Later species were larger and more actively predaceous. It is obvious that the dental specializations related to predaceous habits. Allowing for a high posture and long strides for a predaceous mode of life. Agabinae is a subfamily of predaceous diving beetles in the family Dytiscidae. Cybistrinae is a subfamily of predaceous diving beetles in the family Dytiscidae. Uvarus falli is a species of predaceous diving beetle in the family Dytiscidae. Hydaticus aruspex is a species of predaceous diving beetle in the family Dytiscidae. Uvarus texanus is a species of predaceous diving beetle in the family Dytiscidae. Rhantus binotatus is a species of predaceous diving beetle in the family Dytiscidae. Agabus bifarius is a species of predaceous diving beetle in the family Dytiscidae. Agabinus sculpturellus is a species of predaceous diving beetle in the family Dytiscidae. Agabus strigulosus is a species of predaceous diving beetle in the family Dytiscidae. Rhantus wallisi is a species of predaceous diving beetle in the family Dytiscidae. Sanfilippodytes edwardsi is a species of predaceous diving beetle in the family Dytiscidae. Neoclypeodytes cinctellus is a species of predaceous diving beetle in the family Dytiscidae.