Emarginula genus of small keyhole limpets , marine gastropod molluscs in the family Fissurellidae.
The oval shell is obliquely conical with a backward-pointing recurved apex . There is a deep incision in the anterior margin. A distinct anal fasciole extends upwards from this incision. The surface is latticed, sculptured with radial ribs. There is no septum inside.
The radula has a dental formula of [many].1.4.1.4.1.[many], with a wide, rectangular, acuspate rachidian tooth. The various genera have a few dozen rows of teeth.
According to the World Register of Marine Species (WoRMS), species within the genus Emarginula include:
The following species are mentioned in other databases : The Indo-Pacific Molluscan Database also mentions the following species with names in current use :
Emarginula curvata Schepman , 1908Emarginula multisquamosa Schepman , 1908Emarginula sublaevis Schepman, 1908Subgenus Emarginula Lamarck , 1801 Emarginula bellula A. Adams , 1851Emarginula cucullata Adams , 1851Emarginula fissurata A. Adams, 1851Emarginula harmilensis Sturany, 1903Emarginula plana Schepman, 1908Emarginula scabricostata A. Adams, 1851Subgenus Emarginula (Subzeidora) Iredale , 1924 Species brought into synonymy Emarginula altilis Gould , 1859: synonym of Variemarginula punctata Emarginula amitina Iredale , 1925: synonym of Emarginula dilecta A. Adams, 1852Emarginula angustata Thiele , 1915: synonym of Tugali decussata Emarginula arabica A. Adams, 1852: synonym of Octomarginula arabica Emarginula arconatii Issel, 1869: synonym of Montfortista panhi Quoy & Gaimard , 1834)Emarginula australis Quoy & Gaimard, 1834: synonym of Montfortia subemarginata (Blainville, 1819)Emarginula bella Gabb, 1865: synonym of Scelidotoma bella Emarginula biangulata G. B. Sowerby III, 1901: synonym of Emarginella biangulata (G. B. Sowerby III, 1901)† Emarginula blainvillii Defrance, 1825 : synonym of † Rimula blainvillii (Defrance, 1825) Emarginula brevirimata Deshayes , 1862: synonym of Montfortula brevirimata Deshayes , 1862)Emarginula clathrata A. Adams & Reeve, 1850: synonym of Montfortista panhi Emarginula clathrata Pease, 1863: synonym of Emarginula dilecta A. Adams, 1852Emarginula conica Lamarck , 1801: synonym of Emarginula fissura (Linnaeus , 1758)Emarginula conica Schumacher, 1817 non Lamarck, 1801: synonym of Emarginula rosea Bell, 1824Emarginula dentigera Heilprin, 1889: synonym of Hemimarginula dentigera Emarginula elata Locard , 1898Emarginula christiaensi Piani, 1985 Emarginula elongata O. G. Costa, 1829: synonym of Emarginula octaviana Coen, 1939Emarginula eximia A. Adams, 1852 : synonym of Emarginella eximia (A. Adams, 1852) Emarginula flindersi Cotton, 1930: synonym of Emarginula convexa Hedley, 1907Emarginula fuliginea Kuroda, 1941: synonym of Variemarginula variegata Emarginula guernei Dautzenberg & Fischer, 1896: synonym of Emarginula tuberculosa Libassi, 1859Emarginula hedleyi Thiele , 1915: synonym of Emarginula candida A. Adams, 1852Emarginula incisula (sic): synonym of Emarginella incisura (A. Adams, 1852) Emarginula incisura A. Adams, 1852 : synonym of Emarginella incisura (A. Adams, 1852) Emarginula kimberti Cotton, 1930: synonym of Laeviemarginula kimberti (Cotton, 1930)Emarginula modesta H. Adams, 1872: synonym of Hemimarginula modesta Emarginula muelleri Forbes & Hanley, 1849: synonym of Emarginula fissura (Linnaeus, 1758)Emarginula ostheimerae Abbott, 1958: synonym of Octomarginula ostheimerae Emarginula panhi Quoy & Gaimard, 1834: synonym of Montfortista panhi (Quoy & Gaimard, 1834)Emarginula papillosa Risso 1826Emarginula huzardii Payraudeau , 1826Emarginula parmophoidea Quoy & Gaimard, 1834: synonym of Tugali elegans Gray , 1843Emarginula peasei Thiele, 1915: synonym of Emarginula dilecta A. Adams, 1852Emarginula picta Dunker, 1860: synonym of Montfortula picta (Dunker, 1860)Emarginula pileata Gould , 1859: synonym of Variemarginula punctata Emarginula pileum Heilprin, 1889: synonym of Hemimarginula pileum Emarginula planulata A. Adams, 1852 : synonym of Emarginella planulata (A. Adams, 1852) Emarginula polygonalis A. Adams, 1852: synonym of Hemitoma polygonalis Emarginula pulchreclathrata Tomlin, 1932: synonym of Emarginula agulhasensis Thiele, 1925Emarginula pumila A. Adams, 1852: synonym of Hemimarginula pumila Emarginula punctata A. Adams, 1852: synonym of Variemarginula punctata (A. Adams, 1852)Emarginula reticulata Sowerby , 1813: synonym of Emarginula fissura (Linnaeus, 1758)Emarginula rugosa Quoy & Gaimard, 1834: synonym of Montfortula rugosa Emarginula scutellata Deshayes, 1863: synonym of Octomarginula scutellata Emarginula sibogae Schepman, 1908: synonym of Emarginella sibogae (Schepman, 1908)Emarginula simpla Christiaens, 1987: synonym of Hemimarginula simpla Emarginula stellata A. Adams, 1852: synonym of Montfortula rugosa Emarginula subclathrata Pilsbry , 1890: synonym of Emarginula dilecta A. Adams, 1852Emarginula subemarginata Blainville, 1819: synonym of Montfortia subemarginata (Blainville, 1819)Emarginula subrugosa Thiele, 1916: synonym of Hemimarginula subrugosa Emarginula sulcifera A. Adams, 1852: synonym of Montfortulana sulcifera Emarginula tricarinata Pilsbry , 1890: synonym of Montfortista panhi (Quoy & Gaimard, 1834)Emarginula tricostata G.B. Sowerby I, 1823: synonym of Hemitoma octoradiata Emarginula vadososinuata Yokoyama, 1922: synonym of Tugalina vadososinuata Emarginula vadum Barnard, 1963: synonym of Emarginula undulata Melvill & Standen, 1903Emarginula variegata A. Adams, 1852: synonym of Variemarginula variegata 
