象牙貝屬

Striodentalium
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。

**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 - Dentalium diarrhox Watson, 1879- Dentalium didymum Watson, 1879- Dentalium eboreum Conrad, 1846 Ivory tusk - Dentalium ecostatum T W Kirk, 1880- 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 Dell, 1953- 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 Reeve, 1842 Elongate tusk - Dentalium meridionale Pilsbry & Sharp, 1897- Dentalium nanum Hutton, 1873- 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 Emerson, 1954- Dentalium taphrium Dall, 1889- Dentalium texasianum Philippi, 1848- 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 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**
File: Dentaliidae - Dentalium sexangulum.JPG|上新世的Dentalium sexangulum化石
File:Dentalium badense 01.JPG|中新世的Dentalium badense化石
File: Mollusca - Dentalium.JPG|上新世的Dentalium species化石
File:Dentaliidae - Sowerby.png|Dentalium entale（圖上）及Dentalium vulgare（圖下）
File:Dentalium sp.1 - Plioceno.JPG|於威爾瓦發現的象牙貝化石

**參考文獻**

**外部連結**
  Dentalium in the Paleobiology Database