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Jonkeria spp.
Topic Started: Apr 26 2014, 10:35 PM (866 Views)
Ausar
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Jonkeria spp.

Posted Image

Temporal range: Capitanian, 265–260Ma

Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Order: Therapsida
Suborder: †Dinocephalia
Family: †Titanosuchidae
Genus: †Jonkeria
Species:

  • †J. truculenta
  • †J. boonstrai
  • †J. haughtoni
  • †J. ingens
  • †J. koupensis
  • †J. parva
  • †J. rossouwi


Jonkeria was a very large omnivorous (although there is some dispute to this - e.g. Colbert 1969 p. 136) dinocephalian, from the Tapinocephalus Assemblage Zone, Lower Beaufort Group, of the South African Karroo.

Description
The overall length was 3.5 metres (11 ft) or more (up to 4 or 5 metres (13 or 16 ft)), 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.

Classification
About a dozen species have been named, including the type species, J. truculenta. At least some of the other species were synonymised by Boonstra 1969. There has been no recent review of the genus.

Posted Image
Credit goes to DiBgd for the above illustration.
Edited by Taipan, Apr 27 2014, 09:56 PM.
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