from The Century Dictionary and Cyclopedia
- n. The typical and only genus of rodents of the family Haplodontidæ. H. rufus or Aplodontia leporina is the sewellel or Rocky -Mountain beaver.
- n. A genus of elasmobranchiate fishes.
Sorry, no etymologies found.
Arctodus haplodon, suggests that the latter, at a time when what later became a sealed cavern was still an open cleft in the rocks, preyed upon young mastodons, which they may have separated from their mothers and chased over the edge of the cliff-like wall.
Arctodus haplodon was a bear somewhat larger than the grizzly and in weight might well have been quite equal, if not superior, to a young mastodon, judging from the size of the jaws of the latter which we possess.