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Frank Swinnen

  • Biodiversity Journal, 9 (4): 325-332

    Carlo Smriglio, Paolo Mariottini & Frank Swinnen
    Jujubinus browningleeae n. sp. (Gastropoda Trochidae) from the Atlantic Ocean, a new member of the “smooth” Jujubinus Monterosato, 1884 complex
    https://doi.org/10.31396/Biodiv.Jour.2018.9.4.325.332

    ABSTRACT
    A new species of the gastropod family Trochidae Rafinesque, 1815, Jujubinus browningleeae n. sp., based on morphological characters of the shell, is here described. The new taxon is actually known only from the Gorringe Bank, located off Cape St. Vincent (Portugal, North-Eastern Atlantic). The new taxon is compared with members of the J. curinii species complex, which are morphologically the most similar congeners.

  • Biodiversity Journal, 8 (4): 907-914

    Danilo Scuderi, Frank Swinnen & Josè Templado
    A new Vermetidae from the Eastern Atlantic: Vermetus bieleri n. sp. (Gastropoda Caenogastropoda)

    ABSTRACT
    A new species of the worm-snail Vermetus Daudin, 1800, V. bieleri n. sp. (Gastropoda Caenogastropoda), is here described as new for Madeira and the Canary Islands. The species morphologically resembles the Mediterranean congener V. triquetrus Bivona, 1832, from which it is here distinguished on the basis of morphological characters of the shell, the protoconch and the external soft parts. Comparisons of the new vermetid with other similar species are hereafter reported.

  • Biodiversity Journal, 15 (4): 829-844

    Franck Boyer, Walter Renda & Frank Swinnen
    Revision of the cystiscid fauna (Neogastropoda Volutoidea) from Ascension and St. Helena Islands, Southern Atlantic
    https://doi.org/10.31396/Biodiv.Jour.2024.15.4.829.844
    https://www.zoobank.org/BA944BA4-613C-42D7-917C-A0EA215A2608

    ABSTRACT
    The cystiscid fauna from Ascension and St. Helena is studied on the ground of semi-intensive samplings worked during the years 2014–2019 by the Shallow Marine Surveys Group (Falklands, United Kingdom). The study of the shell morphology and of its variability allows to describe as new three Gibberula species in Ascension Island: G. monticola n. sp., G. oceanica n. sp. and G. gemella n. sp. The three Volvarina species reported from Ascension by E.A. Smith (1890b) look to result from wrong records in the literature. Marginella (Volvaria) consanguinea E.A. Smith, 1890 is recognized in the fauna from St. Helena and provisionally replaced in the genus Plesiocystiscus, together with a new species described as P. meridionalis n. sp. and wrongly recognized by E.A. Smith (1890a) as corresponding to Granula cinerea Jousseaume, 1875. A lectotype is appointed among the syntypes of Marginella consanguinea. The species Marginella (Volvaria) atomus E.A.Smith, 1890 described from St. Helena was not found in the samplings under study. Due to the similarities observed between the cystiscid fauna from St. Helena and that from South Africa, the occurrence of transportation of live specimens or of empty shells in seaweeds from South Africa to St. Helena deserves to be verified. The documentation of live animals of cystiscid species of St. Helena is required for a verification of the generic status of the considered species, of the possible occurrence of sibling species, and for possible comparison with the fauna of South Africa.

  • Biodiversity Journal, 10 (4): 359-364

    Carlo Smriglio, Paolo Mariottini & Frank Swinnen
    Jujubinus silbogomerus n. sp. (Gastropoda Trochidae) from the Canary Islands, Atlantic Ocean
    https://doi.org/10.31396/Biodiv.Jour.2019.10.4.359.364

    ABSTRACT
    Based on shell characters, a new species of the gastropod family Trochidae, Jujubinus silbogomerus n. sp., is described from the Atlantic Ocean. The new taxon is known from the type locality only, the Canary Islands. It was compared with the most closely related species of this geographical area as well as with the Atlantic and Mediterranean Jujubinus Monterosato, 1884 showing marked sculpture. The peculiar morphology of the teleoconch microsculpture and sculpture of this new taxon allows an easy identification.