They are remarkable for their large size, some having a spread of wings not less than twenty-five feet. They differ widely from the Pterodactyls of the old world, especially in the absence of teeth, and hence have been placed by the writer in a new order, Pteranodontia, from the typical genus Pteranodon. [O.C. Marsh, "Principal Characters of American Pterodactyls," 1876]
它們的巨大身軀和不亞於25英尺的翅膀展開大小讓人驚異。它們在很多方面與舊世界的翼龍截然不同,特別是 absence of teeth,因此,作者將它們歸爲新的目 Pteranodontia,以典型的類 Pteranodon 來區別。