>>723496560
It's true that Quetzalcoatlus Northropi is very fragmentary, but it's smaller relative Quetzalcoatlus Lawsoni is nearly complete. And just using basic 2+2 logic.
>find complete skeleton of an animal
>find arm of an animal that looks 1:1 exactly the same as the previous animal
>but gigantic
>this must have been a giant version of this animal