Difference between Tortoise(Testudo) and Turtle(Chelone) ?
Tortoise-larger in size,semi terrestrial and fresh water format,oval carapace,forelimbs and hindlimbs are not modified into paddles,head can be completely withdrawn into the shell. Turtle -smaller in size,aquatic and marine form,heart shaped carapace, forelimbs and hindlimbs are modified into paddles,heart is partially withdrawn into the shell.