Newtoniellidae is a family of minute sea snails, marine gastropod mollusks or micromollusks in the superfamily Triphoroidea.It contains the following subfamilies : \n* Adelacerithiinae \n* Adelacerithium Ludbrook, 1941 \n* Ataxocerithiinae \n* Ataxocerithium Tate, 1894 \n* Eumetulinae \n* Cerithiopsida Bartsch, 1911 \n* Embrionalia Golikov, 1988 \n* Eumetula Thiele, 1912 \n* Furukawaia Kuroda & Habe in Habe, 1961 \n* Marshallaskeya Gründel, 1980 \n* Laeocochlidinae \n* Laeocochlis Dunker & Metzger, 1875 \n* Sasamocochlis Gründel, 1980 \n* Newtoniellinae \n* Cerithiella Verrill, 1882 \n* Granulotriforis Kosuge, 1967 \n* Paramendax A. W. B. Powell, 1937 \n* Trituba Jousseaume, 1884Genera brought into synonymy \n* Altispecula Powell, 1930: synonym of Eumetula (Altispecula) Powell, 1930 repre