| Biddulphia alternans | species |
| Biddulphia amphicephala | species |
| Biddulphia antediluviana | species |
| Biddulphia apiculata | species |
| Biddulphia areolata | species |
| Biddulphia azorica | species |
| Biddulphia belgicae | species |
| Biddulphia biddulphiana | species |
| Biddulphia brevis | species |
| Biddulphia capuzina | species |
| Biddulphia catenata | species |
| Biddulphia cornuta | species |
| Biddulphia decussta | species |
| Biddulphia discigera | species |
| Biddulphia echinulata | species |
| Biddulphia ecornuta | species |
| Biddulphia elegans | species |
| Biddulphia elegantula | species |
| Biddulphia gigantea | species |
| Biddulphia gruendleri | species |
| Biddulphia homala | species |
| Biddulphia inelegans | species |
| Biddulphia inflata | species |
| Biddulphia juncta | species |
| Biddulphia lesdiana | species |
| Biddulphia loczyi | species |
| Biddulphia minutissima | species |
| Biddulphia nitida | species |
| Biddulphia obtusa | species |
| Biddulphia petrolia | species |
| Biddulphia primordialis | species |
| Biddulphia punctata | species |
| Biddulphia quinqueguttata | species |
| Biddulphia radiata | species |
| Biddulphia regina | species |
| Biddulphia reticulata | species |
| Biddulphia retiformis | species |
| Biddulphia rhombus | species |
| Biddulphia rigida | species |
| Biddulphia robertsiana | species |
| Biddulphia rostrata | species |
| Biddulphia sanpedroanus | species |
| Biddulphia schmidtii | species |
| Biddulphia schroederiana | species |
| Biddulphia scitula | species |
| Biddulphia sculpta | species |
| Biddulphia sinuata | species |
| Biddulphia spinosa | species |
| Biddulphia subaequa | species |
| Biddulphia suborbicularis | species |
| Biddulphia tenera | species |
| Biddulphia tridens | species |
| Biddulphia tridentata | species |
| Biddulphia tridentula | species |
| Biddulphia tripartita | species |
| Biddulphia trisinua | species |
| Biddulphia tumida | species |
| Biddulphia tuomeyi | species |
| Biddulphia ursina | species |
| Biddulphia van-heurckii | species |
| Biddulphia vesiculosa | species |