 "L. platystomus" may be a species of "Amblydectes"

In Peter Wellnhofer's 1991 "The Illustrated Encyclopedia of Pterosaurs", written before Unwin's work, the species were included with "Ornithocheirus" (because of "L. compressirostris" being thought to be the type species), and are in fact the main fossils illustrated to represent the genus.Unwin placed them in their own family, Lonchodectidae, which he grouped with the ctenochasmatoids in 2003, and with the azhdarchoids, including the tapejarids and azhdarchids, in 2006.Below is a cladogram showing the phylogenetic placement of this genus within Pteranodontia from Andres and Myers (2013).