Big-headed turtle

Big-headed turtle
Conservation status
Endangered (IUCN 2.3)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Family:	Platysternidae Gray, 1869
Genus:	Platysternon Gray, 1831
Species:	P. megacephalum
Binomial name
Platysternon megacephalum Gray, 1831
Synonyms
Platysternon megacephalum megacephalum Platysternon megacephalum Gray, 1831 Platisternon megacephalus Gray, 1834 Platysternon megacephalus Gray, 1835 Emys megacephala Schlegel, 1838 Platysternon magacephalum Fitzinger, 1843 (ex errore) Platysternum megacephalum Boulenger, 1889 Platysternon platycephalum Mertens, 1959 (ex errore) Platysternum megalocephalum Stanek, 1959 (ex errore) Platysternon megacephalum megacephalum Wermuth, 1960 Platysternon magacephalum megacephalum Pritchard, 1979 Platysternon megacephalum tristernalis Schleich & Gruber, 1984 Platysternon megacephalum tristornalis Alderton, 1988 (ex errore) Platysternon megacephalum peguense Platysternon peguense Gray, 1870 Platysternon megacephalum peguense Wermuth, 1960 Platysternon megacephalum vogeli Wermuth, 1969 Platysternon megacephalum penguense Nutaphand, 1979 (ex errore) Platysternon megacephalum penuense Nutaphand, 1979 (ex errore) Platysternon megacephalum peguensis Sharma, 1998 (ex errore) Platysternon megacephalum shiui Platysternon megacephalum shiui Ernst & McCord, 1987

The big-headed turtle (Platysternon megacephalum) is a species of turtle in the family Platysternidae from Southeast Asia and southern China. For Madagascar see Madagascan big-headed turtle.

Previously considered a distinct family placed on occasion in "Kinosternoidea", it was later moved to the Emydidae. With the Geoemydidae being split off from these, it seems wisest to reinstate, at least for the time being, the Platysternidae. This, as well as the subfamily and the genus Platysternon, are monotypic.

It is found in Cambodia, China, Laos, Myanmar, Thailand, and Vietnam.

The big-headed turtle is known to readily climb over obstacles in and around rivers and fast streams, using its tail as a prop to extend the reach of its strong claws; it also uses its beak to assist in climbing. It has been reported to climb trees and bushes. It is not a strong swimmer, and when swimming, this species occasionally arches its tail in the manner of a scorpion. The big-headed turtle cannot pull its head in its shell. That being the case, it will not hesitate to use its powerful jaws to defend itself. It is a fish and snail eater.

The big-headed turtle is readily consumed in Asia and is frequently a market item. Hunters capture them on lines with baited straight pins, so this species is rapidly disappearing in the wild.

In addition, two other subspecies, P. m. tristernalis (1984) and P. m. vogeli (1969), have been given, but may be invalid.

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