Assiminea snails with an operculum , aquatic gastropod mollusks, or micromollusks , in the family Assimineidae.
Distribution and habitat These snails can be found worldwide. They live usually in brackish water and salt marshes of tropical and temperate regions, at beaches, in water and at land.
These are very small to medium large snails, between 2 and 13 mm). Some adults do not exceed a size of 3 mm. The shape of the thin shells is somewhat ovately conical. The margin of the aperture is simple. The operculum is in most cases horny. The eyes are at the end of short, stout stalks. They feed on vegetable detritus and small algae. They lay their eggs in the mud, and hatch as free-swimming larvae.
According to the World Register of Marine Species , the following species with valid names are included within the genus Assiminea :
Assiminea aurifera Preston, 1912 Assiminea avilai van Aartsen, 2008 Assiminea bella Kuroda, 1958 Assiminea brevicula (Pfeiffer, 1854) Assiminea californica (Tryon, 1865) : California assimineaAssiminea compacta (Carpenter, 1864) Assiminea cornea (Leith, 1853) Assiminea dubiosa (C.B. Adams, 1852) Assiminea estuarina Habe, 1946 Assiminea geayi Lamy, 1910 Assiminea gittenbergeri van Aartsen, 2008 Assiminea glaubrechti van Aartsen, 2008 Assiminea globulus Connoly, 1939 Assiminea grayana Fleming , 1828Assiminea hessei O. Boettger, 1887 Assiminea hiradoensis Habe, 1942 Assiminea infima Berry, 1947 (badwater snail )Assiminea japonica Martens, 1877 Assiminea littorina (Delle Chiaje, 1828) sensu Philippi, 1841 Assiminea lugubris Turton, 1932 Assiminea lutea (A. Adams, 1861) Assiminea mesopotamica Glöer, Naser & Yasser, 2007 Assiminea moroccoensis Rolán, 2013 Assiminea nitida (Pease, 1865) : this species belongs to the genus Paludinella umbilicus Assiminea occulta Rolán, 2013 Assiminea ovata (Krauss, 1848) Assiminea palauensis Thiele, 1927 Assiminea parasitologica Kuroda, 1958 Assiminea pecos Taylor , 1987Assiminea possietica Golikov & Kussakin in Golikov & Scarlato, 1967 Assiminea principensis Rolán, 2013 Assiminea relata Cotton, 1942 Assiminea rolani van Aartsen, 2008 Assiminea saotomensis Rolán, 2013 Assiminea senegalensis Rolán, 2013 Assiminea succinea (Pfeiffer, 1840) : Atlantic assimineaAssiminea theobaldiana Nevill, 1880 Assiminea translucens (Carpenter, 1864) Assiminea vulgaris (Webster, 1905) † Assiminea waitemata Laws, 1950 Assiminea zubairensis Glöer & Naser, 2013 The Indo-Pacific Molluscan Database also includes the following species with names in current use :
Assiminea interrupta Dautzenberg & Fischer, 1905 Assiminea septentrionalis Habe, 1942 The database ITIS also mentions the following species :
Assiminea auberiana Orbigny, 1842 Species brought into synonymy Assiminea affinis Böttger, 1887 : synonym of Taiwanassiminea affinis (Böttger, 1887) Assiminea affinis Mousson, 1874 : synonym of Cryptassiminea buccinoides (Quoy & Gaimard, 1834) Assiminea angustata Pilsbry, 1901 : synonym of Ansola angustata (Pilsbry, 1901) Assiminea australis Petterd, 1889 : synonym of Cryptassiminea buccinoides (Quoy & Gaimard, 1834) Assiminea australis Thiele, 1927 : synonym of Assiminea brevicula (Pfeiffer, 1855) Assiminea bedaliensis Rensch, 1934 : synonym of Taiwanassiminea bedaliensis (Rensch, 1934) Assiminea bicincta Petterd, 1889 : synonym of Cryptassiminea buccinoides (Quoy & Gaimard, 1834) Assiminea bifasciata Nevill, 1880 : synonym of Assiminea ovata (Krauss, 1848) Assiminea buccinoides (Quoy and Gaimard, 1834) : synonym of Cryptassiminea buccinoides (Quoy & Gaimard, 1834) Assiminea capensis Bartsch, 1915 : synonym of Assiminea ovata (Krauss, 1848) Assiminea castanea Westerlund, 1883 : synonym of Angustassiminea castanea (Westerlund, 1883) Assiminea creutzbergi De Jong & Coomans, 1988 : synonym of Barleeia creutzbergi (De Jong & Coomans, 1988) Assiminea gerhardtae De Jong & Coomans, 1988 : synonym of Caelatura gerhardtae (De Jong & Coomans, 1988) Assiminea hayasii Habe, 1942 : synonym of Taiwanassiminea hayasii (Habe, 1942) Assiminea lentula van Benthem Jutting, 1963 : synonym of Taiwanassiminea lentula (van Benthem Jutting, 1963) Assiminea pagodella Hedley, 1903 : synonym of Ascorhis victoriae (Tenison-Woods, 1878) Assiminea queenslandica Thiele, 1927 : synonym of Taiwanassiminea affinis (Böttger, 1887) Assiminea recta Mousson, 1874 : synonym of Peringia ulvae (Pennant, 1777) Assiminea riparia van Benthem Jutting, 1963 : synonym of Taiwanassiminea riparia (van Benthem Jutting, 1963) Assiminea sororcula van Benthem Jutting, 1963 : synonym of Taiwanassiminea sororcula (van Benthem Jutting, 1963) Assiminea tasmanica Tenison-Woods, 1876 : synonym of Cryptassiminea buccinoides (Quoy & Gaimard, 1834) 
