Not an accepted name (status: unknown).
The accepted name is
Callicladium imponens (Hedw.) Hedenäs, Schlesak & D.Quandt.
Drepanium imponens
(Hedw.) G.Roth
4% complete
No common name
Eur. Laubm., 2: 615. 55 f. 12, 615, 1904
There is no corrections for Drepanium imponens yet.