Species in the genus
Caecum include: • †
Caecum aartseni Van Dingenen, Ceulemans & Landau, 2016 •
Caecum achirona (de Folin, 1867) •
Caecum adamsi Raines, 2020 •
Caecum amputatum Ch. Hedley, 1894 •
Caecum amydroglyptum Rehder, 1980 •
Caecum angustum de Folin, 1879 •
Caecum annulatum Emmons, 1858 •
Caecum antillarum Carpenter, 1858 - Antillean caecum •
Caecum arabicum Issel, 1869 •
Caecum armoricum de Folin, 1869 - De Folin's lagoon snail. This species is fully protected in the United Kingdom under the
Wildlife and Countryside Act 1981 since 1992. •
Caecum atlantidis R. B. Watson, 1897 •
Caecum attenuatum de Folin, 1879 •
Caecum auriculatum de Folin, 1868 •
Caecum austrafricanum Vannozzi, Pizzini & Raines, 2015 •
Caecum australe Pizzini & Raines, 2011 •
Caecum bathus Pizzini, Raines & Vannozzi, 2013 • †
Caecum benhami Goedert & Raines, 2016 • †
Caecum bensoni Goedert & Raines, 2016 •
Caecum beaufortensis Ward and Blackwelder 1987 •
Caecum bimamillatum de Folin, 1867 •
Caecum bimarginatum Carpenter, 1859 •
Caecum biomaglo Vannozzi, 2023 •
Caecum bipartitum de Folin, 1870 •
Caecum borneoense de Folin, 1867 •
Caecum bounty Pizzini & Raines, 2011 •
Caecum brasilicum de Folin, 1874 •
Caecum brennani Raines & Pizzini, 2009 •
Caecum breve de Folin, 1867 •
Caecum bucerium Golikov, 1967 •
Caecum californicum Dall, 1885 - California caecum •
Caecum calvertense Martin, 1904 •
Caecum campanulatum Raines & Pizzini, 2005 •
Caecum campe Pilsbry and Olsson, 1941 •
Caecum carolinianum Dall, 1892 - Carolina caecum • †
Caecum carpenteri Deshayes, 1861 •
Caecum caverna Moolenbeek, Faber & Iliffe, 1989 •
Caecum chilense Stuardo, 1962 •
Caecum chinense de Folin, 1879 •
Caecum chipolanum Gardner, 1947 •
Caecum cinctum Olsson & Harbison, 1953 •
Caecum circumvolutum de Folin, 1867 •
Caecum clarkii P. P. Carpenter, 1858 •
Caecum clarum Lamy, 1910 [ex de Folin MS] •
Caecum clathratum P. P. Carpenter, 1857 •
Caecum clava de Folin, 1867 - club caecum •
Caecum cocoense Sibaja-Cordero, García-Méndez & Troncoso, 2013 •
Caecum codoceoae Gálvez & Huidobro, 2017 •
Caecum condylum Moore, 1969 - bone caecum •
Caecum continens Van der Linden & Moolenbeek, 2000 •
Caecum cooki Pizzini & Raines, 2011 •
Caecum cooperi S. I. Smith, 1860 - Cooper's Atlantic caecum •
Caecum corrugatulum Carpenter, 1857 •
Caecum crassum de Folin, 1870 •
Caecum crebricinctum Carpenter, 1864 - many-named caecum •
Caecum crispum A. E. Verrill &
Bush, 1900 •
Caecum crystallinum de Folin, 1880 •
Caecum cubitatum (de Folin, 1868) - smooth caecum •
Caecum cuspidatum Chaster, 1896 •
Caecum cycloferum de Folin, 1867 - fatlip caecum •
Caecum dakuwaqa Pizzini, Raines & Vannozzi, 2013 •
Caecum dalli Bartsch, 1920 •
Caecum danielei Pizzini & Raines, 2011 •
Caecum debile A. E. Verrill &
Bush, 1900 •
Caecum delicatulum A. E. Verrill &
Bush, 1900 •
Caecum derjugini Golikov, 1967 •
