Pleurodira


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Pleurodira

[‚plu̇r·ə′dī·rə]
(vertebrate zoology)
A suborder of turtles (Chelonia) distinguished by spines on the posterior cervical vertebrae so that the head is retractile laterally.

Pleurodira

 

an order of reptiles. A turtle whose neck is long and can be bent to one side and placed in the gap between the carapace and the plastron, with the head being hidden in the axillary region. Length of the shell is 30 to 77 cm. These turtles inhabit fresh waters of South America, Australia, Africa, and Madagascar. They are differentiated into two families: Pelomedusidae and snake-necked turtles (Chelidae). The latter are distinguished by an especially long neck. Pleurodira leave the water relatively infrequently; many live on the bottoms of bodies of water. They feed mainly on small fishes, which they watch for and catch, thrusting their long necks forth with lightning rapidity. Some Pleurodira have commercial value; their meat and sometimes their eggs are used in food.

References in periodicals archive ?
Esta especie pertenece al suborden Pleurodira y es la tortuga dulceacuicola mas grande de America del Sur (Garcia, 2005; Rueda-Almonacid et al.
6A-D) is providing relevant information to increase the knowledge of this clade of Pleurodira.
He introduced Sontiochelys as a new type of so-called amphibian turtles ("Lurchschildkroten"), as Pleurodira was called at that time.
In the present study, the male reproductive system of Phrynops geoffroanus (Testudines: Pleurodira, Chelidae) is described based on biometric data of the testes and the animal, in order to check for the existence of individual and seasonal anatomical variations.
Algunos aspectos bioecologicos de Podocnemis lewyana (Dumeril 1852); (Testudinata, Pleurodira, Pelomedusidae 1830).
Key words: Turtles, Pleurodira, chelid, genera, South America, toadhead, Iquitos, systematics.
Turbulent" well describes the taxonomic history of the New World Pleurodira.
The suborder Pleurodira (Cope 1864) is distinguished by the following combination of characters (after Legler and Georges 1993): the neck flexes laterally to either side and tucks under the anterior edge of the carapace; a trochlear pulley system of the adductor muscles of the jaw utilizes the lateral process of the pterygoid bone to enhance muscular efficiency as opposed to the situation in the Cryptodira where the antero-dorsal edge of the otic capsule is used; and the pelvis is always fused to the plastron.
Turtle fossils belong to a member of Pleurodira (Bothremydidae) and probably to an indeterminate Pan-Cryptodira.
En adicion, la ausencia de escultura externa permite distinguir a este elemento de los materiales pertenecientes a la familia Chelidae, los unicos Pleurodira presentes en la zona de estudio.
La presencia de cicatrices para la articulacion con la cadera, la ornamentacion de surcos dicotomizados en la superficie de rodas las placas, la debil conexion entre plastron-caparazon y el borde medial de las placas perifericas libre son caracteres que en conjunto permiten la asignacion de los elementos aqui mencionados como pertenecientes a tortugas pleurodiras de la familia Chelidae (LAPPARENT DE BROIN & DE LA FUENTE, 2001; GASPARINI & DE LA FUENTE, 2000).