Where does “Acheilognathus” come from?

Acheilognathus (Translingual) comes from Ancient Greek γνᾰ́θος — jaw.

Ancestry of “Acheilognathus”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	γνᾰ́θος	jaw

Acheilognathus — Etymology, Origin & Word History | Etymology Explorer