Probainognathia

Lumkuia

• South Africa
• Argentina

The Probainognathia are terrestrial vertebrates from the group of therapsids ( " mammal -like reptiles "). They lived from the lower to the upper Triassic.

Features

The Probainognathia may have only a few typical for the group characteristics. The main feature is the forming secondary palate. Prefrontal and palatine bones have on the front boundary of the orbit bone contact. They also have a characteristic morphology ribs.

System

Most authors divide the Probainognathia into two families, the Probainognathidae whose sole genus is Probainognathus and Chiniquodontidae. In addition, there are two basal genera, Ecteninion and Lumkuia.

• Ecteninion
• Lumkuia
• Probainognathus
• Chiniquodontidae

Chiniquodontidae

The Chiniquodontidae were small to medium-sized carnivores. The cranial window was enlarged and covered half the length of the skull. The orbit is separated by a narrow postorbital skull clasp from the window. The secondary palate, the length of the row of teeth. Chiniquodontidae had four upper and three lower incisors, canines and seven medium-length laterally flattened molars.

Morphologically the Chiniquodontidae are more conservative than the Tritylodontidae and Trithelodonta, but lived in the Middle Triassic, while the more advanced Cynodonten first appeared in the Late Triassic.

Genera

• Chiniquodon, juvenile stages were described as Belesodon and Probelesodon.
• Dromatherium
• Microconodon
• Pseudotriconodon