Odostomia is the most speciose genus of minute sea snails, pyramidellid gastropod mollusks. This genus is placed in the family Pyramidellidae in the subfamily Odostomiinae. There are several hundred species in this diverse genus (Schander et al. 1999) Bouchet, P.; Gofas, S. (2011). Odostomia Fleming, 1813. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=138413 on 3 June 2012Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180-213Spencer, H.; Marshall. B. (2009). All Mollusca except Opisthobranchia. In: Gordon, D. (Ed.) (2009). New Zealand Inventory of Biodiversity. Volume One: Kingdom Animalia. 584 pp

Most of the description of species in the genus Odostomia was carried out by Dall & Bartsch in 1909.Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, 1909 Many of the described species are however suspected of being synonyms, or are proven synonyms.

The genus Odostomia Fleming, 1813 was used by 19th century authors, particularly in the European literature, for most of the smaller Pyramidellidae. It is still a catchall for most small pyramidellids lacking both axial and spiral sculpture. Some authors, e.g. Høisæter (2014), Peñas, Rolán & Swinnen (2014) and Giannuzzi-Savelli et al. (2014) who are here followed have attempted to redistribute some of the species, but there are still many species remaining unduly under Odostomia. For these, the database WoRMS has refrained from making new combinations not backed by (or implicit from) a published source but, unless otherwise noted, the species that were already "accepted" under a subgenus now raised to full genus have been marked as "accepted" under that full genus.

The European and American species of Odostomia differ in several anatomical and shell characteristics. They are therefore likely to be assigned to different genera.National Audubon Society (1996), Field Guide to North American Seashells,

Species Species within the genus Odostomia include:

A

Odostomia aartseni Nofroni, 1988 Odostomia achatinella A. Adams, 1860 Odostomia acrybia Dall & Bartsch, 1909 Odostomia acuta Jeffreys, 1848 Odostomia acutangula Suter, 1908 Odostomia acutidens Dall, 1884 Odostomia aepynota Dall & Bartsch, 1909 Odostomia aequisculpta Carpenter, 1864 Odostomia aethra Bartsch, 1915 Odostomia albuquerqueae Peñas, Rolán & Swinnen, 2014 Odostomia aleutica Dall & Bartsch, 1909 Odostomia alia Peñas & Rolán, 1999 Odostomia aliquanta Penas & Rolan, 1999 Odostomia altina Dall & Bartsch, 1909 Odostomia amanda Garrett, 1863 † Odostomia amava T. Oldroyd, 1925 Odostomia americana Dall & Bartsch, 1904 Odostomia amianta Dall & Bartsch, 1907 Odostomia amilda Dall & Bartsch, 1909 Odostomia anabathmis Melvill, 1910 † Odostomia ancisa (Marwick, 1931) Odostomia andamanensis (Preston, 1908) Odostomia angularis Dall & Bartsch, 1907 Odostomia antelia Melvill, 1896 Odostomia anxia Hedley, 1909 Odostomia aomori Nomura, 1938 Odostomia apexdemissus Peñas, Rolán & Swinnen, 2014 Odostomia armata Carpenter, 1857 † Odostomia arowhana (Marwick, 1931) Odostomia aspera Nomura, 1938 Odostomia astricta Dall & Bartsch, 1907 Odostomia ata Bartsch, 1926 Odostomia atossa Dall, 1908 Odostomia aucklandica Laws, 1939 Odostomia audax Baker, Hanna & Strong, 1928 Odostomia avellana Carpenter, 1864 † Odostomia awatumida Laws, 1939 Odostomia ayukawaensis Nomura, 1938 Odostomia azteca Strong & Hertlein, 1939

B

Odostomia babylonica Winckworth, 1940 Odostomia bachia Bartsch, 1927 Odostomia baldridgeae Bartsch, 1912 Odostomia bapaulinoae Peñas, Rolán & Swinnen, 2019 Odostomia baranoffensis Dall & Bartsch, 1909 Odostomia barkleyensis Dall & Bartsch, 191 Odostomia barnardi van Aartsen & Corgan, 1996 † Odostomia bartrumi Laws, 1940 Odostomia becki W.H. Turton, 1933 Odostomia bentenzimana Nomura, 1937 Odostomia benthina Dall & Bartsch, 1909 Odostomia beringi Dall, 1871 Odostomia bernardi (van Aartsen, Gittenberger & Goud, 1998) † Odostomia biangulata Laws, 1939 Odostomia biformis Saurin, 1962 Odostomia bismichaelis Sacco, 1892 Odostomia bissagosensis Peñas, Rolán & Swinnen, 2014 Odostomia boermani van Aartsen, Gittenberger E. & Goud, 1998 Odostomia brandhorsti van Aartsen, Gittenberger & Goud, 1998 Odostomia bruneri A. E. Verrill, 1882 Odostomia bulbula Hedley, 1907 Odostomia bulimulus Monterosato, 1874 Odostomia bullata Nomura, 1937 Odostomia bullula Gould, 1861 Odostomia buzzurroi Peñas & Rolán, 1999

