Complex sentence: The species in this genus were originally placed in the genus "Dasyatis" by most authors; recent morphological and molecular analyses have conclusively showed that they represent a distinct group, and the genus "Neotrygon" was resurrected for them.
Split into simpler sentences: The species in this genus were originally placed in the genus "Dasyatis" by most authors. However, recent morphological and molecular analyses have conclusively showed that they represent a distinct group, and so the genus "Neotrygon" was resurrected for them.