What is "sebecosuchia"

Sebecosuchia is an extinct group of mesoeucrocodylian crocodyliforms that includes the families Sebecidae and Baurusuchidae. The group first appeared in the Late Cretaceous with the baurusuchids and became extinct in the Miocene with the last sebecids. Fossils have been found primarily from South America but have also been found in Europe, North Africa, and Asia. Some recent studies have separated Baurusuchidae and Sebecidae, making Sebecosuchia polyphyletic, but others have retained it as a valid grouping.