Caecum dextroversum P. P. Carpenter, 1858 •
Caecum digitulum Hedley, 1904 •
Caecum diminutum C. B. Adams, 1852 •
Caecum directum Vannozzi, 2019 •
Caecum donmoorei Mitchell-Tapping, 1979 •
Caecum draperi Raines, 2020 •
Caecum dux de Folin, 1871 •
Caecum eburneum C. B. Adams, 1852 •
Caecum egenum Vannozzi, 2017 •
Caecum elegantissimum Carpenter, 1859 •
Caecum eliezeri Absalao, 1997 •
Caecum elongatum P. P. Carpenter, 1857 •
Caecum engli Nofroni, Pizzini, Oliverio, 1997 •
Caecum eunoi Nofroni, Pizzini, Oliverio, 1997 •
Caecum exile de Folin, 1875 •
Caecum farcimen P. P. Carpenter, 1857 •
Caecum fijiense Pizzini, Raines & Vannozzi, 2013 •
Caecum firmatum C. B. Adams, 1852 •
Caecum floridanum Stimpson, 1851 - Florida caecum •
Caecum folini Kisch, 1959 •
Caecum frugi Vannozzi, 2019 •
Caecum galapagoense Raines, 2020 •
Caecum geigeri Pizzini & Raines, 2011 •
Caecum glabellum A. Adams, 1868 •
Caecum glabriforme Carpenter, 1857 •
Caecum glabrum (Montagu, 1803) •
Caecum gofasi Pizzini & Nofroni, 2001 •
Caecum granulatum Vannozzi, 2019 •
Caecum greensboroense Martin, 1904 •
Caecum gulosum Hedley, 1899 •
Caecum gurgulio Carpenter, 1858 - windpipe caecum •
Caecum hemphilli Bartsch, 1920 •
Caecum heptagonum (Bartsch, 1920) •
Caecum heterochromum Raines & Pizzini, 2005 •
Caecum hyalinum Vannozzi, 2022 •
Caecum imbricatum Carpenter, 1858 - imbricate caecum •
Caecum incisum Vannozzi, Pizzini & Raines, 2015 •
Caecum imperforatum Kanamacher, 1798 (
nomen dubium) •
Caecum inclinatum de Folin, 1869 •
Caecum infimum de Folin, 1867 •
Caecum inflatulum Vannozzi, 2017 •
Caecum inflatum de Folin, 1867 •
Caecum inhacaense Albano & Pizzini 2011 •
Caecum insculptum Carpenter, 1857 •
Caecum insularum Moore, 1969 •
Caecum intortum Vannozzi, Pizzini & Raines, 2015 •
Caecum invisibile Egger & Jörger, 2020 •
Caecum iricolor Vannozzi, 2023 •
Caecum japonicum (Habe, 1978) •
Caecum johnsoni Winkley, 1908 •
Caecum jonatani Espinosa, Ortea & Fernandez-Garcés, 2007 •
Caecum jonesae Swinnen & Simone, 2024 •
Caecum jucundum de Folin, 1867 •
Caecum knysnaense Vannozzi, Pizzini & Raines, 2015 •
Caecum kontiki Pizzini & Raines, 2011 •
Caecum laeve C.B. Adams, 1852 •
Caecum lapita Pizzini, Raines & Vannozzi, 2013 •
Caecum laqueatum C. B. Adams, 1852 • †
Caecum larieyense Lozouet, Lesport & Renard, 2001 •
Caecum leilae Vannozzi, Pizzini & Raines, 2015 •
Caecum lightfootanum Raines, 2020 •
Caecum limnetes Long, 1972 •
Caecum limpidum de Folin, 1874 •
Caecum lindae Vannozzi, Pizzini & Raines, 2015 •
Caecum lineicinctum de Folin, 1880 •
Caecum liratocinctum Carpenter, 1857 •
Caecum lohri Strong & Hertlein, 1939 •
Caecum loyaltense Pizzini, Raines & Vannozzi, 2013 •
Caecum lozoueti Vannozzi & Renda, 2024 •
Caecum lucidum de Folin, 1867 •
Caecum macrum Van der Linden & Moolenbeek, 2000 •
Caecum maestratii Pizzini, Raines & Vannozzi, 2013 •
Caecum magellanicum di Geronimo, Privitera & Valdovinos, 1995 •
