| Biddulphia Gray, 1821 |
| Biddulphia alternans (Bailey) Van Heurck, 1885 |
| Biddulphia antediluviana (Ehrenb.) van Heurck, 1885 |
| Biddulphia aurita (Lyngb.) Bréb., 1838 |
| Biddulphia balaena (Ehrenb.) Brightw., 1859 |
| Biddulphia biddulphiana (J.E. Smith) C.S. Boyer, 1901 |
| Biddulphia deodora G.D. Hanna & W. Grant, 1926 |
| Biddulphia dubia (Brightw.) Cleve, 1883 |
| Biddulphia granulata Roper, 1859 |
| Biddulphia interrupta Boyer, 1898 |
| Biddulphia longicruris Grev., 1859 |
| Biddulphia longicruris var. hyalina (Scrhöd.) E.E. Cupp, 1943 |
| Biddulphia mobiliensis (Bailey) Grunow, 1882 |
| Biddulphia obtusa (Kütz.) Grunow, 1868 |
| Biddulphia pentacrinus (Ehrenb.) Boyer, 1901 |
| Biddulphia pulchella Gray, 1821 |
| Biddulphia reticulata Roper, 1859 |
| Biddulphia sculpta (Shadbolt) Van Heurck, 1885 |
| Biddulphia sinensis Grev., 1886 |
| Biddulphia spinosa (Bailey) Boyer, 1901 |