C

Odostomia calcarella Bartsch, 1912 Odostomia californica Dall & Bartsch, 1909 Odostomia callimene Bartsch, 1912 Odostomia callimorpha Dall & Bartsch, 1909 Odostomia calliope Bartsch, 1912 Odostomia callipyrga Dall & Bartsch, 1904 Odostomia cana A. Adams, 1860 Odostomia canfieldi Dall, 1908 Odostomia capa Bartsch, 1926 Odostomia capensis Thiele, 1925 Odostomia capitana Dall & Bartsch, 1909 Odostomia carinata H. Adams, 1873 Odostomia cassandra Bartsch, 1912 Odostomia castanea Habe, 1961 † Odostomia castlecliffensis Laws, 1939 Odostomia catalinensis Bartsch, 1927 Odostomia chamorum Saurin, 1958 Odostomia chariclea Melvill, 1910 † Odostomia chattonensis Laws, 1939 Odostomia chinooki Bartsch, 1927 Odostomia chitonicola E. A. Smith, 1899 Odostomia chordata Suter, 1908 Odostomia churchi Smith & Gordon, 1948 Odostomia ciguatonis Strong, 1949 Odostomia cincta de Folin, 1879 Odostomia cionelloides Clessin, 1902 Odostomia circumcordata Peñas, Rolán & Swinnen, 2014 Odostomia citrina de Folin, 1869 † Odostomia civitella T. Oldroyd, 1925 Odostomia clara Brazier, 1877 Odostomia clathratula (C.B. Adams, 1852) Odostomia clausiliformis Carpenter, 1857 Odostomia clavulina Fischer P., 1877 Odostomia clementensis Bartsch, 1927 Odostomia clementina Dall & Bartsch, 1909 Odostomia clessini Dall & Bartsch, 1909 Odostomia collea Bartsch, 1926 Odostomia columbiana Dall & Bartsch, 1907 Odostomia communis (C.B. Adams, 1852) Odostomia conspicua Alder, 1850 Odostomia contabulata (Mörch, 1860) Odostomia contrerasi Baker, Hanna & Strong, 1928 Odostomia cookeana Bartsch, 1910 Odostomia corimbensis Schander, 1994 Odostomia corintoensis Hertlein & Strong, 1951 Odostomia coronadoensis Dall & Bartsch, 1909 Odostomia corpulentoides Dell, 1956 Odostomia costaricensis Hertlein & Strong, 1951 Odostomia crassicollosa Nomura, 1937 Odostomia crassiplicata Nomura, 1936 Odostomia crispa (G. B. Sowerby III, 1892) Odostomia cryptodon Suter, 1908 Odostomia crystallina Garrett, 1873 Odostomia culta Dall & Bartsch, 1906 Odostomia cumshewaensis Bartsch, 1921 Odostomia cuspidata Garrett, 1873 Odostomia cypria Dall & Bartsch, 1912

D-E

Odostomia dalsumi van Aartsen, Gittenberger & Goud, 1998 Odostomia daruma Nomura, 1938 Odostomia dealbata (Stimpson, 1851) Odostomia deceptrix Dall & Bartsch, 1909 Odostomia decouxi Saurin, 1959 Odostomia defolinia Dall & Bartsch, 1909 Odostomia delicatula Carpenter, 1864 Odostomia deliciosa Dall & Bartsch, 1907 Odostomia deplexa (Tate & May, 1900) Odostomia desimana Dall & Bartsch, 1904 Odostomia desuefacta Penas & Rolan, 1999 Odostomia dicella Bartsch, 1912 Odostomia didyma (Verrill & Bush, 1900) Odostomia digitulus Penas & Rolan, 1999 Odostomia dijkhuizeni van Aartsen, Gittenberger E. & Goud, 1998 Odostomia dilecta Nomura, 1937 Odostomia dinella Dall & Bartsch, 1909 Odostomia disparilis A. E. Verrill, 1884 Odostomia donilla Dall & Bartsch, 1909 Odostomia dorica Melvill, 1904 Odostomia dotella Dall & Bartsch, 1909 Odostomia dusiensis Nomura, 1937 Odostomia duureni (van Aartsen, Gittenberger & Goud, 1998) Odostomia dyma van Aartsen & Corgan, 1996 Odostomia eburnea Angas, 1878 Odostomia edmondi Jordan, 1920 Odostomia effusa Carpenter, 1857 Odostomia elata A. Adams, 1860 Odostomia eldorana Bartsch, 1912 Odostomia electa Jeffreys, 1883 Odostomia elsa Dall & Bartsch, 1909 Odostomia engbergi Bartsch, 1920 Odostomia enora Dall & Bartsch, 1909 Odostomia enosimensis Nomura, 1938 Odostomia era Bartsch, 1927 Odostomia eremita Peñas & Rolán, 1999 Odostomia eronea Nomura, 1937 Odostomia eruca Laseron, 1959 Odostomia esilda Dall & Bartsch, 1909 Odostomia eugena Dall & Bartsch, 1909 Odostomia euglypta Jordan, 1920 Odostomia exara Dall & Bartsch, 1907 Odostomia exarata Carpenter, 1857 Odostomia excelsa Dall & Bartsch, 1909 Odostomia excisa Bartsch, 1912 Odostomia exiguita Nomura, 1937 Odostomia exilis Garrett, 1873 Odostomia exiliter Peñas, Rolán & Swinnen, 2014 Odostomia extenuata Penas & Rolan, 1999 Odostomia eyerdami Bartsch, 1927

