象牙貝屬

象牙貝屬（學名：Dentalium），又名角貝屬，是象牙貝科下的一個屬，為掘足綱動物的代表。其化石最早可追溯至志留紀晚期。牠們生存在不同深度及溫度的海洋中，在海底泥砂中行穴居生活，利用觸手將食物碎屑送入口中。 牠們有著窄小的象牙形圓管狀貝殼，殼表有線條分明的縱肋。殼體朝尖端彎曲且逐漸變細，殼形會隨著年齡增長而慢慢變直。頭部、頭絲和足由較大的前殼口伸出。 Dentalium aciculum Gould, 1859 Dentalium adenense Ludbrook, 1954 Dentalium agassizi Pilsbry and Sharp, 1897 Stained tuskshell Dentalium americanum Chenu, 1843 American tuskshell Dentalium antillarum D'Orbigny, 1842 Dentalium aprinum L., 1766 Dentalium bartletti Henderson, 1920 Dentalium calamus Dall, 1889 Dentalium callipeplum Dall, 1889 Dentalium callithrix Dall, 1889 Dentalium carduum Dall, 1889 Dentalium ceratum (Dall, 1881) Dentalium circumcinctum Watson, 1879 Dentalium dalli Pilsbry & Sharp, 1897 Dentalium dentale L., 1766 European tusk Dentalium diarrhox（英语：Dentalium diarrhox） Watson, 1879 Dentalium didymum Watson, 1879 Dentalium eboreum Conrad, 1846 Ivory tusk Dentalium ecostatum（英语：Dentalium ecostatum） T W Kirk, 1880 Dentalium elephantinum（英语：Dentalium elephantinum） L., 1758 - Elephant tusk Dentalium ensiculus Jeffereys, 1877 Dentalium entale entale (Linnaeus, 1758) Dentalium entale stimpsoni (Henderson, 1920) Dentalium entale Linnaeus, 1758 Dentalium floridense J. B. Henderson, 1920 Dentalium formosum Adams & Reeve, 1850 Formosan tusk Dentalium glaucarena（英语：Dentalium glaucarena） Dell, 1953 Dentalium gouldii（英语：Dentalium gouldii） Dall, 1889 Gould tuskshell Dentalium inversum Deshayes, 1825 Dentalium laqueatum A. E. Verrill, 1885 Reticulate tuskshell Dentalium liodon Pilsbry & Sharp, 1897 Dentalium longitrorsum（英语：Dentalium longitrorsum） Reeve, 1842 Elongate tusk Dentalium meridionale Pilsbry & Sharp, 1897 Dentalium nanum（英语：Dentalium nanum） Hutton, 1873 Dentalium neohexagonum（英语：Dentalium neohexagonum） Sharp & Pilsbry, 1897 Hexagon tuskshell Dentalium occidentale Stimpson, 1851 Dentalium octangulatum Donovan, 1804 Octagonal tusk Dentalium ophiodon Dall, 1881 Dentalium perlongum Dall, 1881 Dentalium pilsbryi Rehder, 1942 Dentalium pretiosum Sowerby, 1860 Indian-money tusk Dentalium rebeccaense Henderson, 1920 Dentalium rectius Carpenter, 1864 Dentalium semistriolatum Guilding, 1834 Half-scratched tusk Dentalium senegalense Dautzenberg, 1891 Senegal tusk Dentalium sowerbyi Guilding, 1834 Dentalium stenochizum Pilsbry and Sharp, 1897 Dentalium suteri（英语：Dentalium suteri） Emerson, 1954 Dentalium taphrium Dall, 1889 Dentalium texasianum Philippi, 1848 Dentalium tiwhana（英语：Dentalium tiwhana） Dell, 1953 Dentalium tubulatum Henderson, 1920 Dentalium vallicolens Raymond, 1904 Trench tuskshell Dentalium vernedei Sowerby, 1860l Vernede's tusk Dentalium vitreum Sars, 1851 Dentalium vulgare da Costa, 1778 Common tusk Dentalium zelandicum（英语：Dentalium zelandicum） Sowerby, 1860 New Zealand tusk †Dentalium akasakensis Hayasaka 1925 †Dentalium alazanum Cooke 1928 †Dentalium angsananum Martin 1922 †Dentalium aratum Tate 1887 †Dentalium arcotinum Forbes 1846 †Dentalium atratum Tate 1887 †Dentalium attenuatum Say 1824 †Dentalium badense Partsch, 1856 †Dentalium bifrons Tate 1887 †Dentalium bocasense Olsson 1922 †Dentalium caduloide Dall 1892 †Dentalium cannaliculatum Klipstein 1843 †Dentalium cossmannianum Pilsbry and Sharp 1897 †Dentalium danai Meyer 1885 †Dentalium decoratum Münster 1841 †Dentalium denotatum Ludbrook 1956 †Dentalium giganteum Sowerby 1846 †Dentalium gonatodes Martin 1885 †Dentalium hamatum Forbes 1846 †Dentalium hanguense Cox 1930 †Dentalium hecetaensis Rohr et al. 2006 †Dentalium inaequale Bronn 1831 †Dentalium indianum Girty 1911 †Dentalium junghuhni Martin 1879 †Dentalium klipsteini Kittl 1891 †Dentalium latisulcatum Tate 1899 †Dentalium lombardicum Kittl 1899 †Dentalium mancorens Olsson 1930 †Dentalium microstria Heilprin 1880 †Dentalium montense Briart and Cornet 1889 †Dentalium moreanum d'Orbigny 1845 †Dentalium neohexagonum Sharp and Pilsbry 1897 †Dentalium neornatum Hayasaka 1925 †Dentalium ovale Cooke 1928 †Dentalium pseudonyma Pilsbry and Sharp 1898 †Dentalium rimosum Bose 1906 †Dentalium rugiferum von Koenen 1885 †Dentalium sandbergeri Cossmann and Lambert 1884 †Dentalium schencki Moore 1963 †Dentalium sexangulum (Gmelin, 1790) †Dentalium simile Münster 1841 †Dentalium solidum Hutton 1873 †Dentalium sorbii King 1850 †Dentalium speyeri Geinitz 1852 †Dentalium sundkrogensis Schnetler 2001 †Dentalium tenuistriatum Martin 1879 †Dentalium tornatissimum Tate 1899 †Dentalium triquetrum Tate 1887 †Dentalium yasilum Olsson 1930 上新世的Dentalium sexangulum化石 中新世的Dentalium badense化石 上新世的Dentalium species化石 Dentalium entale（圖上）及Dentalium vulgare（圖下） 於威爾瓦發現的象牙貝化石 Fossilworks: Dentalium. [2018-04-18]. （原始内容存档于2017-11-07） （英语）.  Walker, Cyril（英语：Cyril Walker (palaeontologist)）; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 114. ISBN 0789489848.  Catalogue of life. [2018-04-18]. （原始内容存档于2016-04-20）.  ITIS. [2018-04-18]. （原始内容存档于2016-04-19）.  Animal Diversity. [2018-04-18]. （原始内容存档于2008-09-07）.  Paleobiology Database. [2018-04-18]. （原始内容存档于2020-04-13）.  Dentalium in the Paleobiology Database（英语：Paleobiology Database）