象牙貝屬

象牙貝屬（學名：），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。

 特徵 
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。

 物種 
 現生種

 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 
  Watson, 1879
 Dentalium didymum Watson, 1879
 Dentalium eboreum Conrad, 1846 Ivory tusk 
  T W Kirk, 1880
  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
  Dell, 1953
  Dall, 1889 Gould tuskshell
 Dentalium inversum Deshayes, 1825
 Dentalium laqueatum A. E. Verrill, 1885 Reticulate tuskshell
 Dentalium liodon Pilsbry & Sharp, 1897
  Reeve, 1842 Elongate tusk 
 Dentalium meridionale Pilsbry & Sharp, 1897
  Hutton, 1873
  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
  Emerson, 1954
 Dentalium taphrium Dall, 1889
 Dentalium texasianum Philippi, 1848
  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 
  Sowerby, 1860 New Zealand tusk

 化石種

 †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

 圖片 

 參考文獻 

 外部連結 
 Dentalium in the Paleobiology Database

Category:象牙貝科