Emarginula
Emarginula is a genus of small keyhole limpets, marine gastropod molluscs in the family Fissurellidae.
Description
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.Radula
The radula has a dental formula of .1.4.1.4.1., with a wide, rectangular, acuspate rachidian tooth.The various genera have a few dozen rows of teeth.
Species
According to the World Register of Marine Species, species within the genus Emarginula include:- Emarginula adamsiana Sowerby in Adams & Sowerby, 1863
- Emarginula adriatica Costa O.G., 1829
- Emarginula agulhasensis Thiele, 1925
- Emarginula alba Watson, 1897
- Emarginula amyda Shikama, 1962
- Emarginula angusta McLean, 1970
- Emarginula bicancellata Montrouzier, 1860
- Emarginula bonfittoi Smriglio & Mariottini, 2001
- Emarginula camilla Melvill & Standen, 1903
- Emarginula candida Adams, 1852
- Emarginula choristes Dall, 1925
- Emarginula christiaensi Piani, 1985
- Emarginula clypeus Adams, 1852
- Emarginula compta Habe, 1953
- Emarginula concinna Adams, 1852
- Emarginula connectens Thiele, 1915
- Emarginula connelli Kilburn, 1978
- Emarginula convexa Hedley, 1907
- Emarginula costulata Deshayes, 1863
- Emarginula crassa Sowerby, 1812
- Emarginula crassicostata Sowerby in Adams & Sowerby, 1863
- Emarginula curvamen Iredale, 1925
- Emarginula cuvieri Audouin, 1827
- Emarginula decorata Deshayes, 1863
- Emarginula devota Thiele, 1915
- Emarginula dictya McLean, 1970
- Emarginula dilecta Adams, 1852
- Emarginula divae
- Emarginula dubia Schepman, 1908
- Emarginula fenestrella Deshayes, 1863
- Emarginula fissura - slit limpet
- Emarginula foveolata Schepman, 1908
- * Emarginula foveolata fugitai Habe, 1953
- Emarginula fragilis Yokoyama, 1920
- Emarginula fulginea Adams, 1851
- Emarginula gabensis
- Emarginula gigantea Poppe, 2008
- Emarginula hataii Habe, 1953
- Emarginula hawaiiensis Dall, 1895
- Emarginula hosoyai Habe, 1953
- Emarginula huzardii
- Emarginula icosisculpta Simone & Cunha, 2014
- Emarginula imaizumi Dall, 1926
- Emarginula intervecta Locard, 1898
- Emarginula japonica Sowerby in Adams & Sowerby, 1863
- Emarginula kashimaensis Shikama, 1962
- Emarginula koon Kilburn, 1978
- Emarginula longifissa Sowerby, 1866
- Emarginula macclurgi Kilburn, 1978
- Emarginula maculata Adams in Adams & Sowerby, 1863
- Emarginula micans Adams, 1852
- Emarginula multistriata Jeffreys, 1882
- Emarginula natalensis Barnard, 1963
- Emarginula nigromaculata
- Emarginula nordica Pérez Farfante, 1947 - northern emarginula
- Emarginula obovata Adams, 1852
- Emarginula octaviana Coen, 1939
- Emarginula oppressa Barnard, 1963
- Emarginula paivana
- Emarginula patula Cotton, 1930
- Emarginula paucipunctata Schepman, 1908
- Emarginula phrixodes Dall, 1927 - ruffled emarginula
- Emarginula phrygium Herbert & Kilburn, 1985
- Emarginula puncticulata Adams, 1852
- Emarginula punctulum Piani, 1980
- Emarginula pustula Thiele in Küster, 1913
- Emarginula regia Habe, 1953
- Emarginula retecosa Adams, 1851
- Emarginula rosea Bell, 1824
- Emarginula scabriuscula Adams, 1852
- Emarginula sicula Gray, 1825 - dagger emarginula
- Emarginula sinica Lu, 1986
- Emarginula solidula Costa, 1829
- Emarginula souverbiana Pilsbry, 1890
- Emarginula spinosa Deshayes, 1863
- Emarginula striatula Quoy and Gaimard, 1834 - dagger emarginula
- Emarginula subtilitexta Verco, 1908
- Emarginula superba Hedley, 1906
- Emarginula suspira Simone & Cunha, 2014
- Emarginula tenera Locard, 1892
- Emarginula tenuicostata Sowerby, 1863
- Emarginula teramachii Habe, 1953
- Emarginula textilis Gould, 1859 in 1859-61
- Emarginula thomasi Crosse, 1864
- Emarginula thorektes Kilburn, 1978
- Emarginula tosaensis Habe, 1953
- Emarginula tuberculosa Libassi, 1859 - tuberculate emarginula
- Emarginula undulata Melvill & Standen, 1903
- Emarginula velascoensis Shasky, 1961
- Emarginula velascoi Rehder, 1980
