Jonkeria
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[Photo] life restoration of Jonkeria truculenta. Jonkeria truculenta, a large dinocephalian from the Middle Permian of South Africa, pencil drawing and digital coloring. Date Jan 30, 2007. Author Arthur Weasley http://commons.wikimedia.org/wiki/User:ArthurWeasley
Jonkeria was a very large herbivorous (although sometimes thought to be carnivorous - e.g. Colbert 1969 p.136) dinocephalian, from the Tapinocephalus Assemblage Zone, Lower Beaufort Group, of the South African Karroo. The overall length was three and a half meters or more (up to 4 or 5 meters), the skull about 55 cm long.
The skull is nearly twice as long as wide, and the snout is elongated and provided with sharp incisors and large canines. The cheek teeth were rather small.
The body is robustly built, and the limbs stout. According to Boonstra 1969 p.38, Jonkeria cannot be distinguished from its relative Titanosuchus on cranial grounds, but only in limb length; Jonkeria having short and squat limbs, and Titanosuchus long ones.
About a dozen species have been named, including the type species, Jonkeria truculenta. At least some of the other species were synonymised by Boonstra 1969. There has been no recent review of the genus.
Species
Jonkeria truculenta
Jonkeria boonstrai
Jonkeria haughtoni
Jonkeria ingens
Jonkeria koupensis
Jonkeria parva
Jonkeria rossouwi
Jonkeria vanderbyli
http://en.wikipedia.org/wiki/Jonkeria
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