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 [George Brettingham George Brettingham Sowerby III|Sowerby II|Sowerby] in [Arthur Arthur Adams (zoologist)|Adams (zoologist)|Adams] & Sowerby, 1863Emarginula adriatica Costa O.G., 1829Emarginula agulhasensis [Johannes Johannes Thiele (zoologist)|Thiele (zoologist)|Thiele], 1925Emarginula alba Watson, 1897Emarginula amyda Shikama, 1962Emarginula angusta McLean, 1970Emarginula annielangleitae Poppe & Tagaro, 2020Emarginula apolonia Pacaud, 2015

† Emarginula auversiensis Deshayes, 1861 Emarginula bajula Hedley, 1913Emarginula balicasagensis Poppe & Tagaro, 2020Emarginula bellula A. Adams, 1852Emarginula bicancellata Montrouzier, 1860Emarginula bonfittoi Smriglio & Mariottini, 2001Emarginula boucheti Poppe & Tagaro, 2020
† Emarginula brebioni Ceulemans, Van Dingenen & Landau, 2016 Emarginula camilla Melvill & Standen, 1903Emarginula candida Adams, 1852Emarginula capuloidea G. Nevill & H. Nevill, 1869
† Emarginula carezi de Laubrière, 1881 Emarginula choristes Dall, 1925Emarginula christiaensi Piani, 1985Emarginula circumalbum Poppe & Tagaro, 2020
† Emarginula clathrata Deshayes, 1824
† Emarginula clathrataeformis Eichwald, 1830 Emarginula colipanoae Poppe & Tagaro, 2020Emarginula compta Habe, 1953Emarginula concinna Adams, 1852Emarginula connectens Thiele, 1915Emarginula connelli Kilburn, 1978Emarginula convexa Hedley, 1907
† Emarginula costata Lamarck, 1803 Emarginula costulata Deshayes, 1863Emarginula crassa Sowerby, 1812Emarginula crassicostata Sowerby in Adams & Sowerby, 1863Emarginula cucullata A. Adams, 1852Emarginula curvamen Iredale, 1925Emarginula curvata Schepman, 1908
Emarginula cuvieri Audouin, 1827
Emarginula decorata Deshayes, 1863
† Emarginula delicatissima Chapman & Gabriel, 1923 Emarginula delonguevilleae Poppe & Tagaro, 2020
† Emarginula dennanti Chapman & Gabriel, 1923 Emarginula devota Thiele, 1915Emarginula dictya McLean, 1970
† Emarginula didactica Ludbrook, 1956
† Emarginula dilatoria Ludbrook, 1956 Emarginula dilecta Adams, 1852Emarginula divae Emarginula dubia Schepman, 1908 Emarginula dujardini Dollfus & Dautzenberg, 1886 †
† Emarginula espibosensis Lozouet, 1999
† Emarginula exigua Trautschold, 1866 Emarginula fenestrella Deshayes, 1863Emarginula fissura - slit limpet
† Emarginula fossorensis Lozouet, 1999 Emarginula foveolata Schepman, 1908
* Emarginula foveolata fugitai Habe, 1953
† Emarginula foveolata Gerasimov, 1955 Emarginula fragilis Yokoyama, 1920Emarginula fuliginea Adams, 1851Emarginula gabensis Emarginula galericulata A. Adams, 1852
† Emarginula galeriformis Marwick, 1928
† Emarginula gigantea Poppe, 2008
†Emarginula guerangeri A. d'Orbigny, 1843 Emarginula gustavi Poppe & Tagaro, 2020Emarginula hataii Habe, 1953Emarginula hawaiiensis Dall, 1895
† Emarginula haweraensis Powell, 1931 Emarginula hosoyai Habe, 1953Emarginula huzardii Emarginula icosisculpta Simone & Cunha, 2014 Emarginula imaizumi Dall, 1926Emarginula imella Dall, 1926Emarginula janae Cossignani, 2020Emarginula japonica Sowerby in Adams & Sowerby, 1863Emarginula jungcheni K.-Y. Lai, 2019
† Emarginula kaiparica Laws, 1939
† Emarginula kaiwarensis Bandel, Gründel & P. A. Maxwell, 2000 †
† Emarginula karuna Das, Bardhan & Lahiri, 1999 Emarginula kashimaensis Shikama, 1962
† Emarginula komitica Laws, 1939 Emarginula koon Kilburn, 1978
† Emarginula ladowae Eichman, 1955 Emarginula lata J.R.C. Quoy & J.P. Gaimard, 1834 Emarginula lentiginosa D. G. Herbert, 2024Emarginula liuzzii Poppe & Tagaro, 2020Emarginula longifissa Sowerby, 1866Emarginula lorenzoi Giusti & Micali, 2019Emarginula macclurgi Kilburn, 1978Emarginula mactanensis Poppe & Tagaro, 2020Emarginula maculata Adams in Adams & Sowerby, 1863Emarginula margarita Poppe & Tagaro, 2020
† Emarginula mariae Cossmann, 1888