- Emarginula viridicana Herbert & Kilburn, 1985
- Emarginula xishaensis Lu, 1986
The Indo-Pacific Molluscan Database also mentions the following species with names in current use :
- Emarginula curvata Schepman, 1908
- Emarginula multisquamosa Schepman, 1908
- Emarginula sublaevis Schepman, 1908
- Emarginula bellula Adams, 1851
- Emarginula cucullata Adams, 1851
- Emarginula fissurata Adams, 1851
- Emarginula harmilensis Sturany, 1903
- Emarginula plana Schepman, 1908
- Emarginula scabricostata Adams, 1851
;Species brought into synonymy:
- Emarginula altilis Gould, 1859: synonym of Variemarginula punctata
- Emarginula amitina Iredale, 1925: synonym of Emarginula dilecta A. Adams, 1852
- Emarginula angustata Thiele, 1915: synonym of Tugali decussata A. Adams, 1852
- Emarginula arabica A. Adams, 1852: synonym of Octomarginula arabica
- Emarginula arconatii Issel, 1869: synonym of Montfortista panhi
- Emarginula australis Quoy & Gaimard, 1834: synonym of Montfortia subemarginata
- Emarginula bella Gabb, 1865: synonym of Scelidotoma bella
- Emarginula biangulata Sowerby, 1901: synonym of Emarginella biangulata
- † Emarginula blainvillii Defrance, 1825: synonym of † Rimula blainvillii
- Emarginula brevirimata Deshayes, 1862: synonym of Montfortula brevirimata
- Emarginula clathrata A. Adams & Reeve, 1850: synonym of Montfortista panhi
- Emarginula clathrata Pease, 1863: synonym of Emarginula dilecta A. Adams, 1852
- Emarginula conica Lamarck, 1801: synonym of Emarginula fissura
- Emarginula conica Schumacher, 1817 non Lamarck, 1801: synonym of Emarginula rosea Bell, 1824
- Emarginula dentigera Heilprin, 1889: synonym of Hemimarginula dentigera
- Emarginula elata Locard, 1898: synonym of Emarginula christiaensi Piani, 1985
- Emarginula elongata O. G. Costa, 1829: synonym of Emarginula octaviana Coen, 1939
- Emarginula eximia A. Adams, 1852: synonym of Emarginella eximia
- Emarginula flindersi Cotton, 1930: synonym of Emarginula convexa Hedley, 1907
- Emarginula fuliginea Kuroda, 1941: synonym of Variemarginula variegata
- Emarginula guernei Dautzenberg & Fischer, 1896: synonym of Emarginula tuberculosa Libassi, 1859
- Emarginula hedleyi Thiele, 1915: synonym of Emarginula candida A. Adams, 1852
- Emarginula incisula: synonym of Emarginella incisura
- Emarginula incisura A. Adams, 1852: synonym of Emarginella incisura
- Emarginula kimberti Cotton, 1930: synonym of Laeviemarginula kimberti
- Emarginula modesta H. Adams, 1872: synonym of Hemimarginula modesta
- Emarginula muelleri Forbes & Hanley, 1849: synonym of Emarginula fissura
- Emarginula ostheimerae Abbott, 1958: synonym of Octomarginula ostheimerae
- Emarginula panhi Quoy & Gaimard, 1834: synonym of Montfortista panhi
- Emarginula papillosa Risso 1826: synonym of Emarginula huzardii Payraudeau, 1826
- Emarginula parmophoidea Quoy & Gaimard, 1834: synonym of Tugali elegans Gray, 1843
- Emarginula peasei Thiele, 1915: synonym of Emarginula dilecta A. Adams, 1852
- Emarginula picta Dunker, 1860: synonym of Montfortula picta
- 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
- Emarginula polygonalis A. Adams, 1852: synonym of Hemitoma polygonalis
- Emarginula pulchreclathrata Tomlin, 1932: synonym of Emarginula agulhasensis Thiele, 1925
- Emarginula pumila A. Adams, 1852: synonym of Hemimarginula pumila
- Emarginula punctata A. Adams, 1852: synonym of Variemarginula punctata
- Emarginula reticulata Sowerby, 1813: synonym of Emarginula fissura
- 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
- 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, 1852
- Emarginula subemarginata Blainville, 1819: synonym of Montfortia subemarginata
- 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
- 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, 1903
- Emarginula variegata A. Adams, 1852: synonym of Variemarginula variegata