| Dasya mollis Harv., 1853 |
| Dasya mucronata Harvey, 1853 |
| Dasya ocellata (Gratel.) Harv., 1833 |
| Dasya pedicellata (C. Agardh) C. Agardh, 1824 |
| Dasya pedicellata subsp. stanfordiana (Farlow) J.N. Norris & Bucher, 2014 |
| Dasya punicea (Zanardini) Menegh. ex Zanardini, 1841 |
| Dasya ramosissima Harv., 1853 |
| Dasya rigidula (Kütz.) Ardiss., 1878 |
| Dasya sertularioides M.A. Howe & W.R. Taylor, 1931 |
| Dasya sinicola (Setch. & N.L. Gardner) E.Y. Dawson, 1959 |
| Dasya sinicola var. abyssicola (E.Y. Dawson) E.Y. Dawson, 1963 |
| Dasya sinicola var. californica (N.L. Gardner) E.Y. Dawson, 1963 |
| Dasya spinigera E.Y. Dawson, 1963 |
| Dasya spinuligera Collins, 1917 |
| Dasya stanfordiana Farlow, 1902 |
| Dasyaceae Kütz., 1843 |
| Dasyoideae Schmitz & Falkenb., 1897 |
| Dasyopsis (Mont.) Mont., 1847 |
| Dasyopsis antillarum M. Howe, 1920 |
| Dasysiphonia I.K. Lee & J.A. West, 1980 |