| Nominal Species (n = 5) | Present allocation (n = 5) | Ref. |
|---|---|---|
| Isthmia enervis Ehrenberg | Isthmia enervis | 80701 |
| Isthmia nervosa Kützing | Isthmia nervosa | 80701 |
| Biddulphia petrolia Hanna | Biddulphia petrolia | 80701 |
| Biddulphia radiata Roper | Biddulphia radiata | 80701 |
| Biddulphia regina W. Smith | Biddulphia regina | 80701 |