Pyramidella is a genus of minute to medium-sized sea snails, marine gastropod molluscs in the subfamily Pyramidellinae of the family Pyramidellidae, the pyrams and their allies.
Pyramidella is the type genus of the family Pyramidellidae.
Nomenclature The generic name Pyramidella Lamarck, 1799, has been validated under the Plenary Powers of the ICZN, Opinion 386 (1955). The name Obeliscus Anonymus, 1797 [= Obeliscus Gray, 1847] has also been used for this genus, whereas the name Pyramidella was used for the genus now known as Otopleura Fischer, 1885.
General description The shell has an elongate-conic shape, slightly striated. The many whorls of the teleoconch are usually inflated and regularly increasing. They are longitudinally ribbed or smooth. The semioval aperture is entire, widened at its base and rounded in front. .The columella has one to three folds. The sharp outer lip is entire, inferiorly sub-perforated and often plicate within with three transverse folds. The shell is usually larger than in Turbonilla. The thin operculum is horny, ovate, elongated, with very fine elements and oblique folds and folds oblique. The shell lacks an epidermis.Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 8; 1909 G.W. Tryon, Manual of Conchology vol. VIII p. 295Kiener (1840). General species and iconography of recent shells : comprising the Massena Museum, the collection of Lamarck, the collection of the Museum of Natural History, and the recent discoveries of travellers; Boston :W.D. Ticknor,1837
The shells are generally quite small, of an elegant form, elongated, marked with more or less deep spots. The general color of the body of these mollusca, is of a dull white. The operculum only, and the edge of the mantle are yellowish.
The animal has a head surmounted by broad, rather long tentacles, formed like a pointed horn, and open on the side. The mouth is situated in a flattened, wide, dilated, and quite deeply two-lobed muzzle, separated from the foot by a groove. The respiratory cavity open throughout the whole length of the mantle, bearing on its right margin a long and narrow branchia. The heart has a direction from right to left. The rectum and uterus are attached to each other along the branchiae, and terminate in an ear-shaped gutter, produced by the margin of the mantle. The mucous follicles line the upper wall of the cavity. The foot is round, without a marginal furrow, passing down before in form of an ear-shaped shield, and bearing posteriorly a membranous operculum, with laminas destitute of a spire, which possesses one or two notches to slip upon the folds of the columella.
Species Species within the genus Pyramidella include:
Pyramidella adamsi Carpenter, 1864 Pyramidella africana Bartsch, 1915 Pyramidella alfredensis Bartsch, 1915 Pyramidella ava Bartsch, 1926 Pyramidella bairdi Dall & Bartsch, 1909 Pyramidella bicolor Menke, 1854 Pyramidella camara Bartsch, 1927Rosenberg, G. (2010). Pyramidella camara Bartsch, 1927. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533354 on 2011-03-15 † Pyramidella canaliculata Gabb, 1873 Pyramidella corrugata Lamarck, 1822WoRMS (2010). Pyramidella corrugata. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208420 on 2011-03-15 Pyramidella dolabrata (Linnaeus, 1758)WoRMS (2010). Pyramidella dolabrata (Linnaeus, 1758). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208421 on 2011-03-15 Pyramidella elenensis Bartsch, 1924 Pyramidella fastigium (A. Adams, 1855) Pyramidella gracilis A. AdamsWoRMS (2010). Pyramidella gracilis A. Adams. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208427 on 2011-03-15 Pyramidella guardiarioorum Poppe, Tagaro & Stahlschmidt, 2015 Pyramidella hancocki Strong & Hertlein, 1939 Pyramidella hastata (A. Adams in Sowerby, 1854) Pyramidella linearum Pilsbry & Lowe, 1932 Pyramidella magdalenensis Bartsch, 1917 Pyramidella mexicana Dall & Bartsch, 1909 Pyramidella minor (E. A. Smith, 1904) Pyramidella moffati Dall & Bartsch, 1906 † Pyramidella nanggulanica Finlay, 1927 Pyramidella nisoides E. von Martens, 1904 Pyramidella ovata de Folin, 1873 Pyramidella panamensis Dall &Bartsch, 1909 Pyramidella plicata (Laseron, 1959) - unreplaced junior homonym of Pyramidella plicata Lamarck, 1816 Histoire naturelle des animaux sans vertèbres : les caractères généraux et particuliers de ces animaux, leur distribution, leurs classes, leurs families, leurs genres, et la citation des principales espèces qui s'y rapportent; précédée d'une introduction vol. 9 Pyramidella pyrrha Bartsch, 1915 Pyramidella sanctaehelenae (E. A. Smith, 1890)Rosenberg, G. (2010).Pyramidella sanctaehelenae (E. A. Smith, 1890). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533356 on 2011-03-15 Pyramidella scitula (A. Adams, 1854)WoRMS (2010). Pyramidella scitula Adams. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208428 on 2011-03-15 Pyramidella subdolabrata (Mörch, 1854)Rosenberg, G. (2010). Pyramidella subdolabrata (Mörch, 1854). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533357 on 2011-03-15 Pyramidella subglabra Odhner, 1919WoRMS (2010). Pyramidella subglabra Odhner, 1919. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208422 on 2011-03-15 Pyramidella terebelloides (A. Adams, 1854)WoRMS (2010). Pyramidella terebelloides Adams. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208423 on 2011-03-15 Pyramidella turrita A. Adams, 1855
Taxa inquirenda Pyramidella curtissima Locard, 1897 Pyramidella obeliscus W. H. Turton, 1932 Pyramidella suavissima Preston, 1905 Pyramidella sykesi Preston, 1905 (original combination) Pyramidella tarpeia Bartsch, 1915
Subgenera and species brought into synonymy
Pyramidella (Agatha) A. Adams, 1860: synonym of Agatha A. Adams, 1860 Pyramidella (Longchaeus) Mörch, 1875: synonym of Longchaeus Mörch, 1875 Pyramidella (Syrnola) A. Adams, 1860: synonym of Syrnola A. Adams, 1860 Pyramidella (Tiberia) Dall & Bartsch, 1906: synonym of Tiberia Jeffreys, 1884 Pyramidella (Voluspa) Dall & Bartsch, 1904: synonym of Longchaeus Mörch, 1875 Pyramidella achates (Gould, 1853): synonym of Longchaeus achates (A. Gould, 1853) Pyramidella aclis A. Adams, 1853: synonym of Rissosyrnola aclis (A. Adams, 1853) (original combination) Pyramidella acus (Gmelin, 1791) - needle pyram:Rosenberg, G. (2010). Pyramidella acus (Gmelin, 1791). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208425 on 2011-03-15 synonym of Longchaeus acus (Gmelin, 1791) Pyramidella affinis (Laseron, 1959): synonym of Chrysallida affinis (Laseron, 1959) Pyramidella aganea Bartsch, 1915: synonym of Syrnola aganea (Bartsch, 1915) Pyramidella ambigua Gould, 1849: synonym of Rissoina ambigua (Gould, 1849) (original combination) Pyramidella aprustica Crema, 1903: synonym of Euparthenia bulinea (Lowe, 1841) Pyramidella arenosa Conrad, 1843: synonym of Longchaeus suturalis (H. C. Lea, 1843) Pyramidella auricoma Dall, 1889: synonym of Longchaeus auricoma (Dall, 1889) Pyramidella auriscati (Chemnitz, 1795):WoRMS (2010). Pyramidella auriscati (Chemnitz, 1795). