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WoRMS taxon detailsGeukensia demissa (Dillwyn, 1817)
156859 (urn:lsid:marinespecies.org:taxname:156859)
accepted
Species
Brachidontes demissus (Dillwyn, 1817) · unaccepted > superseded combination
Brachydontes clava Mörch, 1853 · unaccepted > junior subjective synonym
Modiola plicatula Lamarck, 1819 · unaccepted > junior subjective synonym
Modiola semicostata Conrad, 1837 · unaccepted > misspelling - incorrect original spelling
Modiolus demissus (Dillwyn, 1817) · unaccepted > superseded combination
Modiolus demissus var. plicatula Lamarck, 1819 · unaccepted > junior subjective synonym
Mytilus demissus Dillwyn, 1817 · unaccepted > superseded combination
Volsella demissa (Dillwyn, 1817) · unaccepted > superseded combination
marine
(of Mytilus demissus Dillwyn, 1817) Dillwyn, L. W. (1817). A descriptive catalogue of Recent shells, arranged according to the Linnean method; with particular attention to the synonymy. John and Arthur Arch, London, Vol. 1: 1-580 pp.; Vol. 2: 581-1092 pp. + index [29 pp.]., available online at https://www.biodiversitylibrary.org/page/11670899
page(s): 314 [details]
Type locality contained in United States part of the North Atlantic Ocean
type locality contained in United States part of the North Atlantic Ocean [from synonym] [view taxon] [details]
Distribution Gulf of St. Lawrence (unspecified region), northern Gaspe waters, southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to...
Distribution Gulf of St. Lawrence (unspecified region), northern Gaspe waters, southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: eastern Bradelle Valley); Prince Edward Island (from the northern tip of Miscou Island, N.B. to Cape Breton Island south of Cheticamp, including the Northumberland Strait and Georges Bay to the Canso Strait causeway); Cobscook Bay [details]
MolluscaBase eds. (2025). MolluscaBase. Geukensia demissa (Dillwyn, 1817). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=156859 on 2025-07-16
Nomenclatureoriginal description
(of Modiola plicatula Lamarck, 1819) Lamarck, [J.-B. M.] de. (1819). <i>Histoire naturelle des animaux sans vertèbres</i>. Tome sixième, 1re partie, vi + 343 pp. Paris, published by the author. , available online at http://www.biodiversitylibrary.org/item/47441 [details] original description (of Brachydontes clava Mörch, 1853) Mörch [Mørch], O. A. L. (1852-1853). <i>Catalogus conchyliorum quae reliquit D. Alphonso d'Aguirra & Gadea Comes de Yoldi, Regis Daniae Cubiculariorum Princeps, Ordinis Dannebrogici in Prima Classe & Ordinis Caroli Tertii Eques. Fasc. 1, Cephalophora</i>, 170 pp. [1852]; <i>Fasc. 2, Acephala, Annulata, Cirripedia, Echinodermata</i>, 74 [+2] pp. [1853]. Hafniae [Copenhagen]: L. Klein. , available online at http://www.biodiversitylibrary.org/bibliography/12921 [details] original description (of Modiola semicostata Conrad, 1837) Conrad, T. A. (1837). Description of new marine shells, from Upper California. Collected by Thomas Nuttall, Esq. <em>Journal of the Academy of Natural Sciences, Philadelphia.</em> 7: 227-268, pls 17-20., available online at http://biodiversitylibrary.org/page/24676893 page(s): 244 [details] original description (of Mytilus demissus Dillwyn, 1817) Dillwyn, L. W. (1817). A descriptive catalogue of Recent shells, arranged according to the Linnean method; with particular attention to the synonymy. John and Arthur Arch, London, Vol. 1: 1-580 pp.; Vol. 2: 581-1092 pp. + index [29 pp.]., available online at https://www.biodiversitylibrary.org/page/11670899 page(s): 314 [details] basis of record Brunel, P., L. Bosse & G. Lamarche. (1998). Catalogue of the marine invertebrates of the estuary and Gulf of St. Lawrence. <em>Canadian Special Publication of Fisheries and Aquatic Sciences, 126.</em> 405 pp. (look up in IMIS) [details] Available for editors  [request]Othercontext source (Introduced species)
