Pleurodira are a group of southern-hemisphere turtles which, in order to draw their heads into their shells, must fold their neck to the side, instead of withdrawing it directly under their spine like their cousins the cryptodira.
This article is licensed under the GNU Free Documentation License.
It uses material from the 
"Pleurodira".
Home Page • arts • business • computers • games • health • hospitals • home • kids & teens • news • physicians • recreation• reference • regional • science • shopping • society • sports • world