Complex sentence: The Pleurodira are known more commonly as the side-necked turtles and the name Pleurodira quite literally translates to side neck, whereas the Cryptodira are known as hidden-neck turtles.
Split into simpler sentences: The Pleurodira are known more commonly as the side-necked turtles and the name Pleurodira quite literally translates to side neck. Whereas the Cryptodira are known as hidden-neck turtles.