Caecum malleatum de Folin, 1867 • †
Caecum mammillatum S. V. Wood, 1848 •
Caecum maori Pizzini & Raines, 2006 •
Caecum maraisi Vannozzi, Pizzini & Raines, 2015 •
Caecum marginatum de Folin, 1869 •
Caecum marmoratum de Folin, 1869 •
Caecum massambabense Absalao, 1994 •
Caecum mauritianum de Folin, 1867 •
Caecum metamorphosicum S. Lima, Santos & Absalão, 2013 •
Caecum microannulatum Vannozzi & Renda, 2024 •
Caecum microstriatum Pizzini, Raines & Vannozzi, 2013 •
Caecum miliarium Vannozzi & Renda, 2024 • †
Caecum mineuri Lozouet, 1999 •
Caecum mirificum de Folin, 1867 •
Caecum modestum de Folin, 1867 •
Caecum monstrosum C. B. Adams, 1852 •
Caecum moorei (Marincovich, 1973) •
Caecum morgan Vannozzi, Pizzini & Raines, 2015 •
Caecum multicostatum de Folin, 1867 •
Caecum musorstomi Pizzini, Raines & Vannozzi, 2013 •
Caecum nasutum Vannozzi, 2019 • †
Caecum nemoralis Lozouet, 2015 •
Caecum neocaledonicum de Folin, 1867 •
Caecum neoguineanum Vannozzi, 2019 •
Caecum nofronii Vannozzi, 2019 •
Caecum oahuense H. A. Pilsbry, 1921 •
Caecum obtusum Carpenter, 1857 •
Caecum occidentale (Bartsch, 1920) - western caecum •
Caecum orcutti (
Dall, 1885) •
Caecum paradoxum de Folin, 1867 •
Caecum parvum C. B. Adams, 1852 •
Caecum pascuanum Raines & Pizzini, 2005 • †
Caecum pertenuis Laws, 1941 •
Caecum planum de Folin, 1874 •
Caecum patuxentium Martin, 1904 •
Caecum plicatum Carpenter, 1858 - plicate caecum •
Caecum pollicare Carpenter, 1859 •
Caecum praegrande Vannozzi, 2017 •
Caecum profundicolum Bartsch, 1920 - deepwater caecum •
Caecum properegulare Mansfield, 1925 •
Caecum pulchellum Stimpson, 1851 - beautiful caecum •
Caecum pygmaeum C. B. Adams, 1852 •
Caecum quadratum P. P. Carpenter, 1857 •
Caecum rapanuiense Raines & Pizzini, 2005 •
Caecum regulare Carpenter, 1858 •
Caecum rehderi Raines & Pizzini, 2005 •
Caecum restrictum Vannozzi & Renda, 2024 •
Caecum reversum Carpenter, 1857 •
Caecum richthofeni A. M. Strong & J. G. Hertlein, 1939 •
Caecum rijgersmai Jong & Coomans, 1988 • †
Caecum roederi Raines, C. L. Powell & LaFollette, 2023 •
Caecum rolani Pizzini & Nofroni, 2001 •
Caecum rosanum Bartsch, 1920 •
Caecum rostratum de Folin, 1881 •
Caecum ruggerii Pizzini, 1997 •
Caecum rugulosum Phil, 1836 •
Caecum ryssotitum de Folin, 1867 - minute caecum •
Caecum searleswoodii Carpenter, 1859 •
Caecum semilaeve Carpenter, 1857 •
Caecum senegambianum de Folin, 1870 •
Caecum sepimentum de Folin, 1868 •
Caecum shaskyi Raines, 2020 •
Caecum simplicissimum Thiele, 1925 •
Caecum sinuatum de Folin, 1867 •
Caecum skoglundae Pizzini, Raines & Nofroni, 2007 •
Caecum smriglioi Pizzini, Nofroni & Bonfitto, 2008 •
Caecum someri (de Folin, 1867) •
Caecum spiculum Raines, 2020 •
Caecum striatum de Folin, 1875 •
Caecum strictum de Folin, 1871 •
Caecum strigosum de Folin, 1868 •
Caecum subannulatum de Folin, 1870 •
Caecum subaustrale Stuardo, 1970 •
