Tornidae

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 Monterosato, 1884 should be called Tornidae
Family names cited with two dates are those ruled by Article 40 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 but takes the priority of the replaced name

General characteristics

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.

Subfamilies

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
Teinostomatinae Cossmann, 1917
Vitrinellinae Bush, 1897

Genera

Genera in the family Tornidae include:

† Adeorbella Briart & Cornet, 1887 Anticlimax Pilsbry & McGinty, 1946Aorotrema Schwengel & McGinty, 1942Canimarina Aguayo & Borro, 1946: synonym of Anticlimax Pilsbry & McGinty, 1946
† Cantaurea Landau, da Silva & Heitz, 2016 Caperella Laseron, 1958Circlotoma Laseron, 1958Circuitus Rubio & Rolán, 2017Circulter Laseron, 1958Cochliolepis Stimpson, 1958Cyclostremiscus Pilsbry & Olsson, 1945Discopsis de Folin, 1870Discreliotia Laseron, 1958Elachorbis Iredale, 1914Episcynia Mörch, 1875Esmeralda Pilsbry & Olsson, 1952Laciniorbis Martens, 1897Lophocochlias Pilsbry, 1921Lydiphnis Melvill, 1906
† Megatyloma Cossmann, 1888 Moeniatoma Laseron, 1958Neusas Warén & Bouchet, 2001Ovini Simone, 2013Panastoma Pilsbry & Olsson, 1945Parviturboides Pilsbry & McGinty, 1949Peripitoma Laseron, 1958Pleuromalaxis Pilsbry & McGinty, 1945
† Pterolabrella Maxwell, 1969 Pygmaeorota Kuroda & Habe, 1954Scissilabra Bartsch, 1907Scrupus Finlay, 1927 Sigaretornus Iredale, 1936Solariorbis Conrad, 1865Tholostoma Laseron, 1958Tornus Turton & Kingston, 1830Tuberes Rubio & Rolán, 2017Uzumakiella Habe, 1958 Vitridomus Pilsbry & Olsson, 1945Vitrinorbis Pilsbry & Olsson, 1952Woodringilla Pilsbry & Olsson, 1951

;Genera brought into synonymy:Adeorbis S.V. Wood, 1842: synonym of Tornus Turton & Kingston, 1830Climacia Dall, 1903: synonym of Anticlimax Pilsbry & McGinty, 1946Climacina Aguayo & Borro, 1946: synonym of Anticlimax Pilsbry & McGinty, 1946Liochrysta Laseron, 1958: synonym of Pseudoliotia Tate, 1898Lioprora Laseron, 1958: synonym of Canimarina Aguayo & Borro, 1946Miralabrum Pilsbry & Olsson, 1945: synonym of Cyclostremiscus Pilsbry & Olsson, 1945Ponocyclus Pilsbry, 1953: synonym of Cyclostremiscus Pilsbry & Olsson, 1945Pygmaerota Kuroda & Habe, 1952: synonym of Pygmaeorota Kuroda & Habe, 1954Soyorota Habe, 1961: synonym of Circulus Jeffreys, 1865
;Alternate representations:

Subfamily Circulinae Fretter & Graham, 1962
Subfamily Torninae Sacco, 1896
Subfamily Vitrinellinae Bush, 1897