Tornidae is a family of very small and minute sea snails with an operculum, marine gastropod mollusks in the clade Littorinimorpha. This family used to be known as the Vitrinellidae. Iredale has shown that the family Adeorbidae should be called Tornidae
Family names cited with two dates (the second one in parentheses) are those ruled by Article 40(2) of ICZN. "If ... a family-group name was replaced before 1961 because of the synonymy of the type genus, the replacement name is to be maintained if it is in prevailing usage. A name maintained by virtue of this Article retains its own author [and date, the first date cited] but takes the priority of the replaced name [the date cited in parentheses, here alluding to Adeorbidae Monterosato, 1884]
The shells of the snails in this family are minute, colorless and glassy.
The paucispiral shell is umbilicated, auriform and depressed. The entire aperture is oblique. The shell has a simple columella, and a rounded, sharp outer lip. The corneous operculum is paucispiral, and has an eccentric nucleus.
The body of the animal differs from species in the family Trochidae by having no cirriform appendages of the foot. The radula is taenioglossate. (Thiele, 1925)
The following subfamilies were recognized in the 2005 taxonomy of Bouchet & Rocroi, but have now become alternate representations:
Circulinae Fretter & Graham, 1962
Torninae Sacco, 1896 (1884)
Teinostomatinae Cossmann, 1917
Vitrinellinae Bush, 1897
Genera in the family Tornidae include:
Subfamily Vitrinellinae
Cyclostremiscus Pilsbry & Olsson, 1945
Subfamily Circulinae
Circulus Jeffreys, 1865
Subfamily ?
Anticlimax Pilsbry & McGinty, 1946
Aorotrema Schwengel & McGinty, 1942
Canimarina Aguayo & Borro, 1946
Caperella Laseron, 1958
Circlotoma Laseron, 1958
Circulter Laseron, 1958
Cochliolepis Stimpson, 1958
Discopsis de Folin, 1870
Discreliotia Laseron, 1958
Elachorbis Iredale, 1914
Episcynia Mörch, 1875
Esmeralda Pilsbry & Olsson, 1952
Laciniorbis Martens, 1897
Lydiphnis Melvill, 1906
Moeniatoma Laseron, 1958
Neusas Warén & Bouchet, 2001
Ovini Simone, 2013
Panastoma Pilsbry & Olsson, 1945
Parviturboides Pilsbry & McGinty, 1949
Peripitoma Laseron, 1958
Pleuromalaxis Pilsbry & McGinty, 1945
Ponderinella Marshall, 1988
Pseudoliotia Tate, 1898
Pygmaeorota Kuroda & Habe, 1952
Scissilabra Bartsch, 1907
Scrupus Finlay, 1927
Sigaretornus Iredale, 1936
Solariorbis Conrad, 1865
Teinostoma H. Adams & A. Adams, 1853
Tholostoma Laseron, 1958
Tornus Turton & Kingston, 1830
Uzumakiella Habe, 1958
Vitridomus Pilsbry & Olsson, 1945
Vitrinella C.B. Adams, 1850
Vitrinorbis Pilsbry & Olsson, 1952
Woodringilla Pilsbry & Olsson, 1951
Genera brought into synonymy
Adeorbis S.V. Wood, 1842: synonym of Tornus Turton & Kingston, 1830
Climacia Dall, 1903: synonym of Anticlimax Pilsbry & McGinty, 1946
Climacina Aguayo & Borro, 1946: synonym of Anticlimax Pilsbry & McGinty, 1946
Liochrysta Laseron, 1958: synonym of Pseudoliotia Tate, 1898
Lioprora Laseron, 1958: synonym of Canimarina Aguayo & Borro, 1946
Miralabrum Pilsbry & Olsson, 1945: synonym of Cyclostremiscus Pilsbry & Olsson, 1945
Ponocyclus Pilsbry, 1953: synonym of Cyclostremiscus Pilsbry & Olsson, 1945
Pseudorotella P. Fischer, 1857: synonym of Teinostoma H. Adams & A. Adams, 1853
Pygmaerota Kuroda & Habe, 1952: synonym of Pygmaeorota Kuroda & Habe, 1954
Soyorota Habe, 1961: synonym of Circulus Jeffreys, 1865
Tinostoma P. Fischer, 1885: synonym of Teinostoma H. Adams & A. Adams, 1853
Alternate representations
Subfamily Circulinae Fretter & Graham, 1962
Subfamily Teinostomatinae Cossmann, 1917
Subfamily Torninae Sacco, 1896 (1884)
Subfamily Vitrinellinae Bush, 1897