F-G

Odostomia farallonensis Dall & Bartsch, 1909 Odostomia farma Dall & Bartsch, 1909 Odostomia fasciata Carpenter, 1857 Odostomia fehrae (van Aartsen, Gittenberger & Goud, 1998) Odostomia fetella Dall & Bartsch, 1909 Odostomia fia Bartsch, 1927 Odostomia franciscana Bartsch, 1917 Odostomia francoi Penas & Rolan, 1999 Odostomia franki Peñas & Rolán, 1999 Odostomia fujitanii Yokoyama, 1927 Odostomia funiculustriata Penas & Rolan, 1999 Odostomia gabrielensis Baker, Hanna & Strong, 1928 Odostomia galapagensis Dall & Bartsch, 1909 Odostomia gallegosiana Hertlein & Strong, 1951 Odostomia garcerii Saurin, 1959 Odostomia geoffreyi Laws, 1939 Odostomia gittenbergeri van Aartsen & Corgan, 1996 Odostomia glabra Clessin, 1902 Odostomia glaphyra E. A. Smith, 1890 Odostomia gloriosa Bartsch, 1912 Odostomia gomezi Peñas, Rolán & Swinnen, 2014 Odostomia goniostoma A. Adams, 1860 † Odostomia gorensis Laws, 1939 Odostomia gouldii Carpenter, 1864 Odostomia gracilientis (Keep, 1887) Odostomia gradusuturae Penas & Rolan, 1999 Odostomia grammatospira Dall & Bartsch, 1903 Odostomia granadensis Dall & Bartsch, 1909 † Odostomia graviapicalis Laws, 1939 Odostomia gravida Gould, 1853 Odostomia grijalvae Baker, Hanna & Strong, 1928 Odostomia grippiana Bartsch, 1912 Odostomia guatulcoensis Hertlein & Strong, 1951 Odostomia gulicki Pilsbry, 1918

H-J

Odostomia hagemeisteri Dall & Bartsch, 1909 Odostomia harfordensis Dall & Bartsch, 1907 Odostomia harukoae Nomura, 1938 Odostomia harveyi van Aartsen & S.M. Smith, 1996 Odostomia haurakiensis Laws, 1939 Odostomia heathi Smith & Gordon, 1948 Odostomia helena Bartsch, 1912 Odostomia helga Dall & Bartsch, 1909 Odostomia hemphilli Dall & Bartsch, 1909 Odostomia hendersoni Bartsch, 1909 Odostomia herilda Dall & Bartsch, 1909 Odostomia herrerae Baker, Hanna & Strong, 1928 Odostomia hertleini Strong, 1938 Odostomia heterocincta Bartsch, 1912 Odostomia hierroensis Peñas & Rolán, 1999 Odostomia hilgendorfi Clessin, 1900 Odostomia hipolitensis Dall & Bartsch, 1909 Odostomia hirotamurana Nomura, 1938 Odostomia honis Saurin, 1959 Odostomia hyalina A. Adams, 1860 Odostomia hyalinella Kuroda & Habe, 1952 Odostomia hypatia Dall & Bartsch, 1912 Odostomia hyphala Watson, 1886 Odostomia icafra Bartch, 1915 Odostomia ignorata (Monterosato, 1917) Odostomia iliuliukensis Dall & Bartsch, 1909 Odostomia improbabilis Oberling, 1970 Odostomia incidata Suter, 1908 Odostomia inconspicua (C.B. Adams, 1852) Odostomia inestojeirae Peñas, Rolán & Swinnen, 2019 Odostomia inflata Carpenter, 1864 Odostomia infrequens (Nomura, 1937) Odostomia inornata Suter, 1908 (nomen dubium) Odostomia intermedia (Carpenter, 1857) † Odostomia iota Maxwell, 1992 Odostomia irafca Bartsch, 1915 Odostomia isthmiea Strong & Hertlein, 1939 Odostomia italoi Penas & Rolan, 1999 Odostomia jacquesi Penas & Rolan, 1999 Odostomia jesusabadi Peñas, Rolán & Swinnen, 2019 Odostomia jonesii Verrill & Bush, 1900

K-L

Odostomia kadiakensis Dall & Bartsch, 1909 Odostomia kelseyi Bartsch, 1912 Odostomia kennerleyi Dall & Bartsch, 1907