† Emarginula maudensis Chapman & Gabriel, 1923 Emarginula micans Adams, 1852Emarginula montrouzieri Souverbie, 1872Emarginula multisquamosa Schepman, 1908Emarginula multistriata Jeffreys, 1882Emarginula natalensis Barnard, 1963Emarginula nodulicostata D. G. Herbert, 2024Emarginula nordica Pérez Farfante, 1947 - northern emarginula
† Emarginula oblonga Sandberger, 1859 Emarginula obovata Adams, 1852Emarginula octaviana Coen, 1939Emarginula oppressa Barnard, 1963Emarginula paivana Emarginula papilionacea G. Nevill & H. Nevill, 1869Emarginula patula Cotton, 1930
† Emarginula paucicostata Laws, 1936 Emarginula paucipunctata Schepman, 1908
† Emarginula pelagica Passy, 1832 Emarginula philippinensis Poppe & Tagaro, 2020Emarginula phrixodes Dall, 1927 - ruffled emarginulaEmarginula pittensis Marwick, 1928 Emarginula poppeorum Romani & Crocetta, 2017
† Emarginula praesicula Lozouet, 1999 Emarginula puncticulata Adams, 1852Emarginula punctulum Piani, 1980
† Emarginula punctura S. Wood, 1848 Emarginula pustula Thiele in Küster, 1913Emarginula quadrata Poppe & Tagaro, 2020
† Emarginula radiocostata Kiel & Bandel, 2000 Emarginula regia Habe, 1953Emarginula retecosa Adams, 1851Emarginula retrogyra D. G. Herbert, 2024Emarginula rollandi P. Fischer, 1857 Emarginula rosea Bell, 1824Emarginula salebrosa D. G. Herbert, 2024
† Emarginula sanctaecaatharine Passy, 1832 Emarginula scabricostata A. Adams, 1852Emarginula scabriuscula Adams, 1852Emarginula sicula Gray, 1825 - dagger emarginulaEmarginula sinica Lu, 1986Emarginula solidula Costa, 1829Emarginula souverbiana Pilsbry, 1890
Emarginula spinosa Deshayes, 1863
† Emarginula squammata Grateloup, 1836
† Emarginula striatissima Traub, 1979 Emarginula striatula Quoy and Gaimard, 1834 - dagger emarginula Emarginula sublaevis Schepman, 1908Emarginula subtilitexta Verco, 1908Emarginula superba Hedley, 1906Emarginula suspira Simone & Cunha, 2014 Emarginula tenera Locard, 1892
† Emarginula teneraeformis Lozouet, 1999Emarginula tenuicostata Sowerby, 1863Emarginula teramachii Habe, 1953Emarginula textilis Gould, 1859 in 1859-61Emarginula thomasi Crosse, 1864Emarginula thorektes Kilburn, 1978Emarginula tosaensis Habe, 1953
†Emarginula transenna Tenison Woods, 1877 Emarginula tuberculosa Libassi, 1859 - tuberculate emarginulaEmarginula undulata Melvill & Standen, 1903Emarginula velascoensis Shasky, 1961Emarginula velascoi Rehder, 1980Emarginula viridibrunneis Poppe & Tagaro, 2020Emarginula viridicana Herbert & Kilburn, 1985Emarginula viridis Poppe & Tagaro, 2020
† Emarginula wannonensis G. F. Harris, 1897
† Emarginula washingtoniana Squires & Goedert, 1994 Emarginula xishaensis Lu, 1986Emarginula yangeorum Poppe & Tagaro, 2020

Synonyms

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 A. Adams, 1852Emarginula 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, 1852Emarginula conica Lamarck, 1801: synonym of Emarginula fissura Emarginula conica Schumacher, 1817 non Lamarck, 1801: synonym of Emarginula rosea Bell, 1824Emarginula dentigera Heilprin, 1889: synonym of Hemimarginula dentigera Emarginula elata Locard, 1898: synonym of Emarginula christiaensi Piani, 1985Emarginula elongata O. G. Costa, 1829: synonym of Emarginula octaviana Coen, 1939Emarginula eximia A. Adams, 1852: synonym of Emarginella eximia 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: 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, 1826Emarginula parmophoidea Quoy & Gaimard, 1834: synonym of Tugali elegans Gray, 1843Emarginula peasei Thiele, 1915: synonym of Emarginula dilecta A. Adams, 1852Emarginula phrygium Herbert & Kilburn, 1985: synonym of Agariste phrygium 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, 1925Emarginula 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, 1852Emarginula 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, 1903Emarginula variegata A. Adams, 1852: synonym of ''Variemarginula variegata''