Borsoniidae is a monophyletic family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea. In 2011, Bouchet, Kantor et al. brought genera from the subfamilies Clathurellinae and Raphitominae they were previously placed in the family Conidae), as well as genera from the subfamily Zemaciinae (at that point belonging to the family Turridae), together to form the family Borsoniidae. This re-arrangement was based on anatomical characters and a dataset of molecular sequences of three gene fragments Description This family is a rather heterogenous group, with wide-ranging varieties in their properties. The medium- to large-sized shells are fusiform to biconic in shape. Their size has a wide range (between 5 mm and 80 mm). The shell can be longitudinally coarsely ribbed, but axial ribs are sometimes obsolete to absent. The smooth columella has a strong (one to three plicae) to obsolete plication upon the middle. This plication varies within genera. In the genus Cordiera there are two columellar plaits. The aperture is elliptical to oval in shape and it has a short to moderately long (e.g. Zemacies excelsa) siphonal canal and a deep anal sinus. The anterior canal has a moderate length and is slightly twisted to the left. The thin outer lip is arcuate. The vestigial or fully developed operculum has a terminal nucleus, and may be missing in some species. The radula is absent in the genus Zemacies. Genera Antarctospira Kantor, Harasewych & Puillandre, 2016 ? Apaturris Iredale, 1917 Aphanitoma Bellardi, 1875 Asthenotoma Harris & Burrows, 1891 Austroturris Laseron, 1954 Awateria Suter, 1917 Bathytoma Harris & Burrows, 1891 Belaturricula Powell, 1951 Borsonella Dall, 1908 Borsonellopsis McLean, 1971 Borsonia Bellardi, 1839 Cordieria Rouault, 1848 Darbya Bartsch, 1934 Diptychophlia Berry, 1964 Drilliola Locard, 1897 Filodrillia Hedley, 1922 Genota H. Adams & A. Adams, 1853 Glyptaesopus Pilsbry & Olsson, 1941 Heteroturris Powell, 1967 Maoritomella Powell, 1942 Microdrillia Casey, 1903 Ophiodermella Bartsch, 1944 Paraborsonia Pilsbry, 1922 Phenatoma Finlay, 1924 Pulsarella Laseron, 1954 Retidrillia McLean, 2000 Suavodrillia Dall, 1918 Tomopleura Casey, 1904 Tropidoturris Kilburn, 1986 Typhlodaphne Powell, 1951 Typhlomangelia G.O. Sars, 1878 Zemacies Finlay, 1926 Genera brought into synonymy Acrobela Thiele, 1925 : synonym of Microdrillia Casey, 1903 Acropota F. Nordsieck, 1977: synonym of Microdrillia Casey, 1903 Boettgeria Peyrot, 1931 : synonym of Boettgeriola Wenz, 1943 Boettgeriola Wenz, 1943 : synonym of Borsonia Bellardi, 1839 Genotia P. Fischer, 1883 : synonym of Genota H. Adams & A. Adams, 1853 Micantapex Iredale,