A new species described from incomplete skeletons collected at Crystal Cave, Manawainui Gulch, Maui, Barbers Point and Ulupau , Oahu and Moomomi ,Molokai. Described as a finch with a cone-shaped bill.The body size is in the range of Telespiza ultima.In general bill shape, X. fastigialis is icterid like.

Fossils of X. fastigialis occur commonly on the three adjacent islands of Oahu,Molokai and Maui,making it the most widely-distributed of the new fossil species.

Please do what you can to save the native Hawaiian forest bird species that remain.