New Chroniosuchian materials from the Permian and Triassic of Xinjiang Province, China
The Chroniosuchians were an enigmatic clade of non-Amniotic Tetrapods with uncertain phylogenetic position. This group can be divided into two families, Bystrowianidae and Chroniosuchidae. The earliest representatives of both families are known from the middle Permian Dashankou Fauna of Gansu Province, China. The latest representative of Chroniosuchidae is known only from a single Triassic taxon, Madygenerpeton pustulatus, from the Ladinian or Carnian of Kyrgyzstan; while those of Bystrowianidae are known from Middle Triassic of Russia and Germany.