Belly dragger is the Land Before Time term for crocodilians (Rutiodon is not a Crocodilian),specifically the large ancient species Deinosuchus (Big-mouth Belly dragger) and Sarcosuchus (Maybe Giant Belly Dragger because they say it was a Swimming Sharptooth)
Dil from The Land Before Time IV: Journey through the Mists is a Big-mouth Belly dragger. Sarcosuchus appears in The Land Before Time X, attacking Littlefoot and later his friends (both as they traversed the swamp), and Rutiodon appears in The Amazing Threehorn Girl, chasing the gang until Cera causes a rockslide and later returning with more. Fans think Aetosaurs are the only Belly Draggers that lived on the Great Valley.
Voice actors Edit
Dil = Tress MacNeille