Caecum subconicum Carpenter, 1857 •
Caecum subcylindratum Pizzini, Raines & Vannozzi, 2013 •
Caecum subflavum de Folin, 1879 •
Caecum subimpressum P. P. Carpenter, 1857 •
Caecum subobsoletum Carpenter, 1857 •
Caecum subornatum de Folin, 1874 •
Caecum subspirale Carpenter, 1857 •
Caecum subquadratum Carpenter, 1859 •
Caecum subspirale Carpenter, 1857 •
Caecum subvolutum de Folin, 1874 •
Caecum succineum de Folin, 1879 •
Caecum swinneni Nofroni, Pizzini, Oliverio, 1997 •
Caecum taeniatum de Folin, 1869 •
Caecum tahitianum Pizzini & Raines, 2011 •
Caecum temporale Vannozzi & Renda, 2024 •
Caecum tenue Verrill & Bush, 1900 •
Caecum tenuicostatum de Folin, 1881 •
Caecum tenuiliratum Carpenter, 1857 • †
Caecum tenuistriatum O. Boettger, 1869 •
Caecum teres Carpenter, 1857 •
Caecum textile de Folin, 1867 - textile caecum •
Caecum tornatum A. E. Verrill &
Bush, 1900 •
Caecum torquetum de Folin, 1867 •
Caecum tortile Dall, 1892 - twisted caecum •
Caecum trachea G. Montagu, 1803 •
Caecum trindadense S. Lima, Santos & Absalão, 2013 •
Caecum troglodyta Moolenbeek, Faber & Iliffe, 1989 • †
Caecum tumidum Carpenter, 1858 •
Caecum uncinatum de Folin, 1867 •
Caecum undatum P. P. Carpenter, 1857 •
Caecum vanuatuarum Pizzini, Raines & Vannozzi, 2013 •
Caecum varanoi Pizzini, Nofroni & Bonfitto, 2008 •
Caecum variegatum de Folin, 1867 •
Caecum venosum de Folin, 1867 • †
Caecum verai Moreno, Peñas & Rolán, 2003 •
Caecum vertebrale Ch. Hedley, 1899 •
Caecum vicinum de Folin, 1870 •
Caecum virginiae Pizzini, Raines & Vannozzi, 2013 •
Caecum vitreum P. P. Carpenter, 1858 •
Caecum wakense Raines & Vannozzi, 2024 •
Caecum wami Raines & Pizzini, 2009 •
Caecum wayae Pizzini & Nofroni, 2001 •
Caecum zaagmani Jong and Coomans, 1988 ; Subgenera brought into synonymy : •
Caecum (Defolinia) Weisbord, 1962: synonym of
Caecum Fleming, 1813 •
Caecum (Meioceras) Carpenter, 1859: synonym of
Meioceras Carpenter, 1859 ;Species brought into synonymy: •
Caecum abnormale Carpenter, 1857: synonym of
Caecum subspirale Carpenter, 1857 •
Caecum amaltheanum Hedley, 1899: synonym of
Mauroceras legumen (Hedley, 1899) •
Caecum amamiense Habe, 1978: synonym of
Mauroceras amamiense (Habe, 1978) •
Caecum arcuatum de Folin, 1867 : synonym of
Caecum sepimentum de Folin, 1868 •
Caecum bahiahondaense A. M. Strong & J. G. Hertlein, 1939 : synonym of
Caecum clathratum Carpenter, 1857 •
Caecum bakeri (
Bartsch, 1920): synonym of
Caecum dextroversum Carpenter, 1857 •
Caecum berthae Lange de Morretes, 1954: synonym of
Caecum plicatum Carpenter, 1858 •
Caecum biminicola Pilsbry, 1951: synonym of
Caecum plicatum Carpenter, 1858 •
Caecum buccina de Folin, 1870: synonym of
Caecum circumvolutum de Folin, 1867 •
Caecum bucheri Parenzan, 1979: synonym of
Filogranula annulata (O. G. Costa, 1861) •
Caecum butoti Jong & Coomans, 1988 : synonym of
Caecum marmoratum de Folin, 1869 •
