight, in full view.


Known georeferenced records of the species: Knoutsodonta inconspicua
: GROC 2010-2011
: Enric Madrenas
: João Pedro Silva
: Bernard Picton
: Manuel Ballesteros.
: M@re Nostrum
: Altres fonts
: Marine Regions

References for the species: Knoutsodonta inconspicua


    Western Mediterranean:0 out of 5 stars
    Eastern Mediterranean:0 out of 5 stars
    Atlantic Ocean:0 out of 5 stars

This chart displays the monthly observation probability for Knoutsodonta inconspicua based on our own records.

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    Adams, A. A., & Adams, H. (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.
    Alder, J., & Hancock, A. (1851). Monographie des Mollusques nudibranches de l’Angleterre, pt 5 (extract). Annales Des Sciences Naturelle, Paris, Series 3, 16:219-220.
    Alder, J., & Hancock, A. (1851). A monograph of the British nudibranchiate Mollusca: with figures of all the species. Ray Society, London.
    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. Universitat de Barcelona.
    Ballesteros, M., Madrenas, E., & Pontes, M. (2021). OPK - Opistobranquis [Reference].
    Cervera, J. L., Templado, J., García-Gómez, J. C., Ballesteros, M., Ortea, J., García, F. J., Ros, J., & Luque, A. A. (1988). Catálogo actualizado y comentado de los Opistobranquios (Mollusca, Gastropoda) de la Península Ibérica, Baleares y Canarias, con algunas referencias a Ceuta y la isla de Alborán. Iberus, Supl. 1: 1-84.
    Cervera, J. L., Calado, G., Gavaia, C., Malaquías, M. A. E., Templado, J., Ballesteros, M., García-Gómez, J. C., & Megina, C. (2004). An annotated and updated checklist of the opisthobranchs (Mollusca: Gastropoda) from Spain and Portugal (including islands and archipelagos). Boletín Instituto Español de Oceanografía, 20 (1-4): 1-111. L.
    Cornet, R., & Marchad, M. (1951). Inventaire de la faune marine de Roscoff Mollusques. Travaux de La Station Biologique de Roscoff, Suppl 5:1-80.
    Evertsen, J., & Bakken, T. (2013). Diversity of Norwegian sea slugs (Nudibranchia): new species to Norwegian coastal waters and new data on distribution of rare species. Fauna Norvegica 32: 45-52.
    Evertsen, J., & Bakken, T. (2005). Nudibranch diversity (Heterobranchia, Gastropoda) along the coast of Norway. Fauna Norvegica, 25: 1-37.
    Furfaro, G., & Trainito, E. (2017). A new species from the Mediterranean Sea and North-Eastern Atlantic Ocean: Knoutsodonta pictoni n. sp. (Gastropoda, Heterobranchia, Nudibranchia). Biodiversity Journal, 2017, 8 (2): 725–738.
    Garcia, F. J., & Bertsch, H. (2009). Diversity and distribution of the Gastropoda Opisthobranchia from the Atlantic Ocean: A global biogeographic approach. Scientia Marina, 73(1), 153–160.
    Høisæter, T. (1986). An annotated check-list of marine molluscs of the Norwegian coast and adjacent waters. Sarsia 71(2):73-175.
    Just, H., & Edmuns, M. (1985). North atlantic nudibranchs (Mollusca) seen by Henning Lemche. Ophelia Supplement 2: 1-150.
    Long, S. J. (2006). Bibliography of Opisthobranchia 1554-2000. Bayside Books & Press, Tustin, CA, U.S.A. 672p.
    McDonald, G. (2009). Bibliographia Nudibranchia. 2nd Online Edition, Annotated. 1072 pp  Institute of Marine Sciences, University of California, Santa Cruz.
    Ortea, J., & Ballesteros, M. (1982). Sobre algunos Onchidoris Blainville, 1816 (Mollusca, Opisthobranchia, Doridacea) del litoral ibérico. Investigación Pesquera 46 (2): 239-254.
    Ortea, J., & Urgorri, V. (1979a). Una nueva especie de Onchidoris (Moluscos, Opistobranquios, Doridáceos) del Norte y Noroeste de España, Onchidoris cervinoi n sp. Cahiers de Biologie Marine 20: 507-513.
    Picton, B. E., & Morrow, C. (1994). Onchidoris inconspicua accessed through: Nudibranchs of the British Isles on 2014-12-14.
    Picton, B. E., & Morrow, C. (1994). A Field guide to the Nudibranchs of the British Isles. Immel Publishing Ltd. London: 143 pp.
    Rudman W.B. et al. (1998, 2010). Onchidoris inconspicua accessed through: Sea Slug Forum on 2014-12-14.
    Seaward, D. R. (1982). Sea area atlas of the marine molluscs of Britain and Ireland. Conchological Society of Great Britain & Ireland / Nature Conservancy Council, 242 pp.
    Smith, I. (2012, 2015). Onchidoris inconspicua accessed through: The Conchological Society of Great Britain and Ireland on 2015-05-18.
    Step, E. (1945). Shell life. An introduction to the British Mollusca, 443 pp, 32 pls. Frederick Warne & Co., Ltd., London.
    Thompson, T. E. (1964). Grazing and the life cycles of British nudibranchs, pp 275-297, In: D. J. Crisp (ed ), Grazing in terrestrial and marine environments. British Ecological Society Symposium No. 4, 322 pp Blackwell, Oxford.
    Thompson, T. E. (1988). Molluscs: benthic opisthobranchs (Mollusca: Gastropoda) keys and notes for the  identification of the species. (2nd ed.). E. J. Brill/Dr. W. Backhuys. Avon, Great Britain: 356 pp.
    Thompson, T. E., & Brown, G. H. (1976). British opisthobranch molluscs Mollusca: Gastropoda; keys and notes for the identification of the species (011619775). Acad. Pr.
    Thompson, T. E., & Brown, G. H. (1984). Biology of Opisthobranch Molluscs. Vol. 2. Ray Society, London 156, pp. 229:
    Todd, C. D. (1981). The ecology of nudibranch molluscs. Oceanography & Marine Biology Annual Review 19:141-234.
    Todd, C. D., Lambert, W. J., & Davies, J. (2001). Some perspectives on the biology and ecology of nudibranch molluscs: Generalisations and variations on the theme that prove the rule. Bollettino Malacologico 37(5-8):105-120; figs. 1-8.
    White, K. M. (1938). The nomenclature of British nudibranch Mollusca by Alder and Hancock and by Eliot correlated with that of British Marine Mollusca by Winckworth. Journal of Conchology 21(1):14-19.
    Winckworth, R. (1932). The British marine Mollusca. Journal of Conchology 19(7):211-252.

    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.

Further reading

Cite this article as:

Ballesteros, Manuel, Enric Madrenas, Miquel Pontes (2021) "Knoutsodonta inconspicua" in OPK-Opistobranquis. Published: 20/10/2014. Accessed: 20/09/2021. Available at (

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