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208418 on 2011-03-15 synonym of Otopleura auriscati (Holten, 1802) Pyramidella balteata (A. Adams, 1855): synonym of Tiberia balteata (A. Adams, 1855) Pyramidella canaliculata (G.B. Sowerby III, 1874): synonym of Pyramidella insularum Pilsbry, 1922 † Pyramidella cancellata Nyst, 1836: synonym of † Sandbergeria cancellata (Nyst, 1836) † Pyramidella candida Mørch, 1875: synonym of Longchaeus candidus (Mörch, 1875) Pyramidella capensis (Thiele, 1925): synonym of Odostomia capensis Thiele, 1925 Pyramidella ceylanica Preston, 1905: synonym of Kleinella ceylanica (Preston, 1905) Pyramidella cincta Reeve, 1842: synonym of Milda cincta (Reeve, 1842) Pyramidella conica C.B. Adams, 1852: synonym of Longchaeus conicus (C.B. Adams, 1852) Pyramidella crenulata (Holmes, 1859): synonym of Longchaeus suturalis (H. C. Lea, 1843) Pyramidella denticulata (G.B. Sowerby II, 1865): synonym of Colsyrnola ornata (Gould, 1861) † Pyramidella diademata Maury, 1917: synonym of Longchaeus suturalis (H. C. Lea, 1843) † Pyramidella exarata Michaud, 1838: synonym of † Palaeostoa exarata (Michaud, 1838) (new combination) Pyramidella folinii Dall, 1889:Rosenberg, G. (2010). Pyramidella folinii Dall, 1889. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=533355 on 2011-03-15 synonym of Longchaeus folinii (Dall, 1889) Pyramidella fulva G.B. Sowerby II, 1865: synonym of Colsyrnola brunnea (A. Adams, 1854) Pyramidella fusca (C. B. Adams, 1839): synonym of Sayella fusca (C. B. Adams, 1839) Pyramidella garrettii Tryon, 1886: synonym of Milda garretti (Tryon, 1886) Pyramidella glans Reeve, 1842: synonym of Otopleura glans (Reeve, 1842) (original combination) Pyramidella halaibensis (Sturany, 1903): synonym of Tropaeas halaibensis (Sturany, 1903) Pyramidella hera Bartsch, 1915: synonym of Syrnola hera (Bartsch, 1915) Pyramidella humilis Preston, 1905: synonym of Quirella humilis (Preston, 1905) Pyramidella inopinata (Schander, 1994):WoRMS (2010). Pyramidella inopinata (Schander, 1994). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224462 on 2011-03-15 synonym of Longchaeus inopinatus (Schander, 1994) Pyramidella insularum Pilsbry, 1922: synonym of Longchaeus insularum (Pilsbry, 1922) † Pyramidella jamaicensis Dall, 1896: synonym of † Longchaeus jamaicensis (Dall, 1896) † Pyramidella kelirensis (K. Martin, 1916): synonym of † Longchaeus menadensis (Schepman, 1907) † Pyramidella laeviuscula S. V. Wood, 1842: synonym of † Longchaeus plicosus (Bronn, 1838) Pyramidella lischkei Dall & Bartsch, 1906: synonym of Styloptygma taeniatum (A. Adams, 1863) Pyramidella lissa (A. E. Verrill, 1884): synonym of Eulimella lissa A. E. Verrill, 1884 Pyramidella maculosa Lamarck, 1822: synonym of Longchaeus maculosus (Lamarck, 1822) Pyramidella magnifica Adams & Reeve, 1850: synonym of Otopleura auriscati (Holten, 1802) Pyramidella mazatlanica Dall & Bartsch, 1909: synonym of Longchaeus mazatlanicus (Dall & Bartsch, 1909) Pyramidella mediterranea Monterosato, 1880: synonym of Tiberia minuscula (Monterosato, 1880) (dubious synonym) Pyramidella minuscula Monterosato, 1880: synonym of Tiberia minuscula (Monterosato, 1880) Pyramidella mitralis A. Adams, 1853:WoRMS (2010). Pyramidella mitralis A. Adams, 1853. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208416 on 2011-03-15 synonym of Otopleura mitralis (A. Adams, 1855) Pyramidella modica (A. Adams, 1860): synonym of Syrnola modica(A. Adams, 1860) Pyramidella nitida (A. Adams, 1854): synonym of Otopleura nitida (A. Adams, 1854) Pyramidella nitidula (A Adams, 1860): synonym of Tiberia nitidula (A. Adams, 1860)