Caecum capitanum de Folin, 1874: synonym of
Caecum pulchellum Stimpson, 1851 •
Caecum carmenense de Folin, 1870: synonym of
Caecum circumvolutum de Folin, 1867 •
Caecum carpenteri (Bartsch, 1920): synonym of
Caecum adamsi Raines, 2020 •
Caecum cayoense Rehder, 1943: synonym of
Caecum floridanum Stimpson, 1851 •
Caecum clenchi Olsson & McGinty, 1958: synonym of
Caecum cycloferum de Folin, 1867 •
Caecum compactum P. P. Carpenter, 1857 : synonym of
Caecum quadratum Carpenter, 1857 •
Caecum conjunctum de Folin, 1867: synonym of
Caecum pulchellum Stimpson, 1851 •
Caecum contractum de Folin, 1870: synonym of
Caecum bipartitum de Folin, 1870 •
Caecum corneum R. W. Dunker, 1875 : synonym of
Caecum ryssotitum de Folin, 1867 •
Caecum cornucopiae (
Carpenter, 1858) - horn-of-plenty caecum : synonym of
Meioceras cornucopiae Carpenter, 1859 •
Caecum coronatum de Folin, 1867: synonym of
Caecum imbricatum Carpenter, 1858 •
Caecum coronellum Dall, 1892: synonym of
Caecum cycloferum de Folin, 1867 •
Caecum costatum A. E. Verrill, 1872: synonym of
Caecum cooperi S. I. Smith, 1860 •
Caecum crassicostum Gabb, 1881: synonym of
Caecum floridanum Stimpson, 1851 •
Caecum curtatum de Folin, 1867: synonym of
Caecum pulchellum Stimpson, 1851 •
Caecum decussatum de Folin, 1869: synonym of
Caecum plicatum Carpenter, 1858 •
Caecum dux de Folin, 1871: synonym of
Caecum floridanum Stimpson, 1851 •
Caecum eburneum de Folin, 1886: synonym of
Caecum folini Kisch, 1959 •
Caecum elagans Deregaslavtseva, 1891: synonym of
Caecum trachea (Montagu, 1803) •
Caecum elegans Perejoslavitseva, 1831 : synonym of
Caecum trachea (Montagu, 1803) •
Caecum fasciatum de Folin, 1876: synonym of
Caecum trachea (Montagu, 1803) •
Caecum formulosum de Folin, 1869: synonym of
Caecum imbricatum Carpenter, 1858 •
Caecum fulvum Kisch, 1959: synonym of
Caecum neocaledonicum de Folin, 1867 •
Caecum heladum Olsson and Harbison, 1953 - fine-line caecum : synonym of
Caecum multicostatum de Folin, 1867 •
Caecum heterapex T. Habe, 1963 : synonym of
Caecum clarum Lamy, 1910 •
Caecum hinoidei T. Habe, 1978 : synonym of
Caecum neocaledonicum de Folin, 1867 •
Caecum insigne de Folin, 1867: synonym of
Caecum imbricatum Carpenter, 1858 •
Caecum instructum de Folin, 1870: synonym of
Caecum bipartitum de Folin, 1870 •
Caecum irregulare de Folin, 1867: synonym of
Caecum floridanum Stimpson, 1851 •
Caecum legumen Hedley, 1904: synonym of
Meioceras legumen (Hedley, 1904) •
Caecum leptoglyphos de Folin, 1881: synonym of
Caecum textile de Folin, 1867 •
Caecum lermondi Dall, 1924: synonym of
Meioceras nitidum (
Stimpson, 1851) •
Caecum lightfootae Pizzini, Nofroni, Oliverio, 1994 : synonym of
Caecum atlantidis Watson, 1897 •
Caecum lilianum Ch. Hedley, 1903 : synonym of
Caecum sepimentum de Folin, 1867 •
Caecum maculatum T. Habe, 1963 : synonym of
Caecum sepimentum de Folin, 1867 •
Caecum malleatum var.
