Where does “Tropeognathus” come from?

Tropeognathus (Translingual) comes from Ancient Greek τρόπις, from Ancient Greek γνάθος, from Proto-Indo-European ǵn̥h₂dʰ-os, from Proto-Indo-European ǵneh₂dʰ-.

Tropeognathus (Translingual): genus|a large pterosaur from the late Early Cretaceous of South America}}

Definitions

genus|a large pterosaur from the late Early Cretaceous of South America}}

Ancestry of “Tropeognathus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	τρόπις	keel
2	Ancient Greek	γνάθος	jaw; point, edge; type of stone
3	Proto-Indo-European	ǵn̥h₂dʰ-os	—
4	Proto-Indo-European	ǵneh₂dʰ-	—

Every word from Proto-Indo-European ǵneh₂dʰ- →Every word from Proto-Indo-European ǵn̥h₂dʰ-os →Every word from Ancient Greek γνάθος →