Cacops

Cacops is a genus of dissorophid temnospondyl that is known from the Kungurian stage of the Early Permian of the central United States.

Description
It was about 40 centimetres (16 in) long and well adapted to a terrestrial lifestyle, with a heavily built skull, strong legs, a short tail, and a row of armor plates along its back. Compared to other dissorophids, it has an enormous otic notch in the back of the skull enclosed with a bony bar, indicating a large eardrum. Edwin Colbert suggests that perhaps it was a nocturnal animal like modern frogs. Cacops was first named by American paleontologist Samuel Wendell Williston with the description of the type species C. aspidephorus from Texas in 1910. A second species, C. morrisi, was named from Oklahoma in 2009.