Molnar, J.L., R.L. Gamboa, C. Revenga & M.D. Spalding. (2008). Assessing the global threat of invasive species to marine biodiversity. <em>Frontiers in Ecology and the Environment.</em> 6(9): 485-492., available online at https://www.conservationgateway.org/ConservationPractices/Marine/Pages/marineinvasives.aspx [details] Available for editors
[request]additional source Huber, M. (2010). <i>Compendium of bivalves. A full-color guide to 3,300 of the world's marine bivalves. A status on Bivalvia after 250 years of research</i>. Hackenheim: ConchBooks. 901 pp., 1 CD-ROM. (look up in IMIS) [details] additional source Trott, T. J. (2004). Cobscook Bay inventory: a historical checklist of marine invertebrates spanning 162 years. <em>Northeastern Naturalist.</em> 11, 261-324., available online at http://www.gulfofmaine.org/kb/files/9793/TROTT-Cobscook%20List.pdf [details] Available for editors [request]additional source Fell, P. E. & Williams, J. H. (1985). Distribution of the snail, <i>Melampus bidentatus</i> and the mussel, <i>Geukensia demissa</i>, along the Pataguanset Estuary (Connecticut) in relation to salinity and other tidal marsh invertebrates. <em>The Nautilus.</em> 99(1): 21-28., available online at https://www.biodiversitylibrary.org/page/8276665 [details] additional source Deaton, L. E. & Kempler, K. D. (1989). Occurrence of the ribbed mussel, <i>Geukensia demissa</i>, on the gills of a horseshoe crab, <i>Limulus polyphemus</i>. <em>The Nautilus.</em> 103(1): 42., available online at https://www.biodiversitylibrary.org/page/8278036 [details]  Present Present in aphia/obis/gbif/idigbio Inaccurate Introduced: alien Containing type locality
From regional or thematic species database
Introduced species impact in Caribbean Sea (IHO Sea Area) : Adverse habitat modification [details]Introduced species impact in Caribbean Sea (IHO Sea Area) : Outcompetes native species for resources and/or space [details] Introduced species impact in California (State) : Adverse habitat modification [details] Introduced species impact in California (State) : Outcompetes native species for resources and/or space [details] Introduced species vector dispersal United States part of the North Pacific Ocean (Marine Region) Aquaculture: accidental [details] Unreviewed
Distribution Gulf of St. Lawrence (unspecified region), northern Gaspe waters, southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: eastern Bradelle Valley); Prince Edward Island (from the northern tip of Miscou Island, N.B. to Cape Breton Island south of Cheticamp, including the Northumberland Strait and Georges Bay to the Canso Strait causeway); Cobscook Bay [details]Habitat intertidal and infralittoral of the Gulf and estuary [details] Reproduction separate sexes, usually not dimorphic in shell structure; fertilization occurs within the mantle cavity anf young hatch as pelagic larvae (generalized for group) [details]
To Barcode of Life (255 barcodes)
To Biodiversity Heritage Library (149 publications) (from synonym Modiola plicatula Lamarck, 1819) To Biodiversity Heritage Library (23 publications) To Biodiversity Heritage Library (4 publications) (from synonym Brachidontes demissus (Dillwyn, 1817)) To Biodiversity Heritage Library (95 publications) (from synonym Modiolus demissus (Dillwyn, 1817)) To European Nucleotide Archive, ENA (Geukensia demissa) To GenBank (350 nucleotides; 383 proteins) To Global Biotic Interactions (GloBI) To Global Invasive Species Database (GISD) To Malacopics (Geukensia demissa (Dillwyn, 1817) Canada, Nova Scotia, Digby, 1-15 km off Digby Neck... To NMNH Extant Collection (JPEM 06248) To NMNH Extant Collection (USNM 1481775) To PESI To PESI (from synonym Modiolus demissus (Dillwyn, 1817)) To USNM Invertebrate Zoology Mollusca Collection (from synonym Modiolus demissus (Dillwyn, 1817)) To USNM Invertebrate Zoology Mollusca Collection To Yale Peabody Museum of Natural History (YPM IZ 032910) To ITIS Unreviewed
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