Hyalosagda simils (C.B. Adams, 1849)
Hyalosagda simplex (H.A. Pilsbry & A.P. Brown,1910)
Sagda spei H.A. Pilsbry & A.P. Brown,1910
Sagda spei portlandensis H.B. Baker, 1935
Sagda spiculosa (L. Pfeiffer, 1859)
Stauroglypta spreta (C.B. Adams, 1851)
Stauroglypta steveni (H.A. Pilsbry, 1950)
Setipellis stigmatica (L. Pfeiffer, 1841)
Suavitas suavis (J. Gundlach, 1857)
Hyalosagda subaquila (R.J. Shuttleworth, 1854)
Aerotrochus subpyramidalis (C.B. Adams, 1845)
Stauroglypta summa (H.A. Pilsbry, 1930)
Odontosagda suprema (H.A. Pilsbry, 1933)
Xenodiscula taintori C. Goodrich& H. Van Der Schalie, 1937
Zaphysema tenerrimum (C.B. Adams, 1845)
Volvidens tichostoma (L. Pfeiffer, 1839)
Sagda torrefacta (C.B. Adams, 1849)
Hojeda translucens (J. Gundlachin L. Pfeiffer, 1860)
Trifaux triodon H.B. Baker, 1935
Sagda triptycha (L. Pfeiffer, 1859)
Lacteoluna trochella C.B. Wurtz, 1950
Zaphysema tunicatum (C.B. Adams, 1849)
Lacteoluna turbiniformis (L. Pfeiffer, 1839)
Aerotrochus turbonella (P.M.A. Morelet, 1851)
Hojeda vanattai H.B. Baker, 1926
Xenodiscula venezuelensis H.A. Pilsbry, 1919
Lacteoluna vortex (L. Pfeiffer, 1839)