sublaevis de Folin, 1868: synonym of
Caecum modestum de Folin, 1868 •
Caecum microcyclus de Folin, 1879 : synonym of
Caecum attenuatum de Folin, 1880 (subsequent spelling) •
Caecum nitidum Stimpson, 1851 - little horn caecum: synonym of
Meioceras nitidum (
Stimpson, 1851) •
Caecum obesum A. E. Verrill &
Bush, 1900 : synonym of
Caecum plicatum Carpenter, 1858 •
Caecum orientale de Folin, 1868 : synonym of
Caecum clarkii Carpenter, 1859 •
Caecum phronimum de Folin, 1867 : synonym of
Caecum floridanum Stimpson, 1851 •
Caecum puntagordanum Weisbord, 1962: synonym of
Caecum floridanum Stimpson, 1851 •
Caecum putnamense Mansfield, 1924 : synonym of
Caecum johnsoni Winkley, 1908 •
Caecum rotundum de Folin, 1868 : synonym of
Meioceras nitidum (
Stimpson, 1851) •
Caecum saavedrae Beltran, 1965 : synonym of
Caecum auriculatum de Folin, 1868 •
Caecum sardinianum de Folin, 1869 : synonym of
Caecum clarkii Carpenter, 1859 •
Caecum sculptum de Folin, 1881: synonym of
Caecum imbricatum Carpenter, 1858 •
Caecum semitracheum S. Brusina, 1865 : synonym of
Caecum clarkii Carpenter, 1859 •
Caecum smithi Cooper, 1872: synonym of Caecum cooperi S. Smith, 1860 •
Caecum solitarium Oliver, 1915 : synonym of
Caecum maori Pizzini & Raines, 2006 •
Caecum syriacum de Folin, 1869: synonym of
Caecum auriculatum de Folin, 1868 •
Caecum tenue A. E. Verrill &
Bush, 1900: synonym of
Caecum armoricum de Folin, 1869 •
Caecum termes Heilprin, 1889: synonym of
Caecum plicatum Carpenter, 1858 •
Caecum tomaculum (Weisbord, 1962) : synonym of
Caecum ryssotitum de Folin, 1867 •
Caecum triornatum de Folin, 1870: synonym of
Caecum bipartitum de Folin, 1870 •
Caecum uvea Pizzini, Raines & Vannozzi, 2013: synonym of
Caecum folini Kisch, 1959 •
Caecum veracruzanum Collins, 1937 : synonym of
Caecum circumvolutum de Folin, 1867 •
Caecum vestitum de Folin, 1868 - Vera Cruz caecum: synonym of
Caecum circumvolutum de Folin, 1867 ;
Nomina dubia : •
Caecum abreviatum de Folin, 1870 •
Caecum achates Sykes, 1925: taxon inquirendum •
Caecum bicinctum de Folin, 1870 •
Caecum gracile Carpenter, 1858 •
Caecum hemisphericum de Folin, 1867 •
Caecum imperforatum (Kanmacher, 1798) ==References==