Nacella SCHUMACHER 1817

• Main Authors: González-Wevar, Claudio A., Hüne, Mathias, Rosenfeld, Sebastián, Nakano, Tomoyuki, Saucède, Thomas, Spencer, Hamish, Poulin, Elie
• Format: Text
• Language: unknown
• Published: Zenodo 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Patellida; Nacellidae; Nacella; Antarctic; Southern Ocean; The Antarctic; Kerguelen; Kerguelen Islands; Pacific; Indian; New Zealand; Gonzalez; Nautilus; Segovia; Mansilla; Antarc*
• Online Access: https://dx.doi.org/10.5281/zenodo.5718880; https://zenodo.org/record/5718880

GENUS NACELLA SCHUMACHER, 1817 Nacella Schumacher, 1817: 179. Type species (by monotypy) Nacella mytiloides Schumacher, 1817 (= Patella mytilina Helbling, 1779). Patinigera Dall, 1905: 53. Type species (by original designation) Patella magellanica Gmelin, 1791. New Synonymy. Revised diagnosis: The shell is of medium to moderately large size and the thickness varies from hard and robust in some species ( N. magellanica , N. deaurata , N. delesserti , N. terroris , N. concinna and N. clypeater ) to thin and fragile in others ( N. kerguelenensis , N. flammea , N. edgari , N. yaghana sp. nov. and N. mytilina ). The shell morphology is typically elliptical, high-arched, with the apex strongly curved forward and downward, sometimes almost at the anterior end. The surface of the shell varies from very smooth (e.g. N. mytilina ) to strongly radially ridged (e.g. N. magellanica ). The external shell colour is pale-olive to brownish, the apex coppery; the inside is silvery iridescent to reddish bronze. Remarks: Based on shell morphology, the genus Nacella has traditionally been divided into Nacella s. str. and the subgenus Patinigera (Powell, 1973). Members of Nacella s. str. are characterized by a thin and fragile shell, they inhabit seaweeds and are restricted to southern South America ( N. mytilina ) and the Kerguelen Islands ( N. kerguelenensis ), whereas the remaining species were included in Patinigera and exhibit solid shells, are typical inter- and subtidal rocky dwellers, grazers and are broadly distributed in the Southern Ocean. Nevertheless, the distinction between Nacella and Patinigera was not corroborated by molecular analyses; indeed, the respective type species are very closely related (González-Wevar et al. , 2010, 2011a, 2017; this study). NACELLA YAGHANA GONZÁLEZ- WEVAR & NAKANO : Published as part of González-Wevar, Claudio A., Hüne, Mathias, Rosenfeld, Sebastián, Nakano, Tomoyuki, Saucède, Thomas, Spencer, Hamish & Poulin, Elie, 2019, Systematic revision of Nacella (Patellogastropoda: Nacellidae) based on a complete phylogeny of the genus, with the description of a new species from the southern tip of South America, pp. 303-336 in Zoological Journal of the Linnean Society 186 on page 307, DOI: 10.1093/zoolinnean/zly067, http://zenodo.org/record/5718878 : {"references": ["Schumacher HFC. 1817. Essai d'un nouveau systeme des habitations des Vers Testaces. De l'Imprimerie de M le directeur Schultz a Copenhagen.", "Helbling GS. 1779. Beitrage zur Kenntnis neuer und seltener Konchylien. Abhandlungen der Koniglich bohmischen Geselschaft der Wissenschaften 4: 102 - 131.", "Dall WH. 1905. Notes on some preoccupied names of mollusks. Nautilus 18: 1 - 113.", "Gmelin JF. 1791. Vermes. In: Gmelin JF, ed. Systema Naturae per Regna Tria Naturae, ed. 13. Leipzig, Germany: Tome 1. G. E. Beer, 3021 - 3910.", "Powell AWB. 1973. The patellid limpets of the World (Patellidae). In: Abbot RT ed. Indo-Pacific Mollusca: monographs of the marine mollusks of the world with emphasis on those of the tropical western Pacific and Indian Oceans, Vol. 3. Auckland, New Zealand: Auckland Institute and Museum.", "Gonzalez-Wevar CA, Nakano T, Canete JI, Poulin E. 2010. Molecular phylogeny and historical biogeography of Nacella (Patellogastropoda: Nacellidae) in the Southern Ocean. Molecular Phylogenetics and Evolution 56: 115 - 124.", "Gonzalez-Wevar CA, Nakano T, Canete JI, Poulin E. 2011 a. Concerted genetic, morphological and ecological diversification in Nacella limpets in the Magellanic Province. Molecular Ecology 20: 1936 - 1951.", "Gonzalez-Wevar CA, Hune M, Segovia NI, Nakano T, Spencer HG, Chown S, Saucede T, Johnstone G, Mansilla A, Poulin E. 2017. Following the Antarctic Circumpolar Current: patterns and processes in the biogeography of the limpet Nacella (Mollusca: Patellogastropoda) across the Southern Ocean. Journal of Biogeography 44: